# GTM Stacker Agent Registry — Recent Export > A daily-updated, agent-native registry of open-source tool discoveries, tool updates, and curated news for the go-to-market / RevOps engineering niche. Machine-readable first: agents can discover, parse, page, and delta-sync it without scraping HTML. Generated 2026-09-08T00:00:00Z. Showing the 200 most recently-updated of 316 active entries, as one long-context document. For the COMPLETE catalog use https://gtmstacker.com/registry/catalog/all.json (structured) or per-capability exports at https://gtmstacker.com/registry/categories.json. Delta-sync via https://gtmstacker.com/registry/v0.1/by-date/index.json. --- # Headroom > Updated 2026-09-08 · type: tool · category: ai-infrastructure · status: active · rev 1 Open-source context-compression proxy for AI agents (Rust core; Python/TypeScript SDKs): sits between your agent and the LLM and compresses tool outputs,… - Open source: yes (Apache-2.0) - Self-hostable: yes - Pricing model: free - Best for: Teams running agent workloads who want to cut LLM token spend without rewriting their agents. - Last verified: 2026-09-08 - **Canonical:** https://gtmstacker.com/registry/tool/headroom/ - **Source:** [github · headroomlabs-ai/headroom](https://github.com/headroomlabs-ai/headroom) - **Tags:** ai-infrastructure, llm, cost-governance, context-compression, agents - **Repository:** https://github.com/headroomlabs-ai/headroom ## Is Headroom open source? Yes — Apache-2.0-licensed. ## How much does Headroom cost? It is free to use. ## Can I self-host Headroom? Yes — it can be self-hosted. --- Open-source context-compression proxy for AI agents (Rust core; Python/TypeScript SDKs): sits between your agent and the LLM and compresses tool outputs, logs, JSON, code and RAG chunks with format-specific, reversible compressors before the model sees them — no changes to agent code. ## Provenance - Apache-2.0 independently verified (69.9k★, 2,734 commits, active). "Up to 95% fewer tokens at the same benchmark accuracy" is the project's own figure — vendor-claim, not reproduced here. The viral post attributes the project to a Netflix engineer; that attribution is unverified. Surfaced via the 2026-09-08 signal brief (112k-view post). - Curated from the GTM Stacker signal registry (registry_update pass, briefs 2026-09-01→08); license independently WebFetch-verified 2026-09-08. --- # Crew > Updated 2026-09-07 · type: tool · category: workflow-automation · status: active · rev 1 Open-source coordination layer that lets parallel coding-agent sessions (Claude Code, Codex, opencode) share live context, exchange messages and split work… - Open source: yes (MIT) - Self-hostable: yes - Pricing model: free - Best for: Developers running multiple coding agents in parallel who need them to coordinate. - Last verified: 2026-09-08 - **Canonical:** https://gtmstacker.com/registry/tool/crew-agent-coordination/ - **Source:** [github · 0xmmo/crew](https://github.com/0xmmo/crew) - **Tags:** workflow-automation, multi-agent, coding-agents, orchestration, agents - **Repository:** https://github.com/0xmmo/crew ## Is Crew open source? Yes — MIT-licensed. ## How much does Crew cost? It is free to use. ## Can I self-host Crew? Yes — it can be self-hosted. --- Open-source coordination layer that lets parallel coding-agent sessions (Claude Code, Codex, opencode) share live context, exchange messages and split work without branching. ## Provenance - MIT independently verified. VERY EARLY: 22★, 39 commits, single author — treat as a reference implementation to evaluate, not a dependency to bet on (same flag as daily-briefing/Dagychu). - Curated from the GTM Stacker signal registry (registry_update pass, briefs 2026-09-01→08); license independently WebFetch-verified 2026-09-08. --- # Maintainer relicenses from MIT/LGPL to EUPL to close the SaaS loophole > Updated 2026-09-06 · type: news · category: productivity-knowledge · status: active · rev 1 Henri Bergius (NoFlo, Midgard) relicensed his projects from MIT/LGPL to the EUPL-1.2 — an OSI-approved, EU-backed copyleft whose obligations extend to… - Open source: unknown - **Canonical:** https://gtmstacker.com/registry/news/eupl-relicense-saas-loophole/ - **Source:** [bergie.iki.fi](https://bergie.iki.fi/blog/eupl/) - **Tags:** productivity-knowledge, news, agents, governance --- Henri Bergius (NoFlo, Midgard) relicensed his projects from MIT/LGPL to the EUPL-1.2 — an OSI-approved, EU-backed copyleft whose obligations extend to software offered over a network, closing the "SaaS loophole". Relevant when selecting self-hostable tools: license class is a deliberate maker choice, and network-copyleft (EUPL/AGPL) affects hosted redistribution, not internal self-hosting. ## Notes - Primary-source blog post (2026-09-06); EUPL-1.2 OSI approval is public record. No tool entry — this is licensing/governance news for an OSS-tools audience. - Curated from the GTM Stacker signal registry (registry_update pass, briefs 2026-09-01→08). --- # Anthropic releases Commerce Agents — an Apache-2.0 reference blueprint for shopping and merchant agents > Updated 2026-09-04 · type: news · category: commerce-payments · status: active · rev 1 Anthropic published Commerce Agents, an Apache-2.0 reference blueprint for building shopping and merchant agents with Claude, with worked examples across… - Open source: unknown - **Canonical:** https://gtmstacker.com/registry/news/anthropic-commerce-agents-blueprint/ - **Source:** [github · anthropics/commerce-agents](https://github.com/anthropics/commerce-agents) - **Tags:** commerce-payments, news, agents, governance --- Anthropic published Commerce Agents, an Apache-2.0 reference blueprint for building shopping and merchant agents with Claude, with worked examples across retail, commerce, telecom and entertainment. The repo states plainly: "This is a reference implementation; it is not maintained and does not accept contributions" — a starting pattern to fork, not a dependency. ## Notes - Apache-2.0 and the not-maintained disclaimer independently verified on the repo (2.4k★) 2026-09-08. Published as news, not a tool entry, because the maker explicitly disclaims maintenance. - Curated from the GTM Stacker signal registry (registry_update pass, briefs 2026-09-01→08). --- # ACI.dev (Aipolabs) > Updated 2026-09-03 · type: tool · category: mcp-agents · status: active · rev 1 OSS alt to Composio (proprietary), Zapier-for-agents; ~4900 stars; complements Composio, Nango, Klavis; Apache-2.0. Open infra: multi-tenant auth, 600+ tools,… - Open source: yes (Apache-2.0) - Self-hostable: yes - Pricing model: freemium - Best for: Developers building AI agents who need to securely connect multiple users to multiple services via tool-calling integrations. - Last verified: 2026-09-04 - **Canonical:** https://gtmstacker.com/registry/tool/acidev-aipolabs/ - **Source:** [github · github.com/aipotheosis-labs](https://github.com/aipotheosis-labs/aci) - **Tags:** mcp-agents, agent-connectors-mcp-servers - **Repository:** https://github.com/aipotheosis-labs/aci ## Is ACI.dev (Aipolabs) open source? Yes — Apache-2.0-licensed. ## How much does ACI.dev (Aipolabs) cost? It has a free tier plus paid plans. ## Can I self-host ACI.dev (Aipolabs)? Yes — it can be self-hosted. --- OSS alt to Composio (proprietary), Zapier-for-agents; ~4900 stars; complements Composio, Nango, Klavis; Apache-2.0. Open infra: multi-tenant auth, 600+ tools, and a Unified MCP server + VibeOps. Connectors use each app's official OAuth/API keys -> ethical_risk empty. --- # AfterShip/email-verifier > Updated 2026-09-03 · type: tool · category: prospecting-enrichment · status: active · rev 1 Most OSI-clean; Go lib; ~8mo slowing - Open source: yes (MIT) - Self-hostable: yes - Pricing model: free - Best for: Developers who need to programmatically verify email addresses (SMTP checks, disposable/typo detection) without sending actual emails. - Last verified: 2026-09-04 - **Canonical:** https://gtmstacker.com/registry/tool/aftershipemail-verifier/ - **Source:** [github · github.com/AfterShip](https://github.com/AfterShip/email-verifier) - **Tags:** prospecting-enrichment - **Repository:** https://github.com/AfterShip/email-verifier ## Is AfterShip/email-verifier open source? Yes — MIT-licensed. ## How much does AfterShip/email-verifier cost? It is free to use. ## Can I self-host AfterShip/email-verifier? Yes — it can be self-hosted. --- Most OSI-clean; Go lib; ~8mo slowing --- # Agno > Updated 2026-09-03 · type: tool · category: ai-infrastructure · status: active · rev 1 OSS alt to LangGraph; ~41632 stars; via ossinsight.io - Open source: yes (Apache-2.0) - Self-hostable: yes - Best for: Developers building agentic systems who want to run agents as a service and manage their own platform on their own infrastructure. - Last verified: 2026-09-04 - **Canonical:** https://gtmstacker.com/registry/tool/agno/ - **Source:** [github · github.com/agno-agi](https://github.com/agno-agi/agno) - **Tags:** ai-infrastructure - **Repository:** https://github.com/agno-agi/agno ## Is Agno open source? Yes — Apache-2.0-licensed. ## How much does Agno cost? It is open source — self-hosting is free; you pay only for your own infrastructure. ## Can I self-host Agno? Yes — it can be self-hosted. --- OSS alt to LangGraph; ~41632 stars; via ossinsight.io --- # aiogram > Updated 2026-09-03 · type: tool · category: chat-helpdesk · status: active · rev 1 ~5800 stars; complements python-telegram-bot, Telethon; Official Bot API framework (FSM, middleware, magic filters). Auth via bot token. No ToS risk.… - Open source: yes (MIT) - Self-hostable: yes - Pricing model: free - Best for: Python developers building fully asynchronous Telegram bots on the Bot API. - Last verified: 2026-09-04 - **Canonical:** https://gtmstacker.com/registry/tool/aiogram/ - **Source:** [github · github.com/aiogram](https://github.com/aiogram/aiogram) - **Tags:** chat-helpdesk, messaging-chat-platforms - **Repository:** https://github.com/aiogram/aiogram ## Is aiogram open source? Yes — MIT-licensed. ## How much does aiogram cost? It is free to use. ## Can I self-host aiogram? Yes — it can be self-hosted. --- ~5800 stars; complements python-telegram-bot, Telethon; Official Bot API framework (FSM, middleware, magic filters). Auth via bot token. No ToS risk. Complementary alt to python-telegram-bot. --- # airtable.js > Updated 2026-09-03 · type: tool · category: productivity-knowledge · status: active · rev 1 ~2223 stars; complements pyairtable; VENDOR (Airtable) official JavaScript client for the Airtable REST API (PAT/OAuth). ToS-clean and authoritative for… - Open source: yes (MIT) - Self-hostable: yes - Pricing model: free - Best for: Developers building JavaScript/Node or browser applications that need to interact with Airtable bases via the official API. - Last verified: 2026-09-04 - **Canonical:** https://gtmstacker.com/registry/tool/airtablejs/ - **Source:** [github · github.com/Airtable](https://github.com/Airtable/airtable.js) - **Tags:** productivity-knowledge, productivity-knowledge-bases - **Repository:** https://github.com/Airtable/airtable.js ## Is airtable.js open source? Yes — MIT-licensed. ## How much does airtable.js cost? It is free to use. ## Can I self-host airtable.js? Yes — it can be self-hosted. --- ~2223 stars; complements pyairtable; VENDOR (Airtable) official JavaScript client for the Airtable REST API (PAT/OAuth). ToS-clean and authoritative for Node/browser. --- # ALwrity > Updated 2026-09-03 · type: tool · category: content-copywriting · status: active · rev 1 Full-stack content OS w/ GSC SEO; solo-maintained - Open source: yes (MIT) - Self-hostable: yes - Pricing model: free - Best for: Content creators and marketers who want contextual, multi-channel AI content generation with brand consistency across blogs, LinkedIn, YouTube, and podcasts. - Last verified: 2026-09-04 - **Canonical:** https://gtmstacker.com/registry/tool/alwrity/ - **Source:** [github · github.com/AJaySi](https://github.com/AJaySi/AI-Writer) - **Tags:** content-copywriting - **Repository:** https://github.com/AJaySi/AI-Writer ## Is ALwrity open source? Yes — MIT-licensed. ## How much does ALwrity cost? It is free to use. ## Can I self-host ALwrity? Yes — it can be self-hosted. --- Full-stack content OS w/ GSC SEO; solo-maintained --- # Anomalib > Updated 2026-09-03 · type: tool · category: ai-infrastructure · status: active · rev 1 ~6024 stars; via ossinsight.io - Open source: yes (Apache-2.0) - Self-hostable: yes - Pricing model: free - Best for: Researchers, ML engineers, and industrial practitioners building and deploying deep-learning anomaly detection models for visual inspection. - Last verified: 2026-09-04 - **Canonical:** https://gtmstacker.com/registry/tool/anomalib/ - **Source:** [github · github.com/open-edge-platform](https://github.com/open-edge-platform/anomalib) - **Tags:** ai-infrastructure - **Repository:** https://github.com/open-edge-platform/anomalib ## Is Anomalib open source? Yes — Apache-2.0-licensed. ## How much does Anomalib cost? It is free to use. ## Can I self-host Anomalib? Yes — it can be self-hosted. --- ~6024 stars; via ossinsight.io --- # AnythingLLM > Updated 2026-09-03 · type: tool · category: chat-helpdesk · status: active · rev 1 Fully permissive; private doc chat - Open source: yes (MIT) - Self-hostable: yes - Pricing model: free - Best for: Users who want to build a private, fully-featured local-first ChatGPT that they own rather than rent from external services. - Last verified: 2026-09-04 - **Canonical:** https://gtmstacker.com/registry/tool/anythingllm/ - **Source:** [github · github.com/Mintplex-Labs](https://github.com/Mintplex-Labs/anything-llm) - **Tags:** chat-helpdesk, chat-bots-helpdesk - **Repository:** https://github.com/Mintplex-Labs/anything-llm ## Is AnythingLLM open source? Yes — MIT-licensed. ## How much does AnythingLLM cost? It is free to use. ## Can I self-host AnythingLLM? Yes — it can be self-hosted. --- Fully permissive; private doc chat --- # Apache Airflow > Updated 2026-09-03 · type: tool · category: workflow-automation · status: active · rev 1 Industry-standard DAG scheduler - Open source: yes (Apache-2.0) - Self-hostable: yes - Pricing model: free - Best for: Data engineers, ML practitioners, and DevOps teams who need to programmatically author, schedule, and monitor complex data pipelines and workflows. - Last verified: 2026-09-04 - **Canonical:** https://gtmstacker.com/registry/tool/apache-airflow/ - **Source:** [github · github.com/apache](https://github.com/apache/airflow) - **Tags:** workflow-automation - **Repository:** https://github.com/apache/airflow ## Is Apache Airflow open source? Yes — Apache-2.0-licensed. ## How much does Apache Airflow cost? It is free to use. ## Can I self-host Apache Airflow? Yes — it can be self-hosted. --- Industry-standard DAG scheduler --- # Apache Camel K > Updated 2026-09-03 · type: tool · category: integration-orchestration · status: active · rev 1 300+ connectors; K8s; heavyweight - Open source: yes (Apache-2.0) - Self-hostable: yes - Pricing model: free - Best for: Developers building cloud-native, serverless, and microservice integrations who want to run Apache Camel natively on Kubernetes. - Last verified: 2026-09-04 - **Canonical:** https://gtmstacker.com/registry/tool/apache-camel-k/ - **Source:** [github · github.com/apache](https://github.com/apache/camel-k) - **Tags:** integration-orchestration, ipaas-workflow-orchestration-hubs - **Repository:** https://github.com/apache/camel-k ## Is Apache Camel K open source? Yes — Apache-2.0-licensed. ## How much does Apache Camel K cost? It is free to use. ## Can I self-host Apache Camel K? Yes — it can be self-hosted. --- 300+ connectors; K8s; heavyweight --- # Apache ECharts > Updated 2026-09-03 · type: tool · category: analytics-bi · status: active · rev 1 ASF governance; patent grant; markets commercial use - Open source: yes (Apache-2.0) - Self-hostable: yes - Pricing model: free - Best for: Organizations and developers seeking to add intuitive, interactive, and highly customizable charts to their commercial products and web applications. - Last verified: 2026-09-04 - **Canonical:** https://gtmstacker.com/registry/tool/apache-echarts/ - **Source:** [github · github.com/apache](https://github.com/apache/echarts) - **Tags:** analytics-bi, data-visualization - **Repository:** https://github.com/apache/echarts ## Is Apache ECharts open source? Yes — Apache-2.0-licensed. ## How much does Apache ECharts cost? It is free to use. ## Can I self-host Apache ECharts? Yes — it can be self-hosted. --- ASF governance; patent grant; markets commercial use --- # Apache SeaTunnel > Updated 2026-09-03 · type: tool · category: integration-orchestration · status: active · rev 1 OSS alt to Fivetran/Airbyte; ~9543 stars; via ossinsight.io - Open source: yes (Apache-2.0) - Self-hostable: yes - Pricing model: free - Best for: Organizations and enterprises that need to synchronize large volumes of data across diverse sources. - Last verified: 2026-09-04 - **Canonical:** https://gtmstacker.com/registry/tool/apache-seatunnel/ - **Source:** [github · github.com/apache](https://github.com/apache/seatunnel) - **Tags:** integration-orchestration, ipaas-workflow-orchestration-hubs - **Repository:** https://github.com/apache/seatunnel ## Is Apache SeaTunnel open source? Yes — Apache-2.0-licensed. ## How much does Apache SeaTunnel cost? It is free to use. ## Can I self-host Apache SeaTunnel? Yes — it can be self-hosted. --- OSS alt to Fivetran/Airbyte; ~9543 stars; via ossinsight.io --- # Apache Unomi > Updated 2026-09-03 · type: tool · category: marketing-ops · status: active · rev 1 Genuine OSI CDP; ASF-governed; heavy Java - Open source: yes (Apache-2.0) - Self-hostable: yes - Pricing model: free - Best for: Organizations needing a self-hosted backend server for A/B testing, personalization, and user-profile management. - Last verified: 2026-09-04 - **Canonical:** https://gtmstacker.com/registry/tool/apache-unomi/ - **Source:** [github · github.com/apache](https://github.com/apache/unomi) - **Tags:** marketing-ops, marketing-ops-experimentation - **Repository:** https://github.com/apache/unomi ## Is Apache Unomi open source? Yes — Apache-2.0-licensed. ## How much does Apache Unomi cost? It is free to use. ## Can I self-host Apache Unomi? Yes — it can be self-hosted. --- Genuine OSI CDP; ASF-governed; heavy Java --- # AppFlowy > Updated 2026-09-03 · type: tool · category: workflow-automation · status: active · rev 1 OSS alt to Notion; ~75102 stars; AGPL copyleft; via ossinsight.io - Open source: yes (AGPL-3.0) - Self-hostable: yes - Pricing model: free - Best for: Individuals wanting a Notion-like workspace with data security and cross-platform native experience, plus enterprises and developers who want to build customized apps with full data control. - Last verified: 2026-09-04 - **Canonical:** https://gtmstacker.com/registry/tool/appflowy/ - **Source:** [github · github.com/AppFlowy-IO](https://github.com/AppFlowy-IO/AppFlowy) - **Tags:** workflow-automation - **Repository:** https://github.com/AppFlowy-IO/AppFlowy ## Is AppFlowy open source? Yes — AGPL-3.0-licensed. ## How much does AppFlowy cost? It is free to use. ## Can I self-host AppFlowy? Yes — it can be self-hosted. --- OSS alt to Notion; ~75102 stars; AGPL copyleft; via ossinsight.io --- # Aptabase > Updated 2026-09-03 · type: tool · category: analytics-bi · status: active · rev 1 OSS alt to Google Analytics; ~1774 stars; via openalternative.co - Open source: yes (AGPL-3.0) - Self-hostable: yes - Pricing model: freemium - Best for: Developers building mobile, desktop, and web apps who want simple, privacy-first usage analytics. - Last verified: 2026-09-04 - **Canonical:** https://gtmstacker.com/registry/tool/aptabase/ - **Source:** [github · github.com/aptabase](https://github.com/aptabase/aptabase) - **Tags:** analytics-bi - **Repository:** https://github.com/aptabase/aptabase ## Is Aptabase open source? Yes — AGPL-3.0-licensed. ## How much does Aptabase cost? It has a free tier plus paid plans. ## Can I self-host Aptabase? Yes — it can be self-hosted. --- OSS alt to Google Analytics; ~1774 stars; via openalternative.co --- # Astro > Updated 2026-09-03 · type: tool · category: website-cms · status: active · rev 1 GATE PASS; modern content framework - Open source: yes (MIT) - Self-hostable: yes - Pricing model: free - Best for: Developers building content-driven websites who want a fast, modern web framework with strong developer experience. - Last verified: 2026-09-04 - **Canonical:** https://gtmstacker.com/registry/tool/astro/ - **Source:** [github · github.com/withastro](https://github.com/withastro/astro) - **Tags:** website-cms, website-builders-cms - **Repository:** https://github.com/withastro/astro ## Is Astro open source? Yes — MIT-licensed. ## How much does Astro cost? It is free to use. ## Can I self-host Astro? Yes — it can be self-hosted. --- GATE PASS; modern content framework --- # Async PRAW > Updated 2026-09-03 · type: tool · category: social-community · status: active · rev 1 ~154 stars; complements PRAW, redditwarp; aiohttp-based async twin of PRAW; same OAuth2 sanctioned Reddit API and rate-limit compliance. ToS-clean official… - Open source: yes (BSD-2-Clause) - Self-hostable: yes - Pricing model: free - Best for: Python developers who need simple asynchronous programmatic access to Reddit's API. - Last verified: 2026-09-04 - **Canonical:** https://gtmstacker.com/registry/tool/async-praw/ - **Source:** [github · github.com/praw-dev](https://github.com/praw-dev/asyncpraw) - **Tags:** social-community, social-microblogging-communities - **Repository:** https://github.com/praw-dev/asyncpraw ## Is Async PRAW open source? Yes — BSD-2-Clause-licensed. ## How much does Async PRAW cost? It is free to use. ## Can I self-host Async PRAW? Yes — it can be self-hosted. --- ~154 stars; complements PRAW, redditwarp; aiohttp-based async twin of PRAW; same OAuth2 sanctioned Reddit API and rate-limit compliance. ToS-clean official approach for asyncio workloads. --- # Atomic CRM > Updated 2026-09-03 · type: tool · category: crm-sales · status: active · rev 1 OSS alt to Attio; ~1192 stars; via openalternative.co - Open source: yes (MIT) - Self-hostable: yes - Pricing model: free - Best for: Businesses and organizations wanting a customizable, self-hosted CRM to manage contacts, sales pipelines, and customer interactions. - Last verified: 2026-09-04 - **Canonical:** https://gtmstacker.com/registry/tool/atomic-crm/ - **Source:** [github · github.com/marmelab](https://github.com/marmelab/atomic-crm) - **Tags:** crm-sales - **Repository:** https://github.com/marmelab/atomic-crm ## Is Atomic CRM open source? Yes — MIT-licensed. ## How much does Atomic CRM cost? It is free to use. ## Can I self-host Atomic CRM? Yes — it can be self-hosted. --- OSS alt to Attio; ~1192 stars; via openalternative.co --- # atproto (python-sdk) > Updated 2026-09-03 · type: tool · category: social-community · status: active · rev 1 ~654 stars; complements skyware-js/bot, mattn/bsky; App-password / OAuth session against the open AT Protocol (XRPC), auto-generated from official lexicons;… - Open source: yes (MIT) - Self-hostable: yes - Pricing model: free - Best for: Developers building Python applications on the AT Protocol and Bluesky needing sync and async clients with type hints. - Last verified: 2026-09-04 - **Canonical:** https://gtmstacker.com/registry/tool/atproto-python-sdk/ - **Source:** [github · github.com/MarshalX](https://github.com/MarshalX/atproto) - **Tags:** social-community, social-microblogging-communities - **Repository:** https://github.com/MarshalX/atproto ## Is atproto (python-sdk) open source? Yes — MIT-licensed. ## How much does atproto (python-sdk) cost? It is free to use. ## Can I self-host atproto (python-sdk)? Yes — it can be self-hosted. --- ~654 stars; complements skyware-js/bot, mattn/bsky; App-password / OAuth session against the open AT Protocol (XRPC), auto-generated from official lexicons; sync+async. Open protocol — no ToS/ban risk; PDS-agnostic. De-facto Python SDK for Bluesky. --- # AtroCore > Updated 2026-09-03 · type: tool · category: marketing-ops · status: active · rev 1 Most-maintained GPL; DAM one module - Open source: yes (GPLv3) - Self-hostable: yes - Pricing model: freemium - Best for: Organizations needing to unify and manage data of any type across the organization from a single platform. - Last verified: 2026-09-04 - **Canonical:** https://gtmstacker.com/registry/tool/atrocore/ - **Source:** [github · github.com/atrocore](https://github.com/atrocore/atrocore) - **Tags:** marketing-ops, dam-creative-ops - **Repository:** https://github.com/atrocore/atrocore ## Is AtroCore open source? Yes — GPLv3-licensed. ## How much does AtroCore cost? It has a free tier plus paid plans. ## Can I self-host AtroCore? Yes — it can be self-hosted. --- Most-maintained GPL; DAM one module --- # Axolotl > Updated 2026-09-03 · type: tool · category: ai-infrastructure · status: active · rev 1 Default-on telemetry (opt-out); cutting-edge methods - Open source: yes (Apache-2.0) - Self-hostable: yes - Pricing model: free - Best for: ML practitioners who want to streamline post-training and fine-tuning of large language models through a configuration-driven approach. - Last verified: 2026-09-04 - **Canonical:** https://gtmstacker.com/registry/tool/axolotl/ - **Source:** [github · github.com/axolotl-ai-cloud](https://github.com/axolotl-ai-cloud/axolotl) - **Tags:** ai-infrastructure - **Repository:** https://github.com/axolotl-ai-cloud/axolotl ## Is Axolotl open source? Yes — Apache-2.0-licensed. ## How much does Axolotl cost? It is free to use. ## Can I self-host Axolotl? Yes — it can be self-hosted. --- Default-on telemetry (opt-out); cutting-edge methods --- # Bento > Updated 2026-09-03 · type: tool · category: integration-orchestration · status: active · rev 1 OSS alt to closed stream processors; the fully-open Benthos; ~2100 stars; complements Benthos/redpanda-data-connect (upstream), Trigger.dev, SeaTunnel (XREF);… - Open source: yes (MIT) - Self-hostable: yes - Pricing model: free - Best for: Data engineers and platform teams that need a high-performance, resilient stream processor connecting various data sources and sinks. - Last verified: 2026-09-04 - **Canonical:** https://gtmstacker.com/registry/tool/bento/ - **Source:** [github · github.com/warpstreamlabs](https://github.com/warpstreamlabs/bento) - **Tags:** integration-orchestration, ipaas-workflow-orchestration-hubs - **Repository:** https://github.com/warpstreamlabs/bento ## Is Bento open source? Yes — MIT-licensed. ## How much does Bento cost? It is free to use. ## Can I self-host Bento? Yes — it can be self-hosted. --- OSS alt to closed stream processors; the fully-open Benthos; ~2100 stars; complements Benthos/redpanda-data-connect (upstream), Trigger.dev, SeaTunnel (XREF); MIT. Community fork of Benthos, created after the original (now redpanda-data/connect) moved to a restrictive source-available license -> Bento is the OSI-open continuation. Config-driven stream pipelines using official service creds. No per-platform ToS flag. --- # Betterlytics > Updated 2026-09-03 · type: tool · category: analytics-bi · status: active · rev 1 OSS alt to Google Analytics; ~172 stars; via openalternative.co - Open source: yes (AGPL-3.0) - Self-hostable: yes - Pricing model: freemium - Best for: Website owners and developers wanting privacy-compliant, cookieless web analytics (GDPR/CCPA-friendly). - Last verified: 2026-09-04 - **Canonical:** https://gtmstacker.com/registry/tool/betterlytics/ - **Source:** [github · github.com/betterlytics](https://github.com/betterlytics/betterlytics) - **Tags:** analytics-bi - **Repository:** https://github.com/betterlytics/betterlytics ## Is Betterlytics open source? Yes — AGPL-3.0-licensed. ## How much does Betterlytics cost? It has a free tier plus paid plans. ## Can I self-host Betterlytics? Yes — it can be self-hosted. --- OSS alt to Google Analytics; ~172 stars; via openalternative.co --- # Bifrost > Updated 2026-09-03 · type: tool · category: ai-infrastructure · status: active · rev 1 OSS alt to LiteLLM; ~7151 stars; via ossinsight.io - Open source: yes (Apache-2.0) - Self-hostable: yes - Pricing model: free - Best for: Teams building AI applications who need a unified, high-performance gateway to manage multiple LLM providers with reliability and failover. - Last verified: 2026-09-04 - **Canonical:** https://gtmstacker.com/registry/tool/bifrost/ - **Source:** [github · github.com/maximhq](https://github.com/maximhq/bifrost) - **Tags:** ai-infrastructure - **Repository:** https://github.com/maximhq/bifrost ## Is Bifrost open source? Yes — Apache-2.0-licensed. ## How much does Bifrost cost? It is free to use. ## Can I self-host Bifrost? Yes — it can be self-hosted. --- OSS alt to LiteLLM; ~7151 stars; via ossinsight.io --- # Billion Mail > Updated 2026-09-03 · type: tool · category: marketing-automation · status: active · rev 1 OSS alt to Mailchimp; ~15393 stars; via openalternative.co - Open source: yes (AGPL-3.0) - Self-hostable: yes - Pricing model: free - Best for: Businesses and individuals who want to run self-hosted email marketing, newsletters, and transactional messaging on their own server. - Last verified: 2026-09-04 - **Canonical:** https://gtmstacker.com/registry/tool/billion-mail/ - **Source:** [github · github.com/aapanel](https://github.com/aapanel/billionmail) - **Tags:** marketing-automation, marketing-automation-email - **Repository:** https://github.com/aapanel/billionmail ## Is Billion Mail open source? Yes — AGPL-3.0-licensed. ## How much does Billion Mail cost? It is free to use. ## Can I self-host Billion Mail? Yes — it can be self-hosted. --- OSS alt to Mailchimp; ~15393 stars; via openalternative.co --- # bolt-python (Slack Bolt) > Updated 2026-09-03 · type: tool · category: chat-helpdesk · status: active · rev 1 ~1300 stars; complements python-slack-sdk; Official Slack Bolt framework (Events API, Socket Mode, slash commands). Auth via bot/app tokens + OAuth. No ToS… - Open source: yes (MIT) - Self-hostable: yes - Pricing model: free - Best for: Developers who want to build Slack apps in Python using the latest Slack platform features. - Last verified: 2026-09-04 - **Canonical:** https://gtmstacker.com/registry/tool/bolt-python-slack-bolt/ - **Source:** [github · github.com/slackapi](https://github.com/slackapi/bolt-python) - **Tags:** chat-helpdesk, messaging-chat-platforms - **Repository:** https://github.com/slackapi/bolt-python ## Is bolt-python (Slack Bolt) open source? Yes — MIT-licensed. ## How much does bolt-python (Slack Bolt) cost? It is free to use. ## Can I self-host bolt-python (Slack Bolt)? Yes — it can be self-hosted. --- ~1300 stars; complements python-slack-sdk; Official Slack Bolt framework (Events API, Socket Mode, slash commands). Auth via bot/app tokens + OAuth. No ToS risk. --- # BrightBean Studio > Updated 2026-09-03 · type: tool · category: seo-research · status: active · rev 1 Unified inbox+sentiment; influencer discovery has NO OSS - Open source: yes (AGPL-3.0) - Self-hostable: yes - Pricing model: free - Best for: Creators, agencies, and SMBs managing multiple social media accounts who prefer ownership over recurring SaaS subscriptions. - Last verified: 2026-09-04 - **Canonical:** https://gtmstacker.com/registry/tool/brightbean-studio/ - **Source:** [github · github.com/brightbeanxyz](https://github.com/brightbeanxyz/brightbean-studio) - **Tags:** seo-research, seo-market-research - **Repository:** https://github.com/brightbeanxyz/brightbean-studio ## Is BrightBean Studio open source? Yes — AGPL-3.0-licensed. ## How much does BrightBean Studio cost? It is free to use. ## Can I self-host BrightBean Studio? Yes — it can be self-hosted. --- Unified inbox+sentiment; influencer discovery has NO OSS --- # Browser Harness > Updated 2026-09-03 · type: tool · category: data-scraping · status: active · rev 1 Pipeline inventory: Stage 5 strong acquisition fallback (fit 8/10) and Stage 2 partial enrichment extractor (fit 6/10). Self-healing harness connects LLMs to… - Open source: yes (MIT) - Self-hostable: yes - Pricing model: freemium - Best for: Developers building LLM agents that need to automate a real browser and have the agents autonomously improve their own helper functions. - Last verified: 2026-09-04 - **Canonical:** https://gtmstacker.com/registry/tool/browser-harness/ - **Source:** [github · github.com/browser-use](https://github.com/browser-use/browser-harness) - **Tags:** data-scraping, data-mining-scraping, generic-web-desktop-automation-engines - **Repository:** https://github.com/browser-use/browser-harness ## Is Browser Harness open source? Yes — MIT-licensed. ## How much does Browser Harness cost? It has a free tier plus paid plans. ## Can I self-host Browser Harness? Yes — it can be self-hosted. --- Pipeline inventory: Stage 5 strong acquisition fallback (fit 8/10) and Stage 2 partial enrichment extractor (fit 6/10). Self-healing harness connects LLMs to a real Chrome browser via CDP/Playwright and writes reusable helpers at runtime; complements Agent Reach/Crawl4AI/Crawlee/Lightpanda; ~16.7k stars. Expected to reduce interactive public-web extraction gaps by roughly 40-60%, but does not supply proprietary firmographic/contact data. CAVEATS: target-site ToS and… --- # browser-use > Updated 2026-09-03 · type: tool · category: data-scraping · status: active · rev 1 Flagship 'make websites accessible for AI agents'; ~108k stars; CDP/Playwright; complements Crawl4AI/Browser Harness/Lightpanda; CAVEAT target-site ToS +… - Open source: yes (MIT) - Self-hostable: yes - Pricing model: freemium - Best for: Developers and AI agents that need to automate or control a web browser programmatically or via natural language. - Last verified: 2026-09-04 - **Canonical:** https://gtmstacker.com/registry/tool/browser-use/ - **Source:** [github · github.com/browser-use](https://github.com/browser-use/browser-use) - **Tags:** data-scraping, data-mining-scraping, generic-web-desktop-automation-engines - **Repository:** https://github.com/browser-use/browser-use ## Is browser-use open source? Yes — MIT-licensed. ## How much does browser-use cost? It has a free tier plus paid plans. ## Can I self-host browser-use? Yes — it can be self-hosted. --- Flagship 'make websites accessible for AI agents'; ~108k stars; CDP/Playwright; complements Crawl4AI/Browser Harness/Lightpanda; CAVEAT target-site ToS + agent runtime actions --- # browser-use web-ui > Updated 2026-09-03 · type: tool · category: data-scraping · status: active · rev 1 Web GUI to run browser-use agents; ~16k stars; complements browser-use - Open source: yes (MIT) - Self-hostable: yes - Pricing model: free - Best for: Developers and users who want a web interface to run browser-automation agents that make websites accessible for AI agents. - Last verified: 2026-09-04 - **Canonical:** https://gtmstacker.com/registry/tool/browser-use-web-ui/ - **Source:** [github · github.com/browser-use](https://github.com/browser-use/web-ui) - **Tags:** data-scraping, data-mining-scraping, generic-web-desktop-automation-engines - **Repository:** https://github.com/browser-use/web-ui ## Is browser-use web-ui open source? Yes — MIT-licensed. ## How much does browser-use web-ui cost? It is free to use. ## Can I self-host browser-use web-ui? Yes — it can be self-hosted. --- Web GUI to run browser-use agents; ~16k stars; complements browser-use --- # bsky (mattn) > Updated 2026-09-03 · type: tool · category: social-community · status: active · rev 1 ~454 stars; complements atproto (python-sdk), skyware-js/bot; Go CLI over the open AT Protocol using app-password auth. Substituted for the ambiguous… - Open source: yes (MIT) - Self-hostable: yes - Pricing model: free - Best for: Command-line users (and AI assistants via MCP) who want a terminal interface to the Bluesky social network. - Last verified: 2026-09-04 - **Canonical:** https://gtmstacker.com/registry/tool/bsky-mattn/ - **Source:** [github · github.com/mattn](https://github.com/mattn/bsky) - **Tags:** social-community, social-microblogging-communities - **Repository:** https://github.com/mattn/bsky ## Is bsky (mattn) open source? Yes — MIT-licensed. ## How much does bsky (mattn) cost? It is free to use. ## Can I self-host bsky (mattn)? Yes — it can be self-hosted. --- ~454 stars; complements atproto (python-sdk), skyware-js/bot; Go CLI over the open AT Protocol using app-password auth. Substituted for the ambiguous 'bsky-cli' name (several exist); this is the most-adopted active CLI. Open protocol — no ban/ToS risk. --- # BusinessDirectory > Updated 2026-09-03 · type: tool · category: product-discovery · status: active · rev 1 Modern Next.js; no monetization/claim; citation-mgmt has NO OSS - Open source: yes (MIT) - Self-hostable: yes - Pricing model: free - Best for: Business-directory operators and developers building customizable, searchable platforms for local business listings. - Last verified: 2026-09-04 - **Canonical:** https://gtmstacker.com/registry/tool/businessdirectory/ - **Source:** [github · github.com/chamuditha4](https://github.com/chamuditha4/BusinessDirectory) - **Tags:** product-discovery, app-product-discovery - **Repository:** https://github.com/chamuditha4/BusinessDirectory ## Is BusinessDirectory open source? Yes — MIT-licensed. ## How much does BusinessDirectory cost? It is free to use. ## Can I self-host BusinessDirectory? Yes — it can be self-hosted. --- Modern Next.js; no monetization/claim; citation-mgmt has NO OSS --- # caldav (python-caldav) > Updated 2026-09-03 · type: tool · category: meetings-scheduling · status: active · rev 1 ~411 stars; complements vdirsyncer, khal; Open-protocol CalDAV client (works with Nextcloud, iCloud, Google via CalDAV). Auth via basic/app-password/OAuth per… - Open source: yes (GPL-3.0 / Apache-2.0 (dual)) - Self-hostable: yes - Pricing model: free - Best for: Python developers who need to programmatically interact with CalDAV servers to manage calendars and events. - Last verified: 2026-09-04 - **Canonical:** https://gtmstacker.com/registry/tool/caldav-python-caldav/ - **Source:** [github · github.com/python-caldav](https://github.com/python-caldav/caldav) - **Tags:** meetings-scheduling, calendar-scheduling - **Repository:** https://github.com/python-caldav/caldav ## Is caldav (python-caldav) open source? Yes — GPL-3.0 / Apache-2.0 (dual)-licensed. ## How much does caldav (python-caldav) cost? It is free to use. ## Can I self-host caldav (python-caldav)? Yes — it can be self-hosted. --- ~411 stars; complements vdirsyncer, khal; Open-protocol CalDAV client (works with Nextcloud, iCloud, Google via CalDAV). Auth via basic/app-password/OAuth per server. Open standard — no ToS/ban risk. Dual GPL-3.0/Apache-2.0. --- # CAMEL > Updated 2026-09-03 · type: tool · category: ai-infrastructure · status: active · rev 1 OSS alt to CrewAI; ~17562 stars; via ossinsight.io - Open source: yes (Apache-2.0) - Self-hostable: yes - Pricing model: free - Best for: Researchers and developers building multi-agent AI systems to study agent scaling laws, behavior, and emergent capabilities. - Last verified: 2026-09-04 - **Canonical:** https://gtmstacker.com/registry/tool/camel/ - **Source:** [github · github.com/camel-ai](https://github.com/camel-ai/camel) - **Tags:** ai-infrastructure - **Repository:** https://github.com/camel-ai/camel ## Is CAMEL open source? Yes — Apache-2.0-licensed. ## How much does CAMEL cost? It is free to use. ## Can I self-host CAMEL? Yes — it can be self-hosted. --- OSS alt to CrewAI; ~17562 stars; via ossinsight.io --- # cdp-use > Updated 2026-09-03 · type: tool · category: data-scraping · status: active · rev 1 Pure Chrome DevTools Protocol, type-safe in Python; browser-automation primitive; ~308 stars - Open source: yes (MIT) - Self-hostable: yes - Pricing model: free - Best for: Developers building browser-automation tools who need type-safe Python bindings for the Chrome DevTools Protocol. - Last verified: 2026-09-04 - **Canonical:** https://gtmstacker.com/registry/tool/cdp-use/ - **Source:** [github · github.com/browser-use](https://github.com/browser-use/cdp-use) - **Tags:** data-scraping, data-mining-scraping - **Repository:** https://github.com/browser-use/cdp-use ## Is cdp-use open source? Yes — MIT-licensed. ## How much does cdp-use cost? It is free to use. ## Can I self-host cdp-use? Yes — it can be self-hosted. --- Pure Chrome DevTools Protocol, type-safe in Python; browser-automation primitive; ~308 stars --- # Chroma > Updated 2026-09-03 · type: tool · category: ai-infrastructure · status: active · rev 1 OSS alt to Qdrant; ~28984 stars; via ossinsight.io - Open source: yes (Apache-2.0) - Self-hostable: yes - Pricing model: freemium - Best for: Developers and AI engineers building applications that need vector search and embedding storage. - Last verified: 2026-09-04 - **Canonical:** https://gtmstacker.com/registry/tool/chroma/ - **Source:** [github · github.com/chroma-core](https://github.com/chroma-core/chroma) - **Tags:** ai-infrastructure - **Repository:** https://github.com/chroma-core/chroma ## Is Chroma open source? Yes — Apache-2.0-licensed. ## How much does Chroma cost? It has a free tier plus paid plans. ## Can I self-host Chroma? Yes — it can be self-hosted. --- OSS alt to Qdrant; ~28984 stars; via ossinsight.io --- # CLI-Anything > Updated 2026-09-03 · type: tool · category: mcp-agents · status: active · rev 1 Framework and registry for making existing software agent-native through structured CLIs; seven-phase harness generator, CLI-Hub package manager, JSON output,… - Open source: yes (Apache-2.0) - Self-hostable: yes - Pricing model: free - Best for: Developers who want to transform professional software into agent-native command-line tools for AI agents to use. - Last verified: 2026-09-04 - **Canonical:** https://gtmstacker.com/registry/tool/cli-anything/ - **Source:** [github · github.com/HKUDS](https://github.com/HKUDS/CLI-Anything) - **Tags:** mcp-agents, agent-connectors-mcp-servers - **Repository:** https://github.com/HKUDS/CLI-Anything ## Is CLI-Anything open source? Yes — Apache-2.0-licensed. ## How much does CLI-Anything cost? It is free to use. ## Can I self-host CLI-Anything? Yes — it can be self-hosted. --- Framework and registry for making existing software agent-native through structured CLIs; seven-phase harness generator, CLI-Hub package manager, JSON output, tests, SKILL.md generation, and maintained harnesses for creative, productivity, engineering, GIS, media, and developer applications; ~47.6k stars; generated CLIs execute the permissions of their wrapped software — review before agent use --- # CocoIndex > Updated 2026-09-03 · type: tool · category: ai-infrastructure · status: active · rev 1 OSS alt to Pipedream; ~11205 stars; via openalternative.co - Open source: yes (Apache-2.0) - Self-hostable: yes - Pricing model: free - Best for: Data engineers and AI developers building RAG systems and AI agents that need continuously fresh, incremental data pipelines. - Last verified: 2026-09-04 - **Canonical:** https://gtmstacker.com/registry/tool/cocoindex/ - **Source:** [github · github.com/cocoindex-io](https://github.com/cocoindex-io/cocoindex) - **Tags:** ai-infrastructure - **Repository:** https://github.com/cocoindex-io/cocoindex ## Is CocoIndex open source? Yes — Apache-2.0-licensed. ## How much does CocoIndex cost? It is free to use. ## Can I self-host CocoIndex? Yes — it can be self-hosted. --- OSS alt to Pipedream; ~11205 stars; via openalternative.co --- # Cognee > Updated 2026-09-03 · type: tool · category: ai-infrastructure · status: active · rev 1 OSS alt to LlamaIndex; ~29874 stars; via ossinsight.io - Open source: yes (Apache-2.0) - Self-hostable: yes - Pricing model: free - Best for: Developers building AI agent systems that need persistent long-term memory and knowledge across sessions. - Last verified: 2026-09-04 - **Canonical:** https://gtmstacker.com/registry/tool/cognee/ - **Source:** [github · github.com/topoteretes](https://github.com/topoteretes/cognee) - **Tags:** ai-infrastructure - **Repository:** https://github.com/topoteretes/cognee ## Is Cognee open source? Yes — Apache-2.0-licensed. ## How much does Cognee cost? It is free to use. ## Can I self-host Cognee? Yes — it can be self-hosted. --- OSS alt to LlamaIndex; ~29874 stars; via ossinsight.io --- # Composio > Updated 2026-09-03 · type: tool · category: mcp-agents · status: active · rev 1 OSS alt to Zapier-for-agents, proprietary tool platforms; ~29600 stars; complements ACI.dev, Nango, Pipedream, MCP servers; Root LICENSE is MIT (some… - Open source: yes (MIT (Elastic-2.0 on some server dirs)) - Self-hostable: yes - Pricing model: free - Best for: Developers building AI agents that turn intent into action across frameworks like OpenAI, Anthropic, and LangChain. - Last verified: 2026-09-04 - **Canonical:** https://gtmstacker.com/registry/tool/composio/ - **Source:** [github · github.com/ComposioHQ](https://github.com/ComposioHQ/composio) - **Tags:** mcp-agents, agent-connectors-mcp-servers - **Repository:** https://github.com/ComposioHQ/composio ## Is Composio open source? Yes — MIT (Elastic-2.0 on some server dirs)-licensed. ## How much does Composio cost? It is free to use. ## Can I self-host Composio? Yes — it can be self-hosted. --- OSS alt to Zapier-for-agents, proprietary tool platforms; ~29600 stars; complements ACI.dev, Nango, Pipedream, MCP servers; Root LICENSE is MIT (some managed-server subdirectories carry Elastic-2.0). Handles OAuth/managed-auth to 250+ apps and exposes them as agent tools/MCP; uses each app's official credentials -> ethical_risk empty. Cloud offering is separate. --- # Coneshare > Updated 2026-09-03 · type: tool · category: documents-esign · status: active · rev 1 Dataroom overlay; early-stage; digital-sales-room reading has NO OSS - Open source: yes (MIT) - Self-hostable: yes - Pricing model: free - Best for: Teams that share sensitive files externally and need self-hosted document analytics with read receipts and engagement tracking. - Last verified: 2026-09-04 - **Canonical:** https://gtmstacker.com/registry/tool/coneshare/ - **Source:** [github · github.com/coneshare](https://github.com/coneshare/coneshare) - **Tags:** documents-esign, documents-e-sign-deal-rooms - **Repository:** https://github.com/coneshare/coneshare ## Is Coneshare open source? Yes — MIT-licensed. ## How much does Coneshare cost? It is free to use. ## Can I self-host Coneshare? Yes — it can be self-hosted. --- Dataroom overlay; early-stage; digital-sales-room reading has NO OSS --- # Contentport > Updated 2026-09-03 · type: tool · category: content-copywriting · status: active · rev 1 OSS alt to Post Bridge; ~761 stars; via openalternative.co - Open source: yes (AGPL-3.0) - Self-hostable: yes - Pricing model: freemium - Best for: Technical founders who create online content, per the README's 'open-source content platform for technical founders' (a Pro plan/paywall is referenced). - Last verified: 2026-09-04 - **Canonical:** https://gtmstacker.com/registry/tool/contentport/ - **Source:** [github · github.com/joschan21](https://github.com/joschan21/contentport) - **Tags:** content-copywriting - **Repository:** https://github.com/joschan21/contentport ## Is Contentport open source? Yes — AGPL-3.0-licensed. ## How much does Contentport cost? It has a free tier plus paid plans. ## Can I self-host Contentport? Yes — it can be self-hosted. --- OSS alt to Post Bridge; ~761 stars; via openalternative.co --- # Cossistant > Updated 2026-09-03 · type: tool · category: chat-helpdesk · status: active · rev 1 OSS alt to Intercom; ~710 stars; via openalternative.co - Open source: yes (AGPL-3.0) - Self-hostable: yes - Best for: Developers building React applications and SaaS startups who need a flexible, customizable open-source chat support widget. - Last verified: 2026-09-04 - **Canonical:** https://gtmstacker.com/registry/tool/cossistant/ - **Source:** [github · github.com/cossistantcom](https://github.com/cossistantcom/cossistant) - **Tags:** chat-helpdesk, chat-bots-helpdesk - **Repository:** https://github.com/cossistantcom/cossistant ## Is Cossistant open source? Yes — AGPL-3.0-licensed. ## How much does Cossistant cost? It is open source — self-hosting is free; you pay only for your own infrastructure. ## Can I self-host Cossistant? Yes — it can be self-hosted. --- OSS alt to Intercom; ~710 stars; via openalternative.co --- # Crawl4AI > Updated 2026-09-03 · type: tool · category: data-scraping · status: active · rev 1 OSS alt to Browserbase; ~77347 stars; via openalternative.co - Open source: yes (Apache-2.0) - Self-hostable: yes - Pricing model: freemium - Best for: Developers building data pipelines, AI agents, and RAG systems that need structured web-data extraction. - Last verified: 2026-09-04 - **Canonical:** https://gtmstacker.com/registry/tool/crawl4ai/ - **Source:** [github · github.com/unclecode](https://github.com/unclecode/crawl4ai) - **Tags:** data-scraping, data-mining-scraping - **Repository:** https://github.com/unclecode/crawl4ai ## Is Crawl4AI open source? Yes — Apache-2.0-licensed. ## How much does Crawl4AI cost? It has a free tier plus paid plans. ## Can I self-host Crawl4AI? Yes — it can be self-hosted. --- OSS alt to Browserbase; ~77347 stars; via openalternative.co --- # Crawlee > Updated 2026-09-03 · type: tool · category: data-scraping · status: active · rev 1 Generic scraping/browser-automation library - Open source: yes (Apache-2.0) - Self-hostable: yes - Pricing model: free - Best for: Node.js developers building reliable web scrapers and browser-automation tools. - Last verified: 2026-09-04 - **Canonical:** https://gtmstacker.com/registry/tool/crawlee/ - **Source:** [github · github.com/apify](https://github.com/apify/crawlee) - **Tags:** data-scraping, prospecting-enrichment, data-mining-scraping - **Repository:** https://github.com/apify/crawlee ## Is Crawlee open source? Yes — Apache-2.0-licensed. ## How much does Crawlee cost? It is free to use. ## Can I self-host Crawlee? Yes — it can be self-hosted. --- Generic scraping/browser-automation library --- # CrewAI > Updated 2026-09-03 · type: tool · category: ai-infrastructure · status: active · rev 1 Highest cadence; zero advisories - Open source: yes (MIT) - Self-hostable: yes - Pricing model: freemium - Best for: Developers and teams building multi-agent AI automation systems with specialized agents, tool use, and production-grade workflows. - Last verified: 2026-09-04 - **Canonical:** https://gtmstacker.com/registry/tool/crewai/ - **Source:** [github · github.com/crewAIInc](https://github.com/crewAIInc/crewAI) - **Tags:** ai-infrastructure - **Repository:** https://github.com/crewAIInc/crewAI ## Is CrewAI open source? Yes — MIT-licensed. ## How much does CrewAI cost? It has a free tier plus paid plans. ## Can I self-host CrewAI? Yes — it can be self-hosted. --- Highest cadence; zero advisories --- # crowd.dev > Updated 2026-09-03 · type: tool · category: seo-research · status: active · rev 1 Community CDP; Orbit/Common Room alt; LF-owned - Open source: yes (Apache-2.0) - Self-hostable: yes - Best for: Organizations seeking to identify key contributors and organizations within their open-source communities. - Last verified: 2026-09-04 - **Canonical:** https://gtmstacker.com/registry/tool/crowddev/ - **Source:** [github · github.com/CrowdDotDev](https://github.com/CrowdDotDev/crowd.dev) - **Tags:** seo-research, seo-market-research - **Repository:** https://github.com/CrowdDotDev/crowd.dev ## Is crowd.dev open source? Yes — Apache-2.0-licensed. ## How much does crowd.dev cost? It is open source — self-hosting is free; you pay only for your own infrastructure. ## Can I self-host crowd.dev? Yes — it can be self-hosted. --- Community CDP; Orbit/Common Room alt; LF-owned --- # cua (Computer-Use Agents) > Updated 2026-09-03 · type: tool · category: workflow-automation · status: active · rev 1 OSS alt to proprietary computer-use sandboxes; ~21100 stars; complements macOS-use (XREF), self-operating-computer, Open Interpreter; MIT. NOT the same as… - Open source: yes (MIT) - Self-hostable: yes - Pricing model: free - Best for: Developers and AI researchers building computer-use agents who need cross-platform automation, VM management, and benchmarking tools. - Last verified: 2026-09-04 - **Canonical:** https://gtmstacker.com/registry/tool/cua-computer-use-agents/ - **Source:** [github · github.com/trycua](https://github.com/trycua/cua) - **Tags:** workflow-automation, generic-web-desktop-automation-engines - **Repository:** https://github.com/trycua/cua ## Is cua (Computer-Use Agents) open source? Yes — MIT-licensed. ## How much does cua (Computer-Use Agents) cost? It is free to use. ## Can I self-host cua (Computer-Use Agents)? Yes — it can be self-hosted. --- OSS alt to proprietary computer-use sandboxes; ~21100 stars; complements macOS-use (XREF), self-operating-computer, Open Interpreter; MIT. NOT the same as XREF macOS-use: this is the broader trycua/cua project (Computer/Lume/Lumier + cross-OS agent fleets & benchmarks) with sandboxed VMs. Sandboxing is the intended safety boundary for computer-use. No per-platform ToS flag. --- # Cube > Updated 2026-09-03 · type: tool · category: analytics-bi · status: active · rev 1 De-facto OSS semantic layer; not end-user UI - Open source: yes (Apache-2.0 core / MIT client) - Self-hostable: yes - Pricing model: freemium - Best for: Organizations building custom or embedded analytics experiences or AI agents that need a governed semantic layer over their own infrastructure. - Last verified: 2026-09-04 - **Canonical:** https://gtmstacker.com/registry/tool/cube/ - **Source:** [github · github.com/cube-js](https://github.com/cube-js/cube) - **Tags:** analytics-bi - **Repository:** https://github.com/cube-js/cube ## Is Cube open source? Yes — Apache-2.0 core / MIT client-licensed. ## How much does Cube cost? It has a free tier plus paid plans. ## Can I self-host Cube? Yes — it can be self-hosted. --- De-facto OSS semantic layer; not end-user UI --- # D3.js > Updated 2026-09-03 · type: tool · category: analytics-bi · status: active · rev 1 Foundational primitive layer; low-level - Open source: yes (ISC) - Self-hostable: yes - Pricing model: free - Best for: Data practitioners and developers creating dynamic, data-driven visualizations using web standards like SVG, Canvas, and HTML. - Last verified: 2026-09-04 - **Canonical:** https://gtmstacker.com/registry/tool/d3js/ - **Source:** [github · github.com/d3](https://github.com/d3/d3) - **Tags:** analytics-bi, data-visualization - **Repository:** https://github.com/d3/d3 ## Is D3.js open source? Yes — ISC-licensed. ## How much does D3.js cost? It is free to use. ## Can I self-host D3.js? Yes — it can be self-hosted. --- Foundational primitive layer; low-level --- # Darts > Updated 2026-09-03 · type: tool · category: data-scraping · status: active · rev 1 ~9487 stars; via ossinsight.io - Open source: yes (Apache-2.0) - Self-hostable: yes - Pricing model: free - Best for: Data scientists and ML practitioners doing user-friendly time-series forecasting and anomaly detection in Python. - Last verified: 2026-09-04 - **Canonical:** https://gtmstacker.com/registry/tool/darts/ - **Source:** [github · github.com/unit8co](https://github.com/unit8co/darts) - **Tags:** data-scraping, data-mining-scraping - **Repository:** https://github.com/unit8co/darts ## Is Darts open source? Yes — Apache-2.0-licensed. ## How much does Darts cost? It is free to use. ## Can I self-host Darts? Yes — it can be self-hosted. --- ~9487 stars; via ossinsight.io --- # Databuddy > Updated 2026-09-03 · type: tool · category: analytics-bi · status: active · rev 1 OSS alt to Google Analytics; ~1118 stars; via openalternative.co - Open source: yes (AGPL-3.0) - Self-hostable: yes - Best for: Teams and organizations seeking a privacy-first, compliance-focused web analytics platform. - Last verified: 2026-09-04 - **Canonical:** https://gtmstacker.com/registry/tool/databuddy/ - **Source:** [github · github.com/databuddy-analytics](https://github.com/databuddy-analytics/databuddy) - **Tags:** analytics-bi - **Repository:** https://github.com/databuddy-analytics/databuddy ## Is Databuddy open source? Yes — AGPL-3.0-licensed. ## How much does Databuddy cost? It is open source — self-hosting is free; you pay only for your own infrastructure. ## Can I self-host Databuddy? Yes — it can be self-hosted. --- OSS alt to Google Analytics; ~1118 stars; via openalternative.co --- # DataEase > Updated 2026-09-03 · type: tool · category: analytics-bi · status: active · rev 1 OSS alt to Tableau/Power BI; ~24303 stars; via ossinsight.io - Open source: yes (GPL-3.0) - Self-hostable: yes - Pricing model: free - Best for: Users needing an open-source BI / data-visualization tool as an alternative to Tableau. - Last verified: 2026-09-04 - **Canonical:** https://gtmstacker.com/registry/tool/dataease/ - **Source:** [github · github.com/dataease](https://github.com/dataease/dataease) - **Tags:** analytics-bi - **Repository:** https://github.com/dataease/dataease ## Is DataEase open source? Yes — GPL-3.0-licensed. ## How much does DataEase cost? It is free to use. ## Can I self-host DataEase? Yes — it can be self-hosted. --- OSS alt to Tableau/Power BI; ~24303 stars; via ossinsight.io --- # DataForge > Updated 2026-09-03 · type: tool · category: prospecting-enrichment · status: active · rev 1 Only OSS enrichment w/ open data (US gov registries) - Open source: yes (MIT) - Self-hostable: yes - Pricing model: free - Best for: Businesses and sales teams that want to enrich contact databases locally without enterprise services like Apollo, ZoomInfo, or Clearbit. - Last verified: 2026-09-04 - **Canonical:** https://gtmstacker.com/registry/tool/dataforge/ - **Source:** [github · github.com/Nuclear-Marmalade](https://github.com/Nuclear-Marmalade/dataforge) - **Tags:** prospecting-enrichment - **Repository:** https://github.com/Nuclear-Marmalade/dataforge ## Is DataForge open source? Yes — MIT-licensed. ## How much does DataForge cost? It is free to use. ## Can I self-host DataForge? Yes — it can be self-hosted. --- Only OSS enrichment w/ open data (US gov registries) --- # DataHub > Updated 2026-09-03 · type: tool · category: integration-orchestration · status: active · rev 1 ~12487 stars; via ossinsight.io - Open source: yes (Apache-2.0) - Self-hostable: yes - Pricing model: free - Best for: Data teams and organizations needing centralized metadata management for data discovery, governance, and observability. - Last verified: 2026-09-04 - **Canonical:** https://gtmstacker.com/registry/tool/datahub/ - **Source:** [github · github.com/datahub-project](https://github.com/datahub-project/datahub) - **Tags:** integration-orchestration - **Repository:** https://github.com/datahub-project/datahub ## Is DataHub open source? Yes — Apache-2.0-licensed. ## How much does DataHub cost? It is free to use. ## Can I self-host DataHub? Yes — it can be self-hosted. --- ~12487 stars; via ossinsight.io --- # DB-GPT > Updated 2026-09-03 · type: tool · category: ai-infrastructure · status: active · rev 1 ~19672 stars; via ossinsight.io - Open source: yes (MIT) - Self-hostable: yes - Pricing model: free - Best for: Developers and enterprises building AI-native data products that connect to databases and automate analysis workflows. - Last verified: 2026-09-04 - **Canonical:** https://gtmstacker.com/registry/tool/db-gpt/ - **Source:** [github · github.com/eosphoros-ai](https://github.com/eosphoros-ai/DB-GPT) - **Tags:** ai-infrastructure - **Repository:** https://github.com/eosphoros-ai/DB-GPT ## Is DB-GPT open source? Yes — MIT-licensed. ## How much does DB-GPT cost? It is free to use. ## Can I self-host DB-GPT? Yes — it can be self-hosted. --- ~19672 stars; via ossinsight.io --- # DeepEval > Updated 2026-09-03 · type: tool · category: ai-infrastructure · status: active · rev 1 pytest-for-LLMs (verified) - Open source: yes (Apache-2.0) - Self-hostable: yes - Pricing model: free - Best for: Development teams building LLM apps (agents, RAG pipelines, chatbots) who need to evaluate them end-to-end. - Last verified: 2026-09-04 - **Canonical:** https://gtmstacker.com/registry/tool/deepeval/ - **Source:** [github · github.com/confident-ai](https://github.com/confident-ai/deepeval) - **Tags:** ai-infrastructure - **Repository:** https://github.com/confident-ai/deepeval ## Is DeepEval open source? Yes — Apache-2.0-licensed. ## How much does DeepEval cost? It is free to use. ## Can I self-host DeepEval? Yes — it can be self-hosted. --- pytest-for-LLMs (verified) --- # DevHunt > Updated 2026-09-03 · type: tool · category: product-discovery · status: active · rev 1 Genuine MIT; dev-niche; anti-fraud GitHub-auth voting - Open source: yes (MIT) - Self-hostable: yes - Pricing model: free - Best for: Developers who want to launch, showcase, and discover developer tools. - Last verified: 2026-09-04 - **Canonical:** https://gtmstacker.com/registry/tool/devhunt/ - **Source:** [github · github.com/MarsX-dev](https://github.com/MarsX-dev/devhunt) - **Tags:** product-discovery, app-product-discovery - **Repository:** https://github.com/MarsX-dev/devhunt ## Is DevHunt open source? Yes — MIT-licensed. ## How much does DevHunt cost? It is free to use. ## Can I self-host DevHunt? Yes — it can be self-hosted. --- Genuine MIT; dev-niche; anti-fraud GitHub-auth voting --- # discord.py > Updated 2026-09-03 · type: tool · category: chat-helpdesk · status: active · rev 1 ~16100 stars; complements serenity; Official Discord bot API wrapper. Auth via bot token. No ToS risk for bots (self-botting user accounts IS banned - don't).… - Open source: yes (MIT) - Self-hostable: yes - Pricing model: free - Best for: Python developers building Discord bots and applications with an async-ready API wrapper. - Last verified: 2026-09-04 - **Canonical:** https://gtmstacker.com/registry/tool/discordpy/ - **Source:** [github · github.com/Rapptz](https://github.com/Rapptz/discord.py) - **Tags:** chat-helpdesk, messaging-chat-platforms - **Repository:** https://github.com/Rapptz/discord.py ## Is discord.py open source? Yes — MIT-licensed. ## How much does discord.py cost? It is free to use. ## Can I self-host discord.py? Yes — it can be self-hosted. --- ~16100 stars; complements serenity; Official Discord bot API wrapper. Auth via bot token. No ToS risk for bots (self-botting user accounts IS banned - don't). Proper rate limiting built in.; via ossinsight.io, GitHub cross-ref --- # discourse_api > Updated 2026-09-03 · type: tool · category: social-community · status: active · rev 1 ~304 stars; complements pydiscourse (Python client); Official Discourse (discourse org) Ruby client for the sanctioned API. Auth via admin API key. No ToS/ban… - Open source: yes (MIT) - Self-hostable: yes - Pricing model: free - Best for: Developers building applications that need to consume the Discourse forum API. - Last verified: 2026-09-04 - **Canonical:** https://gtmstacker.com/registry/tool/discourse-api/ - **Source:** [github · github.com/discourse](https://github.com/discourse/discourse_api) - **Tags:** social-community, social-professional-niche - **Repository:** https://github.com/discourse/discourse_api ## Is discourse_api open source? Yes — MIT-licensed. ## How much does discourse_api cost? It is free to use. ## Can I self-host discourse_api? Yes — it can be self-hosted. --- ~304 stars; complements pydiscourse (Python client); Official Discourse (discourse org) Ruby client for the sanctioned API. Auth via admin API key. No ToS/ban risk. --- # Dittofeed > Updated 2026-09-03 · type: tool · category: marketing-automation · status: active · rev 1 OSS alt to Customer.io; ~2888 stars; via openalternative.co - Open source: yes (MIT) - Self-hostable: yes - Pricing model: free - Best for: Organizations wanting a self-hostable open-source alternative to Customer.io/Segment for omni-channel customer messaging and engagement automation. - Last verified: 2026-09-04 - **Canonical:** https://gtmstacker.com/registry/tool/dittofeed/ - **Source:** [github · github.com/dittofeed](https://github.com/dittofeed/dittofeed) - **Tags:** marketing-automation, marketing-automation-email - **Repository:** https://github.com/dittofeed/dittofeed ## Is Dittofeed open source? Yes — MIT-licensed. ## How much does Dittofeed cost? It is free to use. ## Can I self-host Dittofeed? Yes — it can be self-hosted. --- OSS alt to Customer.io; ~2888 stars; via openalternative.co --- # dkron > Updated 2026-09-03 · type: tool · category: workflow-automation · status: active · rev 1 Distributed cron; cadence cooled - Open source: yes (LGPL-3.0) - Self-hostable: yes - Pricing model: free - Best for: Infrastructure and operations teams needing to run scheduled commands reliably across a server cluster. - Last verified: 2026-09-04 - **Canonical:** https://gtmstacker.com/registry/tool/dkron/ - **Source:** [github · github.com/distribworks](https://github.com/distribworks/dkron) - **Tags:** workflow-automation - **Repository:** https://github.com/distribworks/dkron ## Is dkron open source? Yes — LGPL-3.0-licensed. ## How much does dkron cost? It is free to use. ## Can I self-host dkron? Yes — it can be self-hosted. --- Distributed cron; cadence cooled --- # dlt > Updated 2026-09-03 · type: tool · category: data-scraping · status: active · rev 1 Pure OSI Python EL library; schema inference - Open source: yes (Apache-2.0) - Self-hostable: yes - Pricing model: free - Best for: Data engineers and Python developers automating data extraction and loading across sources and destinations. - Last verified: 2026-09-04 - **Canonical:** https://gtmstacker.com/registry/tool/dlt/ - **Source:** [github · github.com/dlt-hub](https://github.com/dlt-hub/dlt) - **Tags:** data-scraping, data-mining-scraping - **Repository:** https://github.com/dlt-hub/dlt ## Is dlt open source? Yes — Apache-2.0-licensed. ## How much does dlt cost? It is free to use. ## Can I self-host dlt? Yes — it can be self-hosted. --- Pure OSI Python EL library; schema inference --- # Documenso > Updated 2026-09-03 · type: tool · category: documents-esign · status: active · rev 1 Modern DocuSign alt; no external PRs - Open source: yes (AGPL-3.0) - Self-hostable: yes - Pricing model: freemium - Best for: Organizations and individuals seeking an open, self-hostable and auditable alternative to proprietary document-signing services like DocuSign. - Last verified: 2026-09-04 - **Canonical:** https://gtmstacker.com/registry/tool/documenso/ - **Source:** [github · github.com/documenso](https://github.com/documenso/documenso) - **Tags:** documents-esign, documents-e-sign-deal-rooms - **Repository:** https://github.com/documenso/documenso ## Is Documenso open source? Yes — AGPL-3.0-licensed. ## How much does Documenso cost? It has a free tier plus paid plans. ## Can I self-host Documenso? Yes — it can be self-hosted. --- Modern DocuSign alt; no external PRs --- # DVC > Updated 2026-09-03 · type: tool · category: ai-infrastructure · status: active · rev 1 OSS alt to proprietary MLOps asset stores; ~15800 stars; complements git-lfs, ComfyUI workflow files; Closest fit for versioning large generated assets/models… - Open source: yes (Apache-2.0) - Self-hostable: yes - Pricing model: free - Best for: Machine learning practitioners who need to version data, track experiments, and build reproducible ML projects. - Last verified: 2026-09-04 - **Canonical:** https://gtmstacker.com/registry/tool/dvc/ - **Source:** [github · github.com/iterative](https://github.com/iterative/dvc) - **Tags:** ai-infrastructure, content-factory-orchestration - **Repository:** https://github.com/iterative/dvc ## Is DVC open source? Yes — Apache-2.0-licensed. ## How much does DVC cost? It is free to use. ## Can I self-host DVC? Yes — it can be self-hosted. --- OSS alt to proprietary MLOps asset stores; ~15800 stars; complements git-lfs, ComfyUI workflow files; Closest fit for versioning large generated assets/models alongside Git. Branch is otherwise thin — no purpose-built gen-asset versioning product exists. No model. --- # Easy!Appointments > Updated 2026-09-03 · type: tool · category: meetings-scheduling · status: active · rev 1 Longest-lived booking; dated PHP; no routing - Open source: yes (GPL-3.0) - Self-hostable: yes - Pricing model: freemium - Best for: Businesses and individuals needing customizable, self-hosted appointment scheduling with full data control. - Last verified: 2026-09-04 - **Canonical:** https://gtmstacker.com/registry/tool/easyappointments/ - **Source:** [github · github.com/alextselegidis](https://github.com/alextselegidis/easyappointments) - **Tags:** meetings-scheduling - **Repository:** https://github.com/alextselegidis/easyappointments ## Is Easy!Appointments open source? Yes — GPL-3.0-licensed. ## How much does Easy!Appointments cost? It has a free tier plus paid plans. ## Can I self-host Easy!Appointments? Yes — it can be self-hosted. --- Longest-lived booking; dated PHP; no routing --- # enthec/webappanalyzer > Updated 2026-09-03 · type: tool · category: prospecting-enrichment · status: active · rev 1 Technographic ruleset (post-Wappalyzer-closure) - Open source: yes (GPL-3.0) - Self-hostable: yes - Pricing model: free - Best for: Developers and security professionals who need to identify technologies used on web pages via pattern matching. - Last verified: 2026-09-04 - **Canonical:** https://gtmstacker.com/registry/tool/enthecwebappanalyzer/ - **Source:** [github · github.com/enthec](https://github.com/enthec/webappanalyzer) - **Tags:** prospecting-enrichment - **Repository:** https://github.com/enthec/webappanalyzer ## Is enthec/webappanalyzer open source? Yes — GPL-3.0-licensed. ## How much does enthec/webappanalyzer cost? It is free to use. ## Can I self-host enthec/webappanalyzer? Yes — it can be self-hosted. --- Technographic ruleset (post-Wappalyzer-closure) --- # ERPNext > Updated 2026-09-03 · type: tool · category: crm-sales · status: active · rev 1 OSS alt to SAP/NetSuite; ~37793 stars; broad ERP; CRM is one module; via ossinsight.io - Open source: yes (GPL-3.0) - Self-hostable: yes - Pricing model: free - Best for: Businesses of any size needing a full open-source ERP for invoicing, stock, HR, and daily operations. - Last verified: 2026-09-04 - **Canonical:** https://gtmstacker.com/registry/tool/erpnext/ - **Source:** [github · github.com/frappe](https://github.com/frappe/erpnext) - **Tags:** crm-sales - **Repository:** https://github.com/frappe/erpnext ## Is ERPNext open source? Yes — GPL-3.0-licensed. ## How much does ERPNext cost? It is free to use. ## Can I self-host ERPNext? Yes — it can be self-hosted. --- OSS alt to SAP/NetSuite; ~37793 stars; broad ERP; CRM is one module; via ossinsight.io --- # Ever Gauzy > Updated 2026-09-03 · type: tool · category: crm-sales · status: active · rev 1 OSS alt to Attio; ~4305 stars; via openalternative.co - Open source: yes (AGPL-3.0) - Self-hostable: yes - Pricing model: freemium - Best for: Organizations of any size (from freelancers to enterprises) seeking integrated HR, CRM, ERP, and project/time-management. - Last verified: 2026-09-04 - **Canonical:** https://gtmstacker.com/registry/tool/ever-gauzy/ - **Source:** [github · github.com/ever-co](https://github.com/ever-co/ever-gauzy) - **Tags:** crm-sales - **Repository:** https://github.com/ever-co/ever-gauzy ## Is Ever Gauzy open source? Yes — AGPL-3.0-licensed. ## How much does Ever Gauzy cost? It has a free tier plus paid plans. ## Can I self-host Ever Gauzy? Yes — it can be self-hosted. --- OSS alt to Attio; ~4305 stars; via openalternative.co --- # Fediwall > Updated 2026-09-03 · type: tool · category: seo-research · status: active · rev 1 Only UGC-curation dashboard; Fediverse-only - Open source: yes (AGPL-3.0) - Self-hostable: yes - Pricing model: free - Best for: People wanting to display social media (Mastodon/Fediverse) content on large screens or personal devices, from event organizers to casual users. - Last verified: 2026-09-04 - **Canonical:** https://gtmstacker.com/registry/tool/fediwall/ - **Source:** [github · github.com/defnull](https://github.com/defnull/fediwall) - **Tags:** seo-research, seo-market-research - **Repository:** https://github.com/defnull/fediwall ## Is Fediwall open source? Yes — AGPL-3.0-licensed. ## How much does Fediwall cost? It is free to use. ## Can I self-host Fediwall? Yes — it can be self-hosted. --- Only UGC-curation dashboard; Fediverse-only --- # Fider > Updated 2026-09-03 · type: tool · category: chat-helpdesk · status: active · rev 1 OSS alt to Featurebase; ~4458 stars; via openalternative.co - Open source: yes (AGPL-3.0) - Self-hostable: yes - Pricing model: freemium - Best for: Product teams and organizations collecting customer feedback on feature requests and product improvements. - Last verified: 2026-09-04 - **Canonical:** https://gtmstacker.com/registry/tool/fider/ - **Source:** [github · github.com/getfider](https://github.com/getfider/fider) - **Tags:** chat-helpdesk, chat-bots-helpdesk - **Repository:** https://github.com/getfider/fider ## Is Fider open source? Yes — AGPL-3.0-licensed. ## How much does Fider cost? It has a free tier plus paid plans. ## Can I self-host Fider? Yes — it can be self-hosted. --- OSS alt to Featurebase; ~4458 stars; via openalternative.co --- # Flowable > Updated 2026-09-03 · type: tool · category: workflow-automation · status: active · rev 1 BPMN+CMMN+DMN; JVM - Open source: yes (Apache-2.0) - Self-hostable: yes - Pricing model: free - Best for: Developers, system admins, and business users needing workflow and Business Process Management capabilities. - Last verified: 2026-09-04 - **Canonical:** https://gtmstacker.com/registry/tool/flowable/ - **Source:** [github · github.com/flowable](https://github.com/flowable/flowable-engine) - **Tags:** workflow-automation - **Repository:** https://github.com/flowable/flowable-engine ## Is Flowable open source? Yes — Apache-2.0-licensed. ## How much does Flowable cost? It is free to use. ## Can I self-host Flowable? Yes — it can be self-hosted. --- BPMN+CMMN+DMN; JVM --- # flowsint > Updated 2026-09-03 · type: tool · category: analytics-bi · status: active · rev 1 Visual, extensible graph platform for OSINT link-analysis/investigations (Maltego-style); ~7.5k stars; dual-use OSINT tool - Open source: yes (Apache-2.0) - Self-hostable: yes - Pricing model: free - Best for: Cybersecurity researchers, analysts, journalists, and law enforcement teams conducting lawful OSINT investigations. - Last verified: 2026-09-04 - **Canonical:** https://gtmstacker.com/registry/tool/flowsint/ - **Source:** [github · github.com/reconurge](https://github.com/reconurge/flowsint) - **Tags:** analytics-bi, data-visualization - **Repository:** https://github.com/reconurge/flowsint ## Is flowsint open source? Yes — Apache-2.0-licensed. ## How much does flowsint cost? It is free to use. ## Can I self-host flowsint? Yes — it can be self-hosted. --- Visual, extensible graph platform for OSINT link-analysis/investigations (Maltego-style); ~7.5k stars; dual-use OSINT tool --- # Frappe Builder > Updated 2026-09-03 · type: tool · category: website-cms · status: active · rev 1 OSS alt to Webflow; ~2220 stars; via openalternative.co - Open source: yes (MIT) - Self-hostable: yes - Pricing model: free - Best for: Designers seeking ease and developers seeking customization who want to build websites. - Last verified: 2026-09-04 - **Canonical:** https://gtmstacker.com/registry/tool/frappe-builder/ - **Source:** [github · github.com/frappe](https://github.com/frappe/builder) - **Tags:** website-cms, website-builders-cms - **Repository:** https://github.com/frappe/builder ## Is Frappe Builder open source? Yes — MIT-licensed. ## How much does Frappe Builder cost? It is free to use. ## Can I self-host Frappe Builder? Yes — it can be self-hosted. --- OSS alt to Webflow; ~2220 stars; via openalternative.co --- # Frappe CRM > Updated 2026-09-03 · type: tool · category: crm-sales · status: active · rev 1 OSS alt to Attio; ~3206 stars; via openalternative.co - Open source: yes (AGPL-3.0) - Self-hostable: yes - Pricing model: free - Best for: Modern sales teams and growing organizations needing an open-source CRM for core sales activities. - Last verified: 2026-09-04 - **Canonical:** https://gtmstacker.com/registry/tool/frappe-crm/ - **Source:** [github · github.com/frappe](https://github.com/frappe/crm) - **Tags:** crm-sales - **Repository:** https://github.com/frappe/crm ## Is Frappe CRM open source? Yes — AGPL-3.0-licensed. ## How much does Frappe CRM cost? It is free to use. ## Can I self-host Frappe CRM? Yes — it can be self-hosted. --- OSS alt to Attio; ~3206 stars; via openalternative.co --- # FreeCrawl > Updated 2026-09-03 · type: tool · category: seo-research · status: active · rev 1 Deepest internal-linking; desktop; pre-1.0 - Open source: yes (MIT) - Self-hostable: yes - Pricing model: free - Best for: SEO professionals and auditors who need a fast, fully-local desktop website crawler as an alternative to Screaming Frog. - Last verified: 2026-09-04 - **Canonical:** https://gtmstacker.com/registry/tool/freecrawl/ - **Source:** [github · github.com/kemalai](https://github.com/kemalai/FreeCrawl-SEO-Tool) - **Tags:** seo-research, seo-market-research - **Repository:** https://github.com/kemalai/FreeCrawl-SEO-Tool ## Is FreeCrawl open source? Yes — MIT-licensed. ## How much does FreeCrawl cost? It is free to use. ## Can I self-host FreeCrawl? Yes — it can be self-hosted. --- Deepest internal-linking; desktop; pre-1.0 --- # Freescout > Updated 2026-09-03 · type: tool · category: chat-helpdesk · status: active · rev 1 OSS alt to Zendesk; ~4465 stars; via openalternative.co - Open source: yes (AGPL-3.0) - Self-hostable: yes - Pricing model: free - Best for: Organizations seeking a self-hosted, privacy-respecting help desk comparable to Zendesk or Help Scout. - Last verified: 2026-09-04 - **Canonical:** https://gtmstacker.com/registry/tool/freescout/ - **Source:** [github · github.com/freescout-helpdesk](https://github.com/freescout-helpdesk/freescout) - **Tags:** chat-helpdesk, chat-bots-helpdesk - **Repository:** https://github.com/freescout-helpdesk/freescout ## Is Freescout open source? Yes — AGPL-3.0-licensed. ## How much does Freescout cost? It is free to use. ## Can I self-host Freescout? Yes — it can be self-hosted. --- OSS alt to Zendesk; ~4465 stars; via openalternative.co --- # gcalcli > Updated 2026-09-03 · type: tool · category: meetings-scheduling · status: active · rev 1 ~3800 stars; complements google-api-python-client (official-api); CLI over the sanctioned Google Calendar API. Auth via Google OAuth (own client credentials).… - Open source: yes (MIT) - Self-hostable: yes - Pricing model: free - Best for: Command-line users who want to access their Google Calendar(s) from the terminal. - Last verified: 2026-09-04 - **Canonical:** https://gtmstacker.com/registry/tool/gcalcli/ - **Source:** [github · github.com/insanum](https://github.com/insanum/gcalcli) - **Tags:** meetings-scheduling, calendar-scheduling - **Repository:** https://github.com/insanum/gcalcli ## Is gcalcli open source? Yes — MIT-licensed. ## How much does gcalcli cost? It is free to use. ## Can I self-host gcalcli? Yes — it can be self-hosted. --- ~3800 stars; complements google-api-python-client (official-api); CLI over the sanctioned Google Calendar API. Auth via Google OAuth (own client credentials). No ToS risk. --- # gh (GitHub CLI) > Updated 2026-09-03 · type: tool · category: project-ops · status: active · rev 1 ~45800 stars; complements PyGithub, octokit.js; Official GitHub CLI. Auth via OAuth device flow or PAT. No ToS risk; standard REST rate limits (5000/hr… - Open source: yes (MIT) - Self-hostable: yes - Pricing model: free - Best for: Developers who want to manage GitHub pull requests, issues, and workflows from their terminal. - Last verified: 2026-09-04 - **Canonical:** https://gtmstacker.com/registry/tool/gh-github-cli/ - **Source:** [github · github.com/cli](https://github.com/cli/cli) - **Tags:** project-ops, project-issue-dev-platforms - **Repository:** https://github.com/cli/cli ## Is gh (GitHub CLI) open source? Yes — MIT-licensed. ## How much does gh (GitHub CLI) cost? It is free to use. ## Can I self-host gh (GitHub CLI)? Yes — it can be self-hosted. --- ~45800 stars; complements PyGithub, octokit.js; Official GitHub CLI. Auth via OAuth device flow or PAT. No ToS risk; standard REST rate limits (5000/hr authenticated). --- # Ghost > Updated 2026-09-03 · type: tool · category: website-cms · status: active · rev 1 GATE PASS (trademark limits branding not site resale) - Open source: yes (MIT) - Self-hostable: yes - Pricing model: freemium - Best for: Professional publishers, creators, and organizations wanting independent publishing infrastructure with membership and subscription capabilities. - Last verified: 2026-09-04 - **Canonical:** https://gtmstacker.com/registry/tool/ghost/ - **Source:** [github · github.com/TryGhost](https://github.com/TryGhost/Ghost) - **Tags:** website-cms, website-builders-cms - **Repository:** https://github.com/TryGhost/Ghost ## Is Ghost open source? Yes — MIT-licensed. ## How much does Ghost cost? It has a free tier plus paid plans. ## Can I self-host Ghost? Yes — it can be self-hosted. --- GATE PASS (trademark limits branding not site resale) --- # glab (GitLab CLI) > Updated 2026-09-03 · type: tool · category: project-ops · status: active · rev 1 ~4200 stars; complements python-gitlab; Official GitLab CLI (now under gitlab-org). Auth via PAT/OAuth. No ToS risk. Repo lives on GitLab, not GitHub. - Open source: yes (MIT) - Self-hostable: yes - Pricing model: free - Best for: Developers who work with Git and GitLab and want GitLab operations available in their terminal. - Last verified: 2026-09-04 - **Canonical:** https://gtmstacker.com/registry/tool/glab-gitlab-cli/ - **Source:** [gitlab · gitlab.com/gitlab-org](https://gitlab.com/gitlab-org/cli) - **Tags:** project-ops, project-issue-dev-platforms - **Repository:** https://gitlab.com/gitlab-org/cli ## Is glab (GitLab CLI) open source? Yes — MIT-licensed. ## How much does glab (GitLab CLI) cost? It is free to use. ## Can I self-host glab (GitLab CLI)? Yes — it can be self-hosted. --- ~4200 stars; complements python-gitlab; Official GitLab CLI (now under gitlab-org). Auth via PAT/OAuth. No ToS risk. Repo lives on GitLab, not GitHub. --- # gmailctl > Updated 2026-09-03 · type: tool · category: email-outbound · status: active · rev 1 ~2200 stars; complements google-api-python-client; Uses official Gmail API to sync filters. Auth via OAuth2. Diff-before-apply. No ToS risk. - Open source: yes (MIT) - Self-hostable: yes - Pricing model: free - Best for: Users who manage many Gmail filters and want to treat them declaratively like code instead of using the Gmail web interface. - Last verified: 2026-09-04 - **Canonical:** https://gtmstacker.com/registry/tool/gmailctl/ - **Source:** [github · github.com/mbrt](https://github.com/mbrt/gmailctl) - **Tags:** email-outbound, email-providers-protocols - **Repository:** https://github.com/mbrt/gmailctl ## Is gmailctl open source? Yes — MIT-licensed. ## How much does gmailctl cost? It is free to use. ## Can I self-host gmailctl? Yes — it can be self-hosted. --- ~2200 stars; complements google-api-python-client; Uses official Gmail API to sync filters. Auth via OAuth2. Diff-before-apply. No ToS risk. --- # GoAccess > Updated 2026-09-03 · type: tool · category: analytics-bi · status: active · rev 1 OSS alt to Google Analytics; ~20763 stars; via ossinsight.io - Open source: yes (MIT) - Self-hostable: yes - Pricing model: free - Best for: System administrators, DevOps engineers, and security professionals needing real-time terminal or HTML web-log analysis. - Last verified: 2026-09-04 - **Canonical:** https://gtmstacker.com/registry/tool/goaccess/ - **Source:** [github · github.com/allinurl](https://github.com/allinurl/goaccess) - **Tags:** analytics-bi - **Repository:** https://github.com/allinurl/goaccess ## Is GoAccess open source? Yes — MIT-licensed. ## How much does GoAccess cost? It is free to use. ## Can I self-host GoAccess? Yes — it can be self-hosted. --- OSS alt to Google Analytics; ~20763 stars; via ossinsight.io --- # google-api-python-client (Docs/Drive) > Updated 2026-09-03 · type: tool · category: email-outbound · status: active · rev 1 ~8900 stars; complements gmailctl; Official Google API client (maintenance mode but supported). Gmail API auth via OAuth2. No ToS risk; per-user API quotas. - Open source: yes (Apache-2.0) - Self-hostable: yes - Pricing model: free - Best for: Python developers building applications that integrate with Google's discovery-based APIs. - Last verified: 2026-09-04 - **Canonical:** https://gtmstacker.com/registry/tool/google-api-python-client-docsdrive/ - **Source:** [github · github.com/googleapis](https://github.com/googleapis/google-api-python-client) - **Tags:** email-outbound, email-providers-protocols, social-visual-short-video, productivity-knowledge-bases, calendar-scheduling - **Repository:** https://github.com/googleapis/google-api-python-client ## Is google-api-python-client (Docs/Drive) open source? Yes — Apache-2.0-licensed. ## How much does google-api-python-client (Docs/Drive) cost? It is free to use. ## Can I self-host google-api-python-client (Docs/Drive)? Yes — it can be self-hosted. --- ~8900 stars; complements gmailctl; Official Google API client (maintenance mode but supported). Gmail API auth via OAuth2. No ToS risk; per-user API quotas. --- # Google Workspace CLI > Updated 2026-09-03 · type: tool · category: integration-orchestration · status: active · rev 1 Official one-command CLI for Drive/Gmail/Calendar/Docs; Rust; ~30k stars; scriptable Workspace automation - Open source: yes (Apache-2.0) - Self-hostable: yes - Pricing model: free - Best for: Humans and AI agents who want one CLI to automate all of Google Workspace. - Last verified: 2026-09-04 - **Canonical:** https://gtmstacker.com/registry/tool/google-workspace-cli/ - **Source:** [github · github.com/googleworkspace](https://github.com/googleworkspace/cli) - **Tags:** integration-orchestration, productivity-knowledge-bases - **Repository:** https://github.com/googleworkspace/cli ## Is Google Workspace CLI open source? Yes — Apache-2.0-licensed. ## How much does Google Workspace CLI cost? It is free to use. ## Can I self-host Google Workspace CLI? Yes — it can be self-hosted. --- Official one-command CLI for Drive/Gmail/Calendar/Docs; Rust; ~30k stars; scriptable Workspace automation --- # googlemaps (google-maps-services-python) > Updated 2026-09-03 · type: tool · category: seo-research · status: active · rev 1 ~5000 stars; complements google-maps-scraper (unofficial fallback); Official Google Maps Platform Python client (Geocoding, Places, Directions, Distance… - Open source: yes (Apache-2.0) - Self-hostable: yes - Pricing model: free - Best for: Python developers building applications that need Google Maps geocoding, directions, and related services. - Last verified: 2026-09-04 - **Canonical:** https://gtmstacker.com/registry/tool/googlemaps-google-maps-services-python/ - **Source:** [github · github.com/googlemaps](https://github.com/googlemaps/google-maps-services-python) - **Tags:** seo-research, maps-local-reviews - **Repository:** https://github.com/googlemaps/google-maps-services-python ## Is googlemaps (google-maps-services-python) open source? Yes — Apache-2.0-licensed. ## How much does googlemaps (google-maps-services-python) cost? It is free to use. ## Can I self-host googlemaps (google-maps-services-python)? Yes — it can be self-hosted. --- ~5000 stars; complements google-maps-scraper (unofficial fallback); Official Google Maps Platform Python client (Geocoding, Places, Directions, Distance Matrix). Auth via API key. Sanctioned; no ToS risk; billed per request. --- # Gorse > Updated 2026-09-03 · type: tool · category: product-discovery · status: active · rev 1 Only ready-to-deploy engine; REST API + dashboard - Open source: yes (Apache-2.0) - Self-hostable: yes - Pricing model: free - Best for: Developers and online services wanting to add personalized recommendations to their applications. - Last verified: 2026-09-04 - **Canonical:** https://gtmstacker.com/registry/tool/gorse/ - **Source:** [github · github.com/gorse-io](https://github.com/gorse-io/gorse) - **Tags:** product-discovery, app-product-discovery - **Repository:** https://github.com/gorse-io/gorse ## Is Gorse open source? Yes — Apache-2.0-licensed. ## How much does Gorse cost? It is free to use. ## Can I self-host Gorse? Yes — it can be self-hosted. --- Only ready-to-deploy engine; REST API + dashboard --- # Gradio > Updated 2026-09-03 · type: tool · category: analytics-bi · status: active · rev 1 ~43314 stars; ML-focused; BI fit is secondary; via ossinsight.io - Open source: yes (Apache-2.0) - Self-hostable: yes - Pricing model: free - Best for: Python developers who want to quickly build a demo or web application for their machine learning model. - Last verified: 2026-09-04 - **Canonical:** https://gtmstacker.com/registry/tool/gradio/ - **Source:** [github · github.com/gradio-app](https://github.com/gradio-app/gradio) - **Tags:** analytics-bi, data-visualization - **Repository:** https://github.com/gradio-app/gradio ## Is Gradio open source? Yes — Apache-2.0-licensed. ## How much does Gradio cost? It is free to use. ## Can I self-host Gradio? Yes — it can be self-hosted. --- ~43314 stars; ML-focused; BI fit is secondary; via ossinsight.io --- # GrapesJS > Updated 2026-09-03 · type: tool · category: website-cms · status: active · rev 1 GATE PASS; framework not finished product - Open source: yes (BSD-3-Clause) - Self-hostable: yes - Pricing model: free - Best for: Developers building HTML template/page editors inside a CMS, newsletters, or apps without hand-coding. - Last verified: 2026-09-04 - **Canonical:** https://gtmstacker.com/registry/tool/grapesjs/ - **Source:** [github · github.com/GrapesJS](https://github.com/GrapesJS/grapesjs) - **Tags:** website-cms, website-builders-cms - **Repository:** https://github.com/GrapesJS/grapesjs ## Is GrapesJS open source? Yes — BSD-3-Clause-licensed. ## How much does GrapesJS cost? It is free to use. ## Can I self-host GrapesJS? Yes — it can be self-hosted. --- GATE PASS; framework not finished product --- # Grist > Updated 2026-09-03 · type: tool · category: analytics-bi · status: active · rev 1 OSS alt to Airtable; ~11432 stars; via openalternative.co - Open source: yes (Apache-2.0) - Self-hostable: yes - Pricing model: freemium - Best for: Users who want a spreadsheet-database hybrid for portable, self-contained data management (Community edition is self-hostable; Grist Labs offers paid hosting/full edition). - Last verified: 2026-09-04 - **Canonical:** https://gtmstacker.com/registry/tool/grist/ - **Source:** [github · github.com/gristlabs](https://github.com/gristlabs/grist-core) - **Tags:** analytics-bi - **Repository:** https://github.com/gristlabs/grist-core ## Is Grist open source? Yes — Apache-2.0-licensed. ## How much does Grist cost? It has a free tier plus paid plans. ## Can I self-host Grist? Yes — it can be self-hosted. --- OSS alt to Airtable; ~11432 stars; via openalternative.co --- # gspread > Updated 2026-09-03 · type: tool · category: productivity-knowledge · status: active · rev 1 ~7492 stars; complements google-api-python-client; Ergonomic wrapper over the official Google Sheets API (OAuth2 / service account). ToS-clean; the go-to… - Open source: yes (MIT) - Self-hostable: yes - Pricing model: free - Best for: Python developers who need to programmatically interact with Google Sheets. - Last verified: 2026-09-04 - **Canonical:** https://gtmstacker.com/registry/tool/gspread/ - **Source:** [github · github.com/burnash](https://github.com/burnash/gspread) - **Tags:** productivity-knowledge, productivity-knowledge-bases - **Repository:** https://github.com/burnash/gspread ## Is gspread open source? Yes — MIT-licensed. ## How much does gspread cost? It is free to use. ## Can I self-host gspread? Yes — it can be self-hosted. --- ~7492 stars; complements google-api-python-client; Ergonomic wrapper over the official Google Sheets API (OAuth2 / service account). ToS-clean; the go-to Python Sheets client. Subject to Sheets API per-minute read/write quotas.; via GitHub cross-ref, ossinsight.io --- # Hatchet > Updated 2026-09-03 · type: tool · category: workflow-automation · status: active · rev 1 Lightweight Postgres-only durable orchestration - Open source: yes (MIT) - Self-hostable: yes - Pricing model: freemium - Best for: Development teams that need to orchestrate background tasks, AI agents, and workflows across multiple languages with reliability and observability. - Last verified: 2026-09-04 - **Canonical:** https://gtmstacker.com/registry/tool/hatchet/ - **Source:** [github · github.com/hatchet-dev](https://github.com/hatchet-dev/hatchet) - **Tags:** workflow-automation - **Repository:** https://github.com/hatchet-dev/hatchet ## Is Hatchet open source? Yes — MIT-licensed. ## How much does Hatchet cost? It has a free tier plus paid plans. ## Can I self-host Hatchet? Yes — it can be self-hosted. --- Lightweight Postgres-only durable orchestration --- # Haystack > Updated 2026-09-03 · type: tool · category: ai-infrastructure · status: active · rev 1 Pure Apache; production-focused - Open source: yes (Apache-2.0) - Self-hostable: yes - Pricing model: freemium - Best for: Developers and organizations building production-ready LLM and retrieval-augmented-generation applications in Python. - Last verified: 2026-09-04 - **Canonical:** https://gtmstacker.com/registry/tool/haystack/ - **Source:** [github · github.com/deepset-ai](https://github.com/deepset-ai/haystack) - **Tags:** ai-infrastructure - **Repository:** https://github.com/deepset-ai/haystack ## Is Haystack open source? Yes — Apache-2.0-licensed. ## How much does Haystack cost? It has a free tier plus paid plans. ## Can I self-host Haystack? Yes — it can be self-hosted. --- Pure Apache; production-focused --- # Hermes Agent > Updated 2026-09-03 · type: tool · category: ai-infrastructure · status: active · rev 1 Nous Research self-improving agent; persistent memory + autonomous skill creation; multi-LLM-provider; ~228k stars (anomalously high — verify hype); CAVEAT:… - Open source: yes (MIT) - Self-hostable: yes - Pricing model: free - Best for: Developers and researchers wanting a self-improving, self-hosted AI agent with persistent memory and autonomous skill creation. - Last verified: 2026-09-04 - **Canonical:** https://gtmstacker.com/registry/tool/hermes-agent/ - **Source:** [github · github.com/NousResearch](https://github.com/NousResearch/hermes-agent) - **Tags:** ai-infrastructure, chat-bots-helpdesk - **Repository:** https://github.com/NousResearch/hermes-agent ## Is Hermes Agent open source? Yes — MIT-licensed. ## How much does Hermes Agent cost? It is free to use. ## Can I self-host Hermes Agent? Yes — it can be self-hosted. --- Nous Research self-improving agent; persistent memory + autonomous skill creation; multi-LLM-provider; ~228k stars (anomalously high — verify hype); CAVEAT: autonomous skill-creation = arbitrary code execution by design — sandbox before use --- # Higress > Updated 2026-09-03 · type: tool · category: integration-orchestration · status: active · rev 1 ~9048 stars; via ossinsight.io - Open source: yes (Apache-2.0) - Self-hostable: yes - Pricing model: free - Best for: Developers and operators managing API traffic who need an AI gateway, microservice routing, or Kubernetes ingress control. - Last verified: 2026-09-04 - **Canonical:** https://gtmstacker.com/registry/tool/higress/ - **Source:** [github · github.com/alibaba](https://github.com/alibaba/higress) - **Tags:** integration-orchestration - **Repository:** https://github.com/alibaba/higress ## Is Higress open source? Yes — Apache-2.0-licensed. ## How much does Higress cost? It is free to use. ## Can I self-host Higress? Yes — it can be self-hosted. --- ~9048 stars; via ossinsight.io --- # himalaya > Updated 2026-09-03 · type: tool · category: email-outbound · status: active · rev 1 ~7000 stars; complements imap_tools, isync/mbsync; Open protocols (IMAP/SMTP/JMAP) plus Gmail REST and Graph backends. Auth: password/OAuth2/XOAUTH2. No ToS… - Open source: yes (MIT) - Self-hostable: yes - Pricing model: free - Best for: People who want a stateless command-line email client working across multiple protocols and providers without a GUI. - Last verified: 2026-09-04 - **Canonical:** https://gtmstacker.com/registry/tool/himalaya/ - **Source:** [github · github.com/pimalaya](https://github.com/pimalaya/himalaya) - **Tags:** email-outbound, email-providers-protocols - **Repository:** https://github.com/pimalaya/himalaya ## Is himalaya open source? Yes — MIT-licensed. ## How much does himalaya cost? It is free to use. ## Can I self-host himalaya? Yes — it can be self-hosted. --- ~7000 stars; complements imap_tools, isync/mbsync; Open protocols (IMAP/SMTP/JMAP) plus Gmail REST and Graph backends. Auth: password/OAuth2/XOAUTH2. No ToS risk. --- # Hookdeck Outpost > Updated 2026-09-03 · type: tool · category: integration-orchestration · status: active · rev 1 Broadest destinations (queues/buses) - Open source: yes (Apache-2.0) - Self-hostable: yes - Pricing model: freemium - Best for: Organizations that need to add outbound webhook and event-delivery infrastructure to their platforms. - Last verified: 2026-09-04 - **Canonical:** https://gtmstacker.com/registry/tool/hookdeck-outpost/ - **Source:** [github · github.com/hookdeck](https://github.com/hookdeck/outpost) - **Tags:** integration-orchestration - **Repository:** https://github.com/hookdeck/outpost ## Is Hookdeck Outpost open source? Yes — Apache-2.0-licensed. ## How much does Hookdeck Outpost cost? It has a free tier plus paid plans. ## Can I self-host Hookdeck Outpost? Yes — it can be self-hosted. --- Broadest destinations (queues/buses) --- # Hubot > Updated 2026-09-03 · type: tool · category: integration-orchestration · status: active · rev 1 Lightweight framework - Open source: yes (MIT) - Self-hostable: yes - Pricing model: free - Best for: Developers who want to build customizable chatbots for various chat platforms using a JavaScript framework. - Last verified: 2026-09-04 - **Canonical:** https://gtmstacker.com/registry/tool/hubot/ - **Source:** [github · github.com/hubotio](https://github.com/hubotio/hubot) - **Tags:** integration-orchestration - **Repository:** https://github.com/hubotio/hubot ## Is Hubot open source? Yes — MIT-licensed. ## How much does Hubot cost? It is free to use. ## Can I self-host Hubot? Yes — it can be self-hosted. --- Lightweight framework --- # Hugo > Updated 2026-09-03 · type: tool · category: website-cms · status: active · rev 1 GATE PASS; fastest SSG - Open source: yes (Apache-2.0) - Self-hostable: yes - Pricing model: free - Best for: Developers and content creators building fast static websites, blogs, and documentation. - Last verified: 2026-09-04 - **Canonical:** https://gtmstacker.com/registry/tool/hugo/ - **Source:** [github · github.com/gohugoio](https://github.com/gohugoio/hugo) - **Tags:** website-cms, website-builders-cms - **Repository:** https://github.com/gohugoio/hugo ## Is Hugo open source? Yes — Apache-2.0-licensed. ## How much does Hugo cost? It is free to use. ## Can I self-host Hugo? Yes — it can be self-hosted. --- GATE PASS; fastest SSG --- # Huly > Updated 2026-09-03 · type: tool · category: workflow-automation · status: active · rev 1 OSS alt to Linear/Jira/Slack; ~27264 stars; via ossinsight.io - Open source: yes (EPL-2.0) - Self-hostable: yes - Best for: Teams and organizations wanting an all-in-one project management platform (alternative to Linear, Jira, Slack, Notion). - Last verified: 2026-09-04 - **Canonical:** https://gtmstacker.com/registry/tool/huly/ - **Source:** [github · github.com/hcengineering](https://github.com/hcengineering/platform) - **Tags:** workflow-automation - **Repository:** https://github.com/hcengineering/platform ## Is Huly open source? Yes — EPL-2.0-licensed. ## How much does Huly cost? It is open source — self-hosting is free; you pay only for your own infrastructure. ## Can I self-host Huly? Yes — it can be self-hosted. --- OSS alt to Linear/Jira/Slack; ~27264 stars; via ossinsight.io --- # Ikiform > Updated 2026-09-03 · type: tool · category: lead-capture · status: active · rev 1 OSS alt to Google Forms; ~354 stars; via openalternative.co - Open source: yes (MIT) - Self-hostable: yes - Best for: Organizations and individuals who want to create, manage, and analyze forms with AI-assisted creation, analytics, and integrations. - Last verified: 2026-09-04 - **Canonical:** https://gtmstacker.com/registry/tool/ikiform/ - **Source:** [github · github.com/preetsuthar17](https://github.com/preetsuthar17/ikiform) - **Tags:** lead-capture, lead-capture-forms - **Repository:** https://github.com/preetsuthar17/ikiform ## Is Ikiform open source? Yes — MIT-licensed. ## How much does Ikiform cost? It is open source — self-hosting is free; you pay only for your own infrastructure. ## Can I self-host Ikiform? Yes — it can be self-hosted. --- OSS alt to Google Forms; ~354 stars; via openalternative.co --- # imap_tools > Updated 2026-09-03 · type: tool · category: email-outbound · status: active · rev 1 ~836 stars; complements himalaya; Open IMAP protocol (over imaplib). Auth via credentials/app-password/OAuth. No ToS risk. - Open source: yes (Apache-2.0) - Self-hostable: yes - Pricing model: free - Best for: Python developers who need a high-level library to work with email over IMAP. - Last verified: 2026-09-04 - **Canonical:** https://gtmstacker.com/registry/tool/imap-tools/ - **Source:** [github · github.com/ikvk](https://github.com/ikvk/imap_tools) - **Tags:** email-outbound, email-providers-protocols - **Repository:** https://github.com/ikvk/imap_tools ## Is imap_tools open source? Yes — Apache-2.0-licensed. ## How much does imap_tools cost? It is free to use. ## Can I self-host imap_tools? Yes — it can be self-hosted. --- ~836 stars; complements himalaya; Open IMAP protocol (over imaplib). Auth via credentials/app-password/OAuth. No ToS risk. --- # Inspect AI > Updated 2026-09-03 · type: tool · category: ai-infrastructure · status: active · rev 1 UK AISI; rigorous eval (verified) - Open source: yes (MIT) - Self-hostable: yes - Pricing model: free - Best for: Researchers and organizations evaluating large language models, especially for AI safety and security assessments. - Last verified: 2026-09-04 - **Canonical:** https://gtmstacker.com/registry/tool/inspect-ai/ - **Source:** [github · github.com/UKGovernmentBEIS](https://github.com/UKGovernmentBEIS/inspect_ai) - **Tags:** ai-infrastructure - **Repository:** https://github.com/UKGovernmentBEIS/inspect_ai ## Is Inspect AI open source? Yes — MIT-licensed. ## How much does Inspect AI cost? It is free to use. ## Can I self-host Inspect AI? Yes — it can be self-hosted. --- UK AISI; rigorous eval (verified) --- # Inspector > Updated 2026-09-03 · type: tool · category: prospecting-enrichment · status: active · rev 1 Only real product in scoring cluster; PLG first-party signals - Open source: yes (AGPL-3.0) - Self-hostable: yes - Pricing model: freemium - Best for: Sales and revenue operations teams at product-led growth companies seeking to detect buying signals from product usage data. - Last verified: 2026-09-04 - **Canonical:** https://gtmstacker.com/registry/tool/inspector/ - **Source:** [github · github.com/getbeton](https://github.com/getbeton/inspector) - **Tags:** prospecting-enrichment - **Repository:** https://github.com/getbeton/inspector ## Is Inspector open source? Yes — AGPL-3.0-licensed. ## How much does Inspector cost? It has a free tier plus paid plans. ## Can I self-host Inspector? Yes — it can be self-hosted. --- Only real product in scoring cluster; PLG first-party signals --- # jBPM/Apache KIE > Updated 2026-09-03 · type: tool · category: workflow-automation · status: active · rev 1 Oldest lineage + Drools; ASF incubating. Camunda8 core=SA; Camunda7 EoL - Open source: yes (Apache-2.0) - Self-hostable: yes - Pricing model: free - Best for: Developers and business analysts building enterprise automation with rule, DMN, and workflow engines. - Last verified: 2026-09-04 - **Canonical:** https://gtmstacker.com/registry/tool/jbpmapache-kie/ - **Source:** [github · github.com/apache](https://github.com/apache/incubator-kie-drools) - **Tags:** workflow-automation - **Repository:** https://github.com/apache/incubator-kie-drools ## Is jBPM/Apache KIE open source? Yes — Apache-2.0-licensed. ## How much does jBPM/Apache KIE cost? It is free to use. ## Can I self-host jBPM/Apache KIE? Yes — it can be self-hosted. --- Oldest lineage + Drools; ASF incubating. Camunda8 core=SA; Camunda7 EoL --- # jira-cli > Updated 2026-09-03 · type: tool · category: project-ops · status: active · rev 1 ~5900 stars; complements pycontribs/jira, go-jira; Uses official Jira REST API. Auth via API token (Cloud) or PAT (Server/DC). No ToS risk. - Open source: yes (MIT) - Self-hostable: yes - Pricing model: free - Best for: Developers and teams using Atlassian Jira who want to manage issues, epics, and sprints from the command line. - Last verified: 2026-09-04 - **Canonical:** https://gtmstacker.com/registry/tool/jira-cli/ - **Source:** [github · github.com/ankitpokhrel](https://github.com/ankitpokhrel/jira-cli) - **Tags:** project-ops, project-issue-dev-platforms - **Repository:** https://github.com/ankitpokhrel/jira-cli ## Is jira-cli open source? Yes — MIT-licensed. ## How much does jira-cli cost? It is free to use. ## Can I self-host jira-cli? Yes — it can be self-hosted. --- ~5900 stars; complements pycontribs/jira, go-jira; Uses official Jira REST API. Auth via API token (Cloud) or PAT (Server/DC). No ToS risk. --- # jira (pycontribs) > Updated 2026-09-03 · type: tool · category: project-ops · status: active · rev 1 ~2100 stars; complements jira-cli, go-jira; De-facto Python Jira library (Cloud + Server/DC). Auth via API token/basic/OAuth. Official API; no ToS risk. - Open source: yes (BSD-2-Clause) - Self-hostable: yes - Pricing model: free - Best for: Python developers integrating with the Jira REST API in their applications. - Last verified: 2026-09-04 - **Canonical:** https://gtmstacker.com/registry/tool/jira-pycontribs/ - **Source:** [github · github.com/pycontribs](https://github.com/pycontribs/jira) - **Tags:** project-ops, project-issue-dev-platforms - **Repository:** https://github.com/pycontribs/jira ## Is jira (pycontribs) open source? Yes — BSD-2-Clause-licensed. ## How much does jira (pycontribs) cost? It is free to use. ## Can I self-host jira (pycontribs)? Yes — it can be self-hosted. --- ~2100 stars; complements jira-cli, go-jira; De-facto Python Jira library (Cloud + Server/DC). Auth via API token/basic/OAuth. Official API; no ToS risk. --- # JupyterLab > Updated 2026-09-03 · type: tool · category: analytics-bi · status: active · rev 1 Standard notebook host; use v4 - Open source: yes (BSD-3-Clause) - Self-hostable: yes - Pricing model: free - Best for: Researchers, data scientists, and developers who need an extensible notebook environment for interactive and reproducible computing. - Last verified: 2026-09-04 - **Canonical:** https://gtmstacker.com/registry/tool/jupyterlab/ - **Source:** [github · github.com/jupyterlab](https://github.com/jupyterlab/jupyterlab) - **Tags:** analytics-bi, data-visualization - **Repository:** https://github.com/jupyterlab/jupyterlab ## Is JupyterLab open source? Yes — BSD-3-Clause-licensed. ## How much does JupyterLab cost? It is free to use. ## Can I self-host JupyterLab? Yes — it can be self-hosted. --- Standard notebook host; use v4 --- # KeystoneJS > Updated 2026-09-03 · type: tool · category: website-cms · status: active · rev 1 OSS alt to Contentful; ~9938 stars; via openalternative.co - Open source: yes (MIT) - Self-hostable: yes - Pricing model: free - Best for: Developers building applications and managing content programmatically via a GraphQL API and CMS/app framework. - Last verified: 2026-09-04 - **Canonical:** https://gtmstacker.com/registry/tool/keystonejs/ - **Source:** [github · github.com/keystonejs](https://github.com/keystonejs/keystone) - **Tags:** website-cms, website-builders-cms - **Repository:** https://github.com/keystonejs/keystone ## Is KeystoneJS open source? Yes — MIT-licensed. ## How much does KeystoneJS cost? It is free to use. ## Can I self-host KeystoneJS? Yes — it can be self-hosted. --- OSS alt to Contentful; ~9938 stars; via openalternative.co --- # khal > Updated 2026-09-03 · type: tool · category: meetings-scheduling · status: active · rev 1 ~3000 stars; complements caldav, vdirsyncer; Standards-based terminal calendar; syncs to CalDAV servers via vdirsyncer. Open protocol — no ToS/ban risk. - Open source: yes (MIT) - Self-hostable: yes - Pricing model: free - Best for: Command-line users who need a standards-based terminal calendar with CalDAV synchronization. - Last verified: 2026-09-04 - **Canonical:** https://gtmstacker.com/registry/tool/khal/ - **Source:** [github · github.com/pimutils](https://github.com/pimutils/khal) - **Tags:** meetings-scheduling, calendar-scheduling - **Repository:** https://github.com/pimutils/khal ## Is khal open source? Yes — MIT-licensed. ## How much does khal cost? It is free to use. ## Can I self-host khal? Yes — it can be self-hosted. --- ~3000 stars; complements caldav, vdirsyncer; Standards-based terminal calendar; syncs to CalDAV servers via vdirsyncer. Open protocol — no ToS/ban risk. --- # Klavis AI > Updated 2026-09-03 · type: tool · category: mcp-agents · status: active · rev 1 OSS alt to Composio MCP, proprietary MCP hubs; ~5800 stars; complements modelcontextprotocol/servers, ACI.dev, MetaMCP; Apache-2.0. Fleet of per-app MCP… - Open source: yes (Apache-2.0) - Self-hostable: yes - Pricing model: freemium - Best for: Developers and AI teams building agents that need reliable access to external tools and integrations at scale. - Last verified: 2026-09-04 - **Canonical:** https://gtmstacker.com/registry/tool/klavis-ai/ - **Source:** [github · github.com/Klavis-AI](https://github.com/Klavis-AI/klavis) - **Tags:** mcp-agents, agent-connectors-mcp-servers - **Repository:** https://github.com/Klavis-AI/klavis ## Is Klavis AI open source? Yes — Apache-2.0-licensed. ## How much does Klavis AI cost? It has a free tier plus paid plans. ## Can I self-host Klavis AI? Yes — it can be self-hosted. --- OSS alt to Composio MCP, proprietary MCP hubs; ~5800 stars; complements modelcontextprotocol/servers, ACI.dev, MetaMCP; Apache-2.0. Fleet of per-app MCP servers with built-in OAuth flows (Gmail/Slack/GitHub/Notion/Jira/etc.); uses each provider's official OAuth -> platform-tos empty. Self-hostable or hosted. --- # LangGraph > Updated 2026-09-03 · type: tool · category: ai-infrastructure · status: active · rev 1 v1.0 GA; pin versions (LangChain CVE cluster) - Open source: yes (MIT) - Self-hostable: yes - Pricing model: free - Best for: Developers building long-running, stateful agents and workflows needing durable execution and human oversight. - Last verified: 2026-09-04 - **Canonical:** https://gtmstacker.com/registry/tool/langgraph/ - **Source:** [github · github.com/langchain-ai](https://github.com/langchain-ai/langgraph) - **Tags:** ai-infrastructure - **Repository:** https://github.com/langchain-ai/langgraph ## Is LangGraph open source? Yes — MIT-licensed. ## How much does LangGraph cost? It is free to use. ## Can I self-host LangGraph? Yes — it can be self-hosted. --- v1.0 GA; pin versions (LangChain CVE cluster) --- # laravel-process-approval > Updated 2026-09-03 · type: tool · category: workflow-automation · status: active · rev 1 Most-starred approval component; library - Open source: yes (MIT) - Self-hostable: yes - Pricing model: free - Best for: Laravel developers who need multi-level approval workflows for Eloquent models. - Last verified: 2026-09-04 - **Canonical:** https://gtmstacker.com/registry/tool/laravel-process-approval/ - **Source:** [github · github.com/ringlesoft](https://github.com/ringlesoft/laravel-process-approval) - **Tags:** workflow-automation - **Repository:** https://github.com/ringlesoft/laravel-process-approval ## Is laravel-process-approval open source? Yes — MIT-licensed. ## How much does laravel-process-approval cost? It is free to use. ## Can I self-host laravel-process-approval? Yes — it can be self-hosted. --- Most-starred approval component; library --- # LibreChat > Updated 2026-09-03 · type: tool · category: chat-helpdesk · status: active · rev 1 Cleanest MIT chat platform; agents/MCP/RAG - Open source: yes (MIT) - Self-hostable: yes - Pricing model: free - Best for: Anyone who values control over their AI infrastructure and wants a self-hosted platform unifying multiple AI providers. - Last verified: 2026-09-04 - **Canonical:** https://gtmstacker.com/registry/tool/librechat/ - **Source:** [github · github.com/danny-avila](https://github.com/danny-avila/LibreChat) - **Tags:** chat-helpdesk, chat-bots-helpdesk - **Repository:** https://github.com/danny-avila/LibreChat ## Is LibreChat open source? Yes — MIT-licensed. ## How much does LibreChat cost? It is free to use. ## Can I self-host LibreChat? Yes — it can be self-hosted. --- Cleanest MIT chat platform; agents/MCP/RAG --- # LimeSurvey > Updated 2026-09-03 · type: tool · category: seo-research · status: active · rev 1 Mature; purest OSI; aging PHP - Open source: yes (GPL-2.0-or-later) - Self-hostable: yes - Pricing model: freemium - Best for: Businesses, academics, governments, and researchers who build and analyze online surveys. - Last verified: 2026-09-04 - **Canonical:** https://gtmstacker.com/registry/tool/limesurvey/ - **Source:** [github · github.com/LimeSurvey](https://github.com/LimeSurvey/LimeSurvey) - **Tags:** seo-research, seo-market-research - **Repository:** https://github.com/LimeSurvey/LimeSurvey ## Is LimeSurvey open source? Yes — GPL-2.0-or-later-licensed. ## How much does LimeSurvey cost? It has a free tier plus paid plans. ## Can I self-host LimeSurvey? Yes — it can be self-hosted. --- Mature; purest OSI; aging PHP --- # @linear/sdk (Linear SDK) > Updated 2026-09-03 · type: tool · category: project-ops · status: active · rev 1 ~1500 stars; complements schpet/linear-cli; Official Linear SDK monorepo. Auth via API key/OAuth. GraphQL API; no ToS risk. - Open source: yes (MIT) - Self-hostable: yes - Best for: Software developers and teams building products who need SDKs and tools to interact with the Linear GraphQL API. - Last verified: 2026-09-04 - **Canonical:** https://gtmstacker.com/registry/tool/linearsdk-linear-sdk/ - **Source:** [github · github.com/linear](https://github.com/linear/linear) - **Tags:** project-ops, project-issue-dev-platforms - **Repository:** https://github.com/linear/linear ## Is @linear/sdk (Linear SDK) open source? Yes — MIT-licensed. ## How much does @linear/sdk (Linear SDK) cost? It is open source — self-hosting is free; you pay only for your own infrastructure. ## Can I self-host @linear/sdk (Linear SDK)? Yes — it can be self-hosted. --- ~1500 stars; complements schpet/linear-cli; Official Linear SDK monorepo. Auth via API key/OAuth. GraphQL API; no ToS risk. --- # LlamaIndex > Updated 2026-09-03 · type: tool · category: ai-infrastructure · status: active · rev 1 RAG/document-centric - Open source: yes (MIT) - Self-hostable: yes - Pricing model: free - Best for: Developers building LLM/agentic applications who need to augment LLMs with private data via ingestion and retrieval. - Last verified: 2026-09-04 - **Canonical:** https://gtmstacker.com/registry/tool/llamaindex/ - **Source:** [github · github.com/run-llama](https://github.com/run-llama/llama_index) - **Tags:** ai-infrastructure - **Repository:** https://github.com/run-llama/llama_index ## Is LlamaIndex open source? Yes — MIT-licensed. ## How much does LlamaIndex cost? It is free to use. ## Can I self-host LlamaIndex? Yes — it can be self-hosted. --- RAG/document-centric --- # LocalAI > Updated 2026-09-03 · type: tool · category: ai-infrastructure · status: active · rev 1 Broadest modality; single-maintainer bus-factor - Open source: yes (MIT) - Self-hostable: yes - Pricing model: free - Best for: Organizations and individuals seeking to run AI models locally across multiple modalities without requiring GPU hardware or cloud dependencies. - Last verified: 2026-09-04 - **Canonical:** https://gtmstacker.com/registry/tool/localai/ - **Source:** [github · github.com/mudler](https://github.com/mudler/LocalAI) - **Tags:** ai-infrastructure - **Repository:** https://github.com/mudler/LocalAI ## Is LocalAI open source? Yes — MIT-licensed. ## How much does LocalAI cost? It is free to use. ## Can I self-host LocalAI? Yes — it can be self-hosted. --- Broadest modality; single-maintainer bus-factor --- # LogChimp > Updated 2026-09-03 · type: tool · category: chat-helpdesk · status: active · rev 1 OSS alt to Featurebase; ~1114 stars; via openalternative.co - Open source: yes (Apache-2.0) - Self-hostable: yes - Best for: Product teams and managers tracking customer feedback to build better products (a Canny/ProductBoard alternative). - Last verified: 2026-09-04 - **Canonical:** https://gtmstacker.com/registry/tool/logchimp/ - **Source:** [github · github.com/logchimp](https://github.com/logchimp/logchimp) - **Tags:** chat-helpdesk, chat-bots-helpdesk - **Repository:** https://github.com/logchimp/logchimp ## Is LogChimp open source? Yes — Apache-2.0-licensed. ## How much does LogChimp cost? It is open source — self-hosting is free; you pay only for your own infrastructure. ## Can I self-host LogChimp? Yes — it can be self-hosted. --- OSS alt to Featurebase; ~1114 stars; via openalternative.co --- # Lowcoder > Updated 2026-09-03 · type: tool · category: workflow-automation · status: active · rev 1 Retool-clone successor; NocoDB reclassified SA - Open source: yes (AGPL-3.0) - Self-hostable: yes - Pricing model: free - Best for: Developers and business teams building internal tools, admin panels, and dashboards with low-code. - Last verified: 2026-09-04 - **Canonical:** https://gtmstacker.com/registry/tool/lowcoder/ - **Source:** [github · github.com/lowcoder-org](https://github.com/lowcoder-org/lowcoder) - **Tags:** workflow-automation - **Repository:** https://github.com/lowcoder-org/lowcoder ## Is Lowcoder open source? Yes — AGPL-3.0-licensed. ## How much does Lowcoder cost? It is free to use. ## Can I self-host Lowcoder? Yes — it can be self-hosted. --- Retool-clone successor; NocoDB reclassified SA --- # Mage > Updated 2026-09-03 · type: tool · category: integration-orchestration · status: active · rev 1 OSS alt to Airflow; ~8789 stars; via openalternative.co - Open source: yes (Apache-2.0) - Self-hostable: yes - Pricing model: freemium - Best for: Data engineers and teams building and orchestrating production-grade ETL and data pipelines in a self-hosted environment. - Last verified: 2026-09-04 - **Canonical:** https://gtmstacker.com/registry/tool/mage/ - **Source:** [github · github.com/mage-ai](https://github.com/mage-ai/mage-ai) - **Tags:** integration-orchestration - **Repository:** https://github.com/mage-ai/mage-ai ## Is Mage open source? Yes — Apache-2.0-licensed. ## How much does Mage cost? It has a free tier plus paid plans. ## Can I self-host Mage? Yes — it can be self-hosted. --- OSS alt to Airflow; ~8789 stars; via openalternative.co --- # mail-parser (SpamScope) > Updated 2026-09-03 · type: tool · category: email-outbound · status: active · rev 1 ~452 stars; complements email-reply-parser; Pure parsing library (no network/auth). RFC-compliant, Outlook .msg support, defect detection. No ToS risk. - Open source: yes (Apache-2.0) - Self-hostable: yes - Pricing model: free - Best for: Security professionals and developers needing production-grade email parsing for threat analysis, forensics, and compliance. - Last verified: 2026-09-04 - **Canonical:** https://gtmstacker.com/registry/tool/mail-parser-spamscope/ - **Source:** [github · github.com/SpamScope](https://github.com/SpamScope/mail-parser) - **Tags:** email-outbound, email-providers-protocols - **Repository:** https://github.com/SpamScope/mail-parser ## Is mail-parser (SpamScope) open source? Yes — Apache-2.0-licensed. ## How much does mail-parser (SpamScope) cost? It is free to use. ## Can I self-host mail-parser (SpamScope)? Yes — it can be self-hosted. --- ~452 stars; complements email-reply-parser; Pure parsing library (no network/auth). RFC-compliant, Outlook .msg support, defect detection. No ToS risk. --- # Marimo > Updated 2026-09-03 · type: tool · category: analytics-bi · status: active · rev 1 Reactive git-native deployable notebook - Open source: yes (Apache-2.0) - Self-hostable: yes - Pricing model: free - Best for: Researchers, data scientists, and developers who want to run reproducible experiments, build interactive applications, and share their work. - Last verified: 2026-09-04 - **Canonical:** https://gtmstacker.com/registry/tool/marimo/ - **Source:** [github · github.com/marimo-team](https://github.com/marimo-team/marimo) - **Tags:** analytics-bi, data-visualization - **Repository:** https://github.com/marimo-team/marimo ## Is Marimo open source? Yes — Apache-2.0-licensed. ## How much does Marimo cost? It is free to use. ## Can I self-host Marimo? Yes — it can be self-hosted. --- Reactive git-native deployable notebook --- # Mastodon.py > Updated 2026-09-03 · type: tool · category: social-community · status: active · rev 1 ~957 stars; complements toot; OAuth2 app tokens against the documented, open Mastodon REST API (open protocol / ActivityPub). No ToS/ban risk — self-hostable,… - Open source: yes (MIT) - Self-hostable: yes - Pricing model: free - Best for: Python developers building applications that interact with Mastodon servers via the Mastodon API. - Last verified: 2026-09-04 - **Canonical:** https://gtmstacker.com/registry/tool/mastodonpy/ - **Source:** [github · github.com/halcy](https://github.com/halcy/Mastodon.py) - **Tags:** social-community, social-microblogging-communities - **Repository:** https://github.com/halcy/Mastodon.py ## Is Mastodon.py open source? Yes — MIT-licensed. ## How much does Mastodon.py cost? It is free to use. ## Can I self-host Mastodon.py? Yes — it can be self-hosted. --- ~957 stars; complements toot; OAuth2 app tokens against the documented, open Mastodon REST API (open protocol / ActivityPub). No ToS/ban risk — self-hostable, per-instance rate limits. Feature-complete through Mastodon 4.5. --- # Matomo > Updated 2026-09-03 · type: tool · category: analytics-bi · status: active · rev 1 Full web analytics + attribution/funnels - Open source: yes (GPL-3.0) - Self-hostable: yes - Pricing model: freemium - Best for: Website owners and organizations wanting a privacy-respecting, self-controlled alternative to Google Analytics. - Last verified: 2026-09-04 - **Canonical:** https://gtmstacker.com/registry/tool/matomo/ - **Source:** [github · github.com/matomo-org](https://github.com/matomo-org/matomo) - **Tags:** analytics-bi - **Repository:** https://github.com/matomo-org/matomo ## Is Matomo open source? Yes — GPL-3.0-licensed. ## How much does Matomo cost? It has a free tier plus paid plans. ## Can I self-host Matomo? Yes — it can be self-hosted. --- Full web analytics + attribution/funnels --- # matplotlib > Updated 2026-09-03 · type: tool · category: analytics-bi · status: active · rev 1 Custom license — flag for strict scanners - Open source: yes (Matplotlib License (PSF-based)) - Self-hostable: yes - Pricing model: free - Best for: Python developers and data scientists who need to create static, animated, and interactive visualizations. - Last verified: 2026-09-04 - **Canonical:** https://gtmstacker.com/registry/tool/matplotlib/ - **Source:** [github · github.com/matplotlib](https://github.com/matplotlib/matplotlib) - **Tags:** analytics-bi, data-visualization - **Repository:** https://github.com/matplotlib/matplotlib ## Is matplotlib open source? Yes — Matplotlib License (PSF-based)-licensed. ## How much does matplotlib cost? It is free to use. ## Can I self-host matplotlib? Yes — it can be self-hosted. --- Custom license — flag for strict scanners --- # matrix-nio > Updated 2026-09-03 · type: tool · category: chat-helpdesk · status: active · rev 1 ~705 stars; complements mautrix-python; Open Matrix client-server protocol with E2EE. Auth via access token/password. Open federated standard; no ToS risk. - Open source: yes (Apache-2.0) - Self-hostable: yes - Pricing model: free - Best for: Python developers building applications that communicate with Matrix servers, including encrypted messaging. - Last verified: 2026-09-04 - **Canonical:** https://gtmstacker.com/registry/tool/matrix-nio/ - **Source:** [github · github.com/poljar](https://github.com/poljar/matrix-nio) - **Tags:** chat-helpdesk, messaging-chat-platforms - **Repository:** https://github.com/poljar/matrix-nio ## Is matrix-nio open source? Yes — Apache-2.0-licensed. ## How much does matrix-nio cost? It is free to use. ## Can I self-host matrix-nio? Yes — it can be self-hosted. --- ~705 stars; complements mautrix-python; Open Matrix client-server protocol with E2EE. Auth via access token/password. Open federated standard; no ToS risk. --- # mautrix-python > Updated 2026-09-03 · type: tool · category: chat-helpdesk · status: active · rev 1 ~251 stars; complements matrix-nio; Matrix framework powering the mautrix bridges (and maubot). Open protocol; appservice auth via registration token. No ToS… - Open source: yes (MPL-2.0) - Self-hostable: yes - Pricing model: free - Best for: Developers building Matrix protocol applications such as bridges, bots, and clients using an asyncio framework. - Last verified: 2026-09-04 - **Canonical:** https://gtmstacker.com/registry/tool/mautrix-python/ - **Source:** [github · github.com/mautrix](https://github.com/mautrix/python) - **Tags:** chat-helpdesk, messaging-chat-platforms - **Repository:** https://github.com/mautrix/python ## Is mautrix-python open source? Yes — MPL-2.0-licensed. ## How much does mautrix-python cost? It is free to use. ## Can I self-host mautrix-python? Yes — it can be self-hosted. --- ~251 stars; complements matrix-nio; Matrix framework powering the mautrix bridges (and maubot). Open protocol; appservice auth via registration token. No ToS risk on Matrix side (individual bridges to WhatsApp/Telegram carry those platforms' ToS). --- # MCP Context Forge > Updated 2026-09-03 · type: tool · category: integration-orchestration · status: active · rev 1 ~4285 stars; via ossinsight.io - Open source: yes (Apache-2.0) - Self-hostable: yes - Pricing model: free - Best for: Organizations deploying AI agents and LLM applications that need centralized governance and discovery across multiple MCP servers, REST APIs, and gRPC services. - Last verified: 2026-09-04 - **Canonical:** https://gtmstacker.com/registry/tool/mcp-context-forge/ - **Source:** [github · github.com/IBM](https://github.com/IBM/mcp-context-forge) - **Tags:** integration-orchestration, agent-connectors-mcp-servers - **Repository:** https://github.com/IBM/mcp-context-forge ## Is MCP Context Forge open source? Yes — Apache-2.0-licensed. ## How much does MCP Context Forge cost? It is free to use. ## Can I self-host MCP Context Forge? Yes — it can be self-hosted. --- ~4285 stars; via ossinsight.io --- # MCP Inspector > Updated 2026-09-03 · type: tool · category: integration-orchestration · status: active · rev 1 ~10621 stars; via ossinsight.io - Open source: yes (MIT) - Self-hostable: yes - Pricing model: free - Best for: Developers working with Model Context Protocol servers who need to test and debug them via web, CLI, or terminal interfaces. - Last verified: 2026-09-04 - **Canonical:** https://gtmstacker.com/registry/tool/mcp-inspector/ - **Source:** [github · github.com/modelcontextprotocol](https://github.com/modelcontextprotocol/inspector) - **Tags:** integration-orchestration - **Repository:** https://github.com/modelcontextprotocol/inspector ## Is MCP Inspector open source? Yes — MIT-licensed. ## How much does MCP Inspector cost? It is free to use. ## Can I self-host MCP Inspector? Yes — it can be self-hosted. --- ~10621 stars; via ossinsight.io --- # mcp-use > Updated 2026-09-03 · type: tool · category: integration-orchestration · status: active · rev 1 ~10462 stars; via ossinsight.io - Open source: yes (MIT) - Self-hostable: yes - Pricing model: freemium - Best for: Developers building MCP servers and interactive AI-agent applications for ChatGPT, Claude, and agents in TypeScript. - Last verified: 2026-09-04 - **Canonical:** https://gtmstacker.com/registry/tool/mcp-use/ - **Source:** [github · github.com/mcp-use](https://github.com/mcp-use/mcp-use) - **Tags:** integration-orchestration - **Repository:** https://github.com/mcp-use/mcp-use ## Is mcp-use open source? Yes — MIT-licensed. ## How much does mcp-use cost? It has a free tier plus paid plans. ## Can I self-host mcp-use? Yes — it can be self-hosted. --- ~10462 stars; via ossinsight.io --- # MCPJungle > Updated 2026-09-03 · type: tool · category: mcp-agents · status: active · rev 1 OSS alt to proprietary MCP gateways; ~1200 stars; complements MetaMCP, lasso mcp-gateway; MPL-2.0 (weak copyleft). Self-hosted registry+gateway: register… - Open source: yes (MPL-2.0) - Self-hostable: yes - Pricing model: free - Best for: Developers and teams who want to centrally manage multiple MCP servers without scattered client configurations. - Last verified: 2026-09-04 - **Canonical:** https://gtmstacker.com/registry/tool/mcpjungle/ - **Source:** [github · github.com/mcpjungle](https://github.com/mcpjungle/MCPJungle) - **Tags:** mcp-agents, agent-connectors-mcp-servers - **Repository:** https://github.com/mcpjungle/MCPJungle ## Is MCPJungle open source? Yes — MPL-2.0-licensed. ## How much does MCPJungle cost? It is free to use. ## Can I self-host MCPJungle? Yes — it can be self-hosted. --- OSS alt to proprietary MCP gateways; ~1200 stars; complements MetaMCP, lasso mcp-gateway; MPL-2.0 (weak copyleft). Self-hosted registry+gateway: register servers once, expose one endpoint to Claude/Cursor/Codex/agents with access control. Auth delegated to registered servers. No per-platform ToS flag. --- # Media Cloud > Updated 2026-09-03 · type: tool · category: seo-research · status: active · rev 1 Large-scale news monitoring; research-grade - Open source: yes (Apache-2.0) - Self-hostable: yes - Best for: Organizations operating news archives that need a pipeline to ingest online news stories (the Media Cloud archive core). - Last verified: 2026-09-04 - **Canonical:** https://gtmstacker.com/registry/tool/media-cloud/ - **Source:** [github · github.com/mediacloud](https://github.com/mediacloud/story-indexer) - **Tags:** seo-research, seo-market-research - **Repository:** https://github.com/mediacloud/story-indexer ## Is Media Cloud open source? Yes — Apache-2.0-licensed. ## How much does Media Cloud cost? It is open source — self-hosting is free; you pay only for your own infrastructure. ## Can I self-host Media Cloud? Yes — it can be self-hosted. --- Large-scale news monitoring; research-grade --- # MetaMCP > Updated 2026-09-03 · type: tool · category: mcp-agents · status: active · rev 1 OSS alt to proprietary MCP gateways; MCP Context Forge (XREF); ~2600 stars; complements MCPJungle, lasso mcp-gateway, Klavis; MIT (successor to metatool-app).… - Open source: yes (MIT) - Self-hostable: yes - Pricing model: free - Best for: Developers who use it as infrastructure to host dynamically composed MCP servers grouped into namespaces and build agents on top of it. - Last verified: 2026-09-04 - **Canonical:** https://gtmstacker.com/registry/tool/metamcp/ - **Source:** [github · github.com/metatool-ai](https://github.com/metatool-ai/metamcp) - **Tags:** mcp-agents, agent-connectors-mcp-servers - **Repository:** https://github.com/metatool-ai/metamcp ## Is MetaMCP open source? Yes — MIT-licensed. ## How much does MetaMCP cost? It is free to use. ## Can I self-host MetaMCP? Yes — it can be self-hosted. --- OSS alt to proprietary MCP gateways; MCP Context Forge (XREF); ~2600 stars; complements MCPJungle, lasso mcp-gateway, Klavis; MIT (successor to metatool-app). Groups MCP servers into namespaces, exposes unified SSE/HTTP/OpenAPI endpoints with middlewares + API-key/OIDC auth, Docker-packaged. It fronts other servers; auth is delegated to them. No per-platform ToS flag. --- # MiroFish > Updated 2026-09-03 · type: tool · category: ai-infrastructure · status: active · rev 1 Multi-agent AI prediction engine: builds a digital-twin sandbox of thousands of agents to forecast trajectories from seed data; ~71k stars (verify velocity);… - Open source: yes (AGPL-3.0) - Self-hostable: yes - Best for: Professionals and enthusiasts (from policymakers to creative explorers) simulating future scenarios in a digital-twin sandbox. - Last verified: 2026-09-04 - **Canonical:** https://gtmstacker.com/registry/tool/mirofish/ - **Source:** [github · github.com/666ghj](https://github.com/666ghj/MiroFish) - **Tags:** ai-infrastructure - **Repository:** https://github.com/666ghj/MiroFish ## Is MiroFish open source? Yes — AGPL-3.0-licensed. ## How much does MiroFish cost? It is open source — self-hosting is free; you pay only for your own infrastructure. ## Can I self-host MiroFish? Yes — it can be self-hosted. --- Multi-agent AI prediction engine: builds a digital-twin sandbox of thousands of agents to forecast trajectories from seed data; ~71k stars (verify velocity); AGPL network-copyleft --- # Mixpost > Updated 2026-09-03 · type: tool · category: content-copywriting · status: active · rev 1 OSS alt to Buffer; ~3496 stars; via openalternative.co - Open source: yes (MIT) - Self-hostable: yes - Pricing model: freemium - Best for: Enterprises, small-to-medium businesses, marketing agencies, solopreneurs, and e-commerce stores managing social media content on their own server. - Last verified: 2026-09-04 - **Canonical:** https://gtmstacker.com/registry/tool/mixpost/ - **Source:** [github · github.com/inovector](https://github.com/inovector/mixpost) - **Tags:** content-copywriting - **Repository:** https://github.com/inovector/mixpost ## Is Mixpost open source? Yes — MIT-licensed. ## How much does Mixpost cost? It has a free tier plus paid plans. ## Can I self-host Mixpost? Yes — it can be self-hosted. --- OSS alt to Buffer; ~3496 stars; via openalternative.co --- # modelcontextprotocol/servers > Updated 2026-09-03 · type: tool · category: mcp-agents · status: active · rev 1 OSS alt to proprietary agent-tool plugins; ~89000 stars; complements Klavis, awesome-mcp-servers, MCP Context Forge (XREF); Reference servers under MIT,… - Open source: yes (MIT / Apache-2.0 (transitioning)) - Self-hostable: yes - Pricing model: free - Best for: Developers building their own MCP servers, using these reference implementations as educational examples. - Last verified: 2026-09-04 - **Canonical:** https://gtmstacker.com/registry/tool/modelcontextprotocolservers/ - **Source:** [github · github.com/modelcontextprotocol](https://github.com/modelcontextprotocol/servers) - **Tags:** mcp-agents, agent-connectors-mcp-servers - **Repository:** https://github.com/modelcontextprotocol/servers ## Is modelcontextprotocol/servers open source? Yes — MIT / Apache-2.0 (transitioning)-licensed. ## How much does modelcontextprotocol/servers cost? It is free to use. ## Can I self-host modelcontextprotocol/servers? Yes — it can be self-hosted. --- OSS alt to proprietary agent-tool plugins; ~89000 stars; complements Klavis, awesome-mcp-servers, MCP Context Forge (XREF); Reference servers under MIT, transitioning to Apache-2.0 (new contributions Apache-2.0; unrelicensed MIT contributions stay MIT) -> OSI-open either way. Each server uses the target service's official auth. No per-platform ToS flag. --- # msgraph-sdk-python (Microsoft Graph) > Updated 2026-09-03 · type: tool · category: email-outbound · status: active · rev 1 ~624 stars; complements python-o365, exchangelib; Official Microsoft Graph v1.0 Python SDK. Auth via MSAL OAuth2 (app/delegated). No ToS risk. - Open source: yes (MIT) - Self-hostable: yes - Pricing model: free - Best for: Developers building Python applications that integrate the Microsoft Graph API to access Microsoft cloud services. - Last verified: 2026-09-04 - **Canonical:** https://gtmstacker.com/registry/tool/msgraph-sdk-python-microsoft-graph/ - **Source:** [github · github.com/microsoftgraph](https://github.com/microsoftgraph/msgraph-sdk-python) - **Tags:** email-outbound, email-providers-protocols, productivity-knowledge-bases - **Repository:** https://github.com/microsoftgraph/msgraph-sdk-python ## Is msgraph-sdk-python (Microsoft Graph) open source? Yes — MIT-licensed. ## How much does msgraph-sdk-python (Microsoft Graph) cost? It is free to use. ## Can I self-host msgraph-sdk-python (Microsoft Graph)? Yes — it can be self-hosted. --- ~624 stars; complements python-o365, exchangelib; Official Microsoft Graph v1.0 Python SDK. Auth via MSAL OAuth2 (app/delegated). No ToS risk. --- # Nordcraft > Updated 2026-09-03 · type: tool · category: website-cms · status: active · rev 1 OSS alt to Webflow; ~487 stars; via openalternative.co - Open source: yes (Apache-2.0) - Self-hostable: yes - Best for: Developers building highly performant web apps with SSR, version control, and components. - Last verified: 2026-09-04 - **Canonical:** https://gtmstacker.com/registry/tool/nordcraft/ - **Source:** [github · github.com/nordcraftengine](https://github.com/nordcraftengine/nordcraft) - **Tags:** website-cms, website-builders-cms - **Repository:** https://github.com/nordcraftengine/nordcraft ## Is Nordcraft open source? Yes — Apache-2.0-licensed. ## How much does Nordcraft cost? It is open source — self-hosting is free; you pay only for your own infrastructure. ## Can I self-host Nordcraft? Yes — it can be self-hosted. --- OSS alt to Webflow; ~487 stars; via openalternative.co --- # notesmd-cli (Obsidian CLI Community) > Updated 2026-09-03 · type: tool · category: productivity-knowledge · status: active · rev 1 ~1568 stars; complements obsidian-git; Go CLI acting on LOCAL Obsidian vault markdown files (plus obsidian:// URIs) — no platform account, no ToS/ban risk… - Open source: yes (MIT) - Self-hostable: yes - Pricing model: free - Best for: Terminal users who want to interact with Obsidian vaults without needing the Obsidian app running. - Last verified: 2026-09-04 - **Canonical:** https://gtmstacker.com/registry/tool/notesmd-cli-obsidian-cli-community/ - **Source:** [github · github.com/Yakitrak](https://github.com/Yakitrak/notesmd-cli) - **Tags:** productivity-knowledge, productivity-knowledge-bases - **Repository:** https://github.com/Yakitrak/notesmd-cli ## Is notesmd-cli (Obsidian CLI Community) open source? Yes — MIT-licensed. ## How much does notesmd-cli (Obsidian CLI Community) cost? It is free to use. ## Can I self-host notesmd-cli (Obsidian CLI Community)? Yes — it can be self-hosted. --- ~1568 stars; complements obsidian-git; Go CLI acting on LOCAL Obsidian vault markdown files (plus obsidian:// URIs) — no platform account, no ToS/ban risk (local files). Active; formerly named obsidian-cli. Finalist for local-KB automation. --- # notion-sdk-js > Updated 2026-09-03 · type: tool · category: productivity-knowledge · status: active · rev 1 ~5649 stars; complements notion-sdk-py, ultimate-notion; VENDOR (makenotion) official JavaScript/TypeScript SDK for the Notion API (integration token /… - Open source: yes (MIT) - Self-hostable: yes - Pricing model: free - Best for: JavaScript/TypeScript developers building applications that integrate with the Notion API. - Last verified: 2026-09-04 - **Canonical:** https://gtmstacker.com/registry/tool/notion-sdk-js/ - **Source:** [github · github.com/makenotion](https://github.com/makenotion/notion-sdk-js) - **Tags:** productivity-knowledge, productivity-knowledge-bases - **Repository:** https://github.com/makenotion/notion-sdk-js ## Is notion-sdk-js open source? Yes — MIT-licensed. ## How much does notion-sdk-js cost? It is free to use. ## Can I self-host notion-sdk-js? Yes — it can be self-hosted. --- ~5649 stars; complements notion-sdk-py, ultimate-notion; VENDOR (makenotion) official JavaScript/TypeScript SDK for the Notion API (integration token / OAuth). ToS-clean and authoritative for Node projects. --- # notion-sdk-py > Updated 2026-09-03 · type: tool · category: productivity-knowledge · status: active · rev 1 ~2174 stars; complements notion-sdk-js, ultimate-notion; Sync+async Python client mirroring the OFFICIAL Notion API (integration token / OAuth). ToS-clean;… - Open source: yes (MIT) - Self-hostable: yes - Pricing model: free - Best for: Developers building applications that integrate with the official Notion API in Python. - Last verified: 2026-09-04 - **Canonical:** https://gtmstacker.com/registry/tool/notion-sdk-py/ - **Source:** [github · github.com/ramnes](https://github.com/ramnes/notion-sdk-py) - **Tags:** productivity-knowledge, productivity-knowledge-bases - **Repository:** https://github.com/ramnes/notion-sdk-py ## Is notion-sdk-py open source? Yes — MIT-licensed. ## How much does notion-sdk-py cost? It is free to use. ## Can I self-host notion-sdk-py? Yes — it can be self-hosted. --- ~2174 stars; complements notion-sdk-js, ultimate-notion; Sync+async Python client mirroring the OFFICIAL Notion API (integration token / OAuth). ToS-clean; the de-facto Python SDK. Standard Notion API rate limit ~3 req/s per integration.; via GitHub cross-ref, ossinsight.io --- # Observable Plot > Updated 2026-09-03 · type: tool · category: analytics-bi · status: active · rev 1 Concise grammar-of-graphics on D3 - Open source: yes (ISC) - Self-hostable: yes - Pricing model: free - Best for: Developers and analysts accelerating exploratory data analysis with a concise visualization API. - Last verified: 2026-09-04 - **Canonical:** https://gtmstacker.com/registry/tool/observable-plot/ - **Source:** [github · github.com/observablehq](https://github.com/observablehq/plot) - **Tags:** analytics-bi, data-visualization - **Repository:** https://github.com/observablehq/plot ## Is Observable Plot open source? Yes — ISC-licensed. ## How much does Observable Plot cost? It is free to use. ## Can I self-host Observable Plot? Yes — it can be self-hosted. --- Concise grammar-of-graphics on D3 --- # octokit.js > Updated 2026-09-03 · type: tool · category: project-ops · status: active · rev 1 ~7800 stars; complements gh CLI, PyGithub; Official GitHub JS SDK (Node/Deno/Browser). Auth via token/OAuth/App. No ToS risk. - Open source: yes (MIT) - Self-hostable: yes - Pricing model: free - Best for: Developers building applications that interact with GitHub's APIs across browsers, Node.js, and Deno. - Last verified: 2026-09-04 - **Canonical:** https://gtmstacker.com/registry/tool/octokitjs/ - **Source:** [github · github.com/octokit](https://github.com/octokit/octokit.js) - **Tags:** project-ops, project-issue-dev-platforms - **Repository:** https://github.com/octokit/octokit.js ## Is octokit.js open source? Yes — MIT-licensed. ## How much does octokit.js cost? It is free to use. ## Can I self-host octokit.js? Yes — it can be self-hosted. --- ~7800 stars; complements gh CLI, PyGithub; Official GitHub JS SDK (Node/Deno/Browser). Auth via token/OAuth/App. No ToS risk. --- # Office365-REST-Python-Client > Updated 2026-09-03 · type: tool · category: productivity-knowledge · status: active · rev 1 ~1716 stars; complements msgraph-sdk-python; Python client for SharePoint REST + Microsoft Graph (OAuth2 / app registration, client-cert or secret).… - Open source: yes (MIT) - Self-hostable: yes - Pricing model: free - Best for: Python developers integrating with Microsoft 365 and Microsoft Graph services such as SharePoint, Outlook, OneDrive, and Teams. - Last verified: 2026-09-04 - **Canonical:** https://gtmstacker.com/registry/tool/office365-rest-python-client/ - **Source:** [github · github.com/vgrem](https://github.com/vgrem/office365-rest-python-client) - **Tags:** productivity-knowledge, productivity-knowledge-bases - **Repository:** https://github.com/vgrem/office365-rest-python-client ## Is Office365-REST-Python-Client open source? Yes — MIT-licensed. ## How much does Office365-REST-Python-Client cost? It is free to use. ## Can I self-host Office365-REST-Python-Client? Yes — it can be self-hosted. --- ~1716 stars; complements msgraph-sdk-python; Python client for SharePoint REST + Microsoft Graph (OAuth2 / app registration, client-cert or secret). ToS-clean; the most complete community Python option for SharePoint/OneDrive/M365 file ops. --- # Ollama > Updated 2026-09-03 · type: tool · category: ai-infrastructure · status: active · rev 1 Easiest local runtime; don't expose port publicly - Open source: yes (MIT) - Self-hostable: yes - Pricing model: free - Best for: Developers and builders who want to run open-source large language models locally on their own hardware. - Last verified: 2026-09-04 - **Canonical:** https://gtmstacker.com/registry/tool/ollama/ - **Source:** [github · github.com/ollama](https://github.com/ollama/ollama) - **Tags:** ai-infrastructure - **Repository:** https://github.com/ollama/ollama ## Is Ollama open source? Yes — MIT-licensed. ## How much does Ollama cost? It is free to use. ## Can I self-host Ollama? Yes — it can be self-hosted. --- Easiest local runtime; don't expose port publicly --- # One API > Updated 2026-09-03 · type: tool · category: ai-infrastructure · status: active · rev 1 OSS alt to LiteLLM; ~36267 stars; via ossinsight.io - Open source: yes (MIT) - Self-hostable: yes - Pricing model: free - Best for: Organizations and developers who need to manage and redistribute multiple LLM API keys through a unified OpenAI-compatible interface. - Last verified: 2026-09-04 - **Canonical:** https://gtmstacker.com/registry/tool/one-api/ - **Source:** [github · github.com/songquanpeng](https://github.com/songquanpeng/one-api) - **Tags:** ai-infrastructure - **Repository:** https://github.com/songquanpeng/one-api ## Is One API open source? Yes — MIT-licensed. ## How much does One API cost? It is free to use. ## Can I self-host One API? Yes — it can be self-hosted. --- OSS alt to LiteLLM; ~36267 stars; via ossinsight.io --- # Open Interpreter > Updated 2026-09-03 · type: tool · category: workflow-automation · status: active · rev 1 OSS alt to ChatGPT Code Interpreter (local); ~67900 stars; complements cua, self-operating-computer, PyAutoGUI; Apache-2.0. LLM writes+runs code locally to… - Open source: yes (Apache-2.0) - Self-hostable: yes - Pricing model: free - Best for: Developers and AI researchers who want a coding agent that runs code locally in a sandbox from the CLI. - Last verified: 2026-09-04 - **Canonical:** https://gtmstacker.com/registry/tool/open-interpreter/ - **Source:** [github · github.com/OpenInterpreter](https://github.com/OpenInterpreter/open-interpreter) - **Tags:** workflow-automation, generic-web-desktop-automation-engines - **Repository:** https://github.com/OpenInterpreter/open-interpreter ## Is Open Interpreter open source? Yes — Apache-2.0-licensed. ## How much does Open Interpreter cost? It is free to use. ## Can I self-host Open Interpreter? Yes — it can be self-hosted. --- OSS alt to ChatGPT Code Interpreter (local); ~67900 stars; complements cua, self-operating-computer, PyAutoGUI; Apache-2.0. LLM writes+runs code locally to operate the machine (incl. computer-use / OS control). Executes arbitrary code -> sandbox or require confirmation; not a per-platform ToS risk but a local-security risk. --- # Open Mercato > Updated 2026-09-03 · type: tool · category: crm-sales · status: active · rev 1 OSS alt to SAP; ~1580 stars; via openalternative.co - Open source: yes (MIT) - Self-hostable: yes - Pricing model: freemium - Best for: CTOs and developers who want to build professional business apps and backends without vendor lock-in. - Last verified: 2026-09-04 - **Canonical:** https://gtmstacker.com/registry/tool/open-mercato/ - **Source:** [github · github.com/open-mercato](https://github.com/open-mercato/open-mercato) - **Tags:** crm-sales - **Repository:** https://github.com/open-mercato/open-mercato ## Is Open Mercato open source? Yes — MIT-licensed. ## How much does Open Mercato cost? It has a free tier plus paid plans. ## Can I self-host Open Mercato? Yes — it can be self-hosted. --- OSS alt to SAP; ~1580 stars; via openalternative.co --- # OpenAlternative > Updated 2026-09-03 · type: tool · category: product-discovery · status: active · rev 1 Only deployable alt-finder app; +CC0 data list - Open source: yes (AGPL-3.0) - Self-hostable: yes - Pricing model: free - Best for: Developers, businesses, and organizations seeking open-source, self-hostable alternatives to proprietary software to avoid vendor lock-in. - Last verified: 2026-09-04 - **Canonical:** https://gtmstacker.com/registry/tool/openalternative/ - **Source:** [github · github.com/piotrkulpinski](https://github.com/piotrkulpinski/openalternative) - **Tags:** product-discovery, app-product-discovery - **Repository:** https://github.com/piotrkulpinski/openalternative ## Is OpenAlternative open source? Yes — AGPL-3.0-licensed. ## How much does OpenAlternative cost? It is free to use. ## Can I self-host OpenAlternative? Yes — it can be self-hosted. --- Only deployable alt-finder app; +CC0 data list --- # OpenCheck > Updated 2026-09-03 · type: tool · category: prospecting-enrichment · status: active · rev 1 KYB tool over registry DATA; no contact emails - Open source: yes (MIT) - Self-hostable: yes - Pricing model: free - Best for: Compliance professionals and investigators performing KYB due diligence across corporate and beneficial-ownership registries. - Last verified: 2026-09-04 - **Canonical:** https://gtmstacker.com/registry/tool/opencheck/ - **Source:** [github · github.com/StephenAbbott](https://github.com/StephenAbbott/opencheck) - **Tags:** prospecting-enrichment - **Repository:** https://github.com/StephenAbbott/opencheck ## Is OpenCheck open source? Yes — MIT-licensed. ## How much does OpenCheck cost? It is free to use. ## Can I self-host OpenCheck? Yes — it can be self-hosted. --- KYB tool over registry DATA; no contact emails --- # OpenFlow > Updated 2026-09-03 · type: tool · category: lead-capture · status: active · rev 1 Only lead-capture-specific OSS; young; rest collapse into covered form/page builders - Open source: yes (GPL-3.0) - Self-hostable: yes - Pricing model: free - Best for: Startups and SMEs building lead-generation landing-page forms as an alternative to Typeform. - Last verified: 2026-09-04 - **Canonical:** https://gtmstacker.com/registry/tool/openflow/ - **Source:** [github · github.com/vidual-labs](https://github.com/vidual-labs/openflow) - **Tags:** lead-capture, lead-capture-forms - **Repository:** https://github.com/vidual-labs/openflow ## Is OpenFlow open source? Yes — GPL-3.0-licensed. ## How much does OpenFlow cost? It is free to use. ## Can I self-host OpenFlow? Yes — it can be self-hosted. --- Only lead-capture-specific OSS; young; rest collapse into covered form/page builders --- # OpenLLMetry > Updated 2026-09-03 · type: tool · category: ai-infrastructure · status: active · rev 1 Cleanest license; OTel instrumentation (BYO backend) - Open source: yes (Apache-2.0) - Self-hostable: yes - Pricing model: free - Best for: Development teams building GenAI/LLM applications who need OpenTelemetry-based tracing and observability in their existing monitoring stack. - Last verified: 2026-09-04 - **Canonical:** https://gtmstacker.com/registry/tool/openllmetry/ - **Source:** [github · github.com/traceloop](https://github.com/traceloop/openllmetry) - **Tags:** ai-infrastructure - **Repository:** https://github.com/traceloop/openllmetry ## Is OpenLLMetry open source? Yes — Apache-2.0-licensed. ## How much does OpenLLMetry cost? It is free to use. ## Can I self-host OpenLLMetry? Yes — it can be self-hosted. --- Cleanest license; OTel instrumentation (BYO backend) --- # OpenMetadata > Updated 2026-09-03 · type: tool · category: integration-orchestration · status: active · rev 1 OSS alt to Collibra; ~14782 stars; via ossinsight.io - Open source: yes (Apache-2.0) - Self-hostable: yes - Pricing model: freemium - Best for: Data professionals, AI assistants, and agents needing trusted, governed metadata and data context (Apache-2.0 OSS; managed enterprise features via Collate). - Last verified: 2026-09-04 - **Canonical:** https://gtmstacker.com/registry/tool/openmetadata/ - **Source:** [github · github.com/open-metadata](https://github.com/open-metadata/OpenMetadata) - **Tags:** integration-orchestration - **Repository:** https://github.com/open-metadata/OpenMetadata ## Is OpenMetadata open source? Yes — Apache-2.0-licensed. ## How much does OpenMetadata cost? It has a free tier plus paid plans. ## Can I self-host OpenMetadata? Yes — it can be self-hosted. --- OSS alt to Collibra; ~14782 stars; via ossinsight.io --- # OpenPanel > Updated 2026-09-03 · type: tool · category: analytics-bi · status: active · rev 1 OSS alt to Google Analytics; ~6296 stars; via openalternative.co - Open source: yes (AGPL-3.0) - Self-hostable: yes - Best for: Developers and organizations seeking privacy-focused, open-source product analytics as an alternative to Mixpanel and Google Analytics. - Last verified: 2026-09-04 - **Canonical:** https://gtmstacker.com/registry/tool/openpanel/ - **Source:** [github · github.com/openpanel-dev](https://github.com/openpanel-dev/openpanel) - **Tags:** analytics-bi - **Repository:** https://github.com/openpanel-dev/openpanel ## Is OpenPanel open source? Yes — AGPL-3.0-licensed. ## How much does OpenPanel cost? It is open source — self-hosting is free; you pay only for your own infrastructure. ## Can I self-host OpenPanel? Yes — it can be self-hosted. --- OSS alt to Google Analytics; ~6296 stars; via openalternative.co --- # OpenRPA > Updated 2026-09-03 · type: tool · category: workflow-automation · status: active · rev 1 Most complete OSI RPA; Windows-only; opt-out telemetry - Open source: yes (MPL-2.0) - Self-hostable: yes - Pricing model: free - Best for: Organizations seeking to automate repetitive business processes across multiple machines with an open-source RPA platform. - Last verified: 2026-09-04 - **Canonical:** https://gtmstacker.com/registry/tool/openrpa/ - **Source:** [github · github.com/open-rpa](https://github.com/open-rpa/openrpa) - **Tags:** workflow-automation - **Repository:** https://github.com/open-rpa/openrpa ## Is OpenRPA open source? Yes — MPL-2.0-licensed. ## How much does OpenRPA cost? It is free to use. ## Can I self-host OpenRPA? Yes — it can be self-hosted. --- Most complete OSI RPA; Windows-only; opt-out telemetry --- # OpenSandbox > Updated 2026-09-03 · type: tool · category: ai-infrastructure · status: active · rev 1 General-purpose sandbox platform for coding/GUI agents, code execution, evaluation, and RL training; Python/JS/Java/.NET/Go SDKs, CLI, MCP and OpenAPI; Docker… - Open source: yes (Apache-2.0) - Self-hostable: yes - Pricing model: free - Best for: Developers building AI agent systems needing a general-purpose sandbox for coding/GUI agents, code execution, evaluation, and RL training. - Last verified: 2026-09-04 - **Canonical:** https://gtmstacker.com/registry/tool/opensandbox/ - **Source:** [github · github.com/opensandbox-group](https://github.com/opensandbox-group/OpenSandbox) - **Tags:** ai-infrastructure - **Repository:** https://github.com/opensandbox-group/OpenSandbox ## Is OpenSandbox open source? Yes — Apache-2.0-licensed. ## How much does OpenSandbox cost? It is free to use. ## Can I self-host OpenSandbox? Yes — it can be self-hosted. --- General-purpose sandbox platform for coding/GUI agents, code execution, evaluation, and RL training; Python/JS/Java/.NET/Go SDKs, CLI, MCP and OpenAPI; Docker and Kubernetes runtimes; command/filesystem/code-interpreter/desktop environments; egress policies, credential vault, signed images, and gVisor/Kata/Firecracker isolation options; ~13.8k stars --- # OpenSERP > Updated 2026-09-03 · type: tool · category: data-scraping · status: active · rev 1 OSS alt to SearchAPI; ~1235 stars; via openalternative.co - Open source: yes (MIT) - Self-hostable: yes - Pricing model: free - Best for: Developers, AI engineers, and SEO professionals needing programmatic access to search-engine results for AI, SEO, and automation. - Last verified: 2026-09-04 - **Canonical:** https://gtmstacker.com/registry/tool/openserp/ - **Source:** [github · github.com/karust](https://github.com/karust/openserp) - **Tags:** data-scraping, data-mining-scraping - **Repository:** https://github.com/karust/openserp ## Is OpenSERP open source? Yes — MIT-licensed. ## How much does OpenSERP cost? It is free to use. ## Can I self-host OpenSERP? Yes — it can be self-hosted. --- OSS alt to SearchAPI; ~1235 stars; via openalternative.co --- # OpenWebAnalytics > Updated 2026-09-03 · type: tool · category: analytics-bi · status: active · rev 1 OSS alt to Google Analytics; ~2682 stars; via openalternative.co - Open source: yes (GPL-2.0) - Self-hostable: yes - Pricing model: free - Best for: Website and application owners who want privacy-respecting analytics independent of commercial vendors like Google Analytics. - Last verified: 2026-09-04 - **Canonical:** https://gtmstacker.com/registry/tool/openwebanalytics/ - **Source:** [github · github.com/Open-Web-Analytics](https://github.com/Open-Web-Analytics/Open-Web-Analytics) - **Tags:** analytics-bi - **Repository:** https://github.com/Open-Web-Analytics/Open-Web-Analytics ## Is OpenWebAnalytics open source? Yes — GPL-2.0-licensed. ## How much does OpenWebAnalytics cost? It is free to use. ## Can I self-host OpenWebAnalytics? Yes — it can be self-hosted. --- OSS alt to Google Analytics; ~2682 stars; via openalternative.co --- # OpnForm > Updated 2026-09-03 · type: tool · category: lead-capture · status: active · rev 1 OSS alt to Google Forms; ~3547 stars; via openalternative.co - Open source: yes (AGPL-3.0) - Self-hostable: yes - Pricing model: freemium - Best for: Organizations and individuals, from small teams to enterprises, wanting to build forms without coding. - Last verified: 2026-09-04 - **Canonical:** https://gtmstacker.com/registry/tool/opnform/ - **Source:** [github · github.com/JhumanJ](https://github.com/JhumanJ/opnform) - **Tags:** lead-capture, lead-capture-forms - **Repository:** https://github.com/JhumanJ/opnform ## Is OpnForm open source? Yes — AGPL-3.0-licensed. ## How much does OpnForm cost? It has a free tier plus paid plans. ## Can I self-host OpnForm? Yes — it can be self-hosted. --- OSS alt to Google Forms; ~3547 stars; via openalternative.co --- # Osclass > Updated 2026-09-03 · type: tool · category: product-discovery · status: active · rev 1 Standalone PHP classifieds; legacy code - Open source: yes (GPL-3.0) - Self-hostable: yes - Pricing model: free - Best for: Individuals and organizations who want to operate their own self-hosted classifieds marketplace. - Last verified: 2026-09-04 - **Canonical:** https://gtmstacker.com/registry/tool/osclass/ - **Source:** [github · github.com/mindstellar](https://github.com/mindstellar/Osclass) - **Tags:** product-discovery, app-product-discovery - **Repository:** https://github.com/mindstellar/Osclass ## Is Osclass open source? Yes — GPL-3.0-licensed. ## How much does Osclass cost? It is free to use. ## Can I self-host Osclass? Yes — it can be self-hosted. --- Standalone PHP classifieds; legacy code --- # osmnx > Updated 2026-09-03 · type: tool · category: seo-research · status: active · rev 1 ~5800 stars; complements python-overpy (raw Overpass), yelpapi; Open-data OSM tooling over the public Overpass/Nominatim APIs. Open protocol/open data (ODbL)… - Open source: yes (MIT) - Self-hostable: yes - Pricing model: free - Best for: Researchers, urban planners, and analysts who study street networks and geospatial features using Python. - Last verified: 2026-09-04 - **Canonical:** https://gtmstacker.com/registry/tool/osmnx/ - **Source:** [github · github.com/gboeing](https://github.com/gboeing/osmnx) - **Tags:** seo-research, maps-local-reviews - **Repository:** https://github.com/gboeing/osmnx ## Is osmnx open source? Yes — MIT-licensed. ## How much does osmnx cost? It is free to use. ## Can I self-host osmnx? Yes — it can be self-hosted. --- ~5800 stars; complements python-overpy (raw Overpass), yelpapi; Open-data OSM tooling over the public Overpass/Nominatim APIs. Open protocol/open data (ODbL) — no ToS/ban risk; respect Overpass usage policy. --- # Payload CMS > Updated 2026-09-03 · type: tool · category: website-cms · status: active · rev 1 OSS alt to Contentful/Strapi; ~44044 stars; via ossinsight.io - Open source: yes (MIT) - Self-hostable: yes - Pricing model: free - Best for: Developers building content-managed applications who want an open-source, self-hosted, Next.js-native CMS/framework. - Last verified: 2026-09-04 - **Canonical:** https://gtmstacker.com/registry/tool/payload-cms/ - **Source:** [github · github.com/payloadcms](https://github.com/payloadcms/payload) - **Tags:** website-cms, website-builders-cms - **Repository:** https://github.com/payloadcms/payload ## Is Payload CMS open source? Yes — MIT-licensed. ## How much does Payload CMS cost? It is free to use. ## Can I self-host Payload CMS? Yes — it can be self-hosted. --- OSS alt to Contentful/Strapi; ~44044 stars; via ossinsight.io --- # pgvector > Updated 2026-09-03 · type: tool · category: ai-infrastructure · status: active · rev 1 Cleanest profile; no telemetry/CVEs; Postgres extension - Open source: yes (PostgreSQL License) - Self-hostable: yes - Pricing model: free - Best for: Database developers and engineers who need to store and query vector embeddings alongside relational data in Postgres. - Last verified: 2026-09-04 - **Canonical:** https://gtmstacker.com/registry/tool/pgvector/ - **Source:** [github · github.com/pgvector](https://github.com/pgvector/pgvector) - **Tags:** ai-infrastructure - **Repository:** https://github.com/pgvector/pgvector ## Is pgvector open source? Yes — PostgreSQL License-licensed. ## How much does pgvector cost? It is free to use. ## Can I self-host pgvector? Yes — it can be self-hosted. --- Cleanest profile; no telemetry/CVEs; Postgres extension --- # Plotly Dash > Updated 2026-09-03 · type: tool · category: analytics-bi · status: active · rev 1 ~24371 stars; via ossinsight.io - Open source: yes (MIT) - Self-hostable: yes - Pricing model: freemium - Best for: Data scientists and analysts who want to build ML and data-science web apps in Python without writing JavaScript. - Last verified: 2026-09-04 - **Canonical:** https://gtmstacker.com/registry/tool/plotly-dash/ - **Source:** [github · github.com/plotly](https://github.com/plotly/dash) - **Tags:** analytics-bi, data-visualization - **Repository:** https://github.com/plotly/dash ## Is Plotly Dash open source? Yes — MIT-licensed. ## How much does Plotly Dash cost? It has a free tier plus paid plans. ## Can I self-host Plotly Dash? Yes — it can be self-hosted. --- ~24371 stars; via ossinsight.io --- # Plotly.py > Updated 2026-09-03 · type: tool · category: analytics-bi · status: active · rev 1 Interactive notebook viz; ties to Dash - Open source: yes (MIT) - Self-hostable: yes - Pricing model: free - Best for: Developers and data scientists creating interactive, browser-based visualizations in Python across environments like Jupyter and web apps. - Last verified: 2026-09-04 - **Canonical:** https://gtmstacker.com/registry/tool/plotlypy/ - **Source:** [github · github.com/plotly](https://github.com/plotly/plotly.py) - **Tags:** analytics-bi, data-visualization - **Repository:** https://github.com/plotly/plotly.py ## Is Plotly.py open source? Yes — MIT-licensed. ## How much does Plotly.py cost? It is free to use. ## Can I self-host Plotly.py? Yes — it can be self-hosted. --- Interactive notebook viz; ties to Dash --- # Plunk > Updated 2026-09-03 · type: tool · category: marketing-automation · status: active · rev 1 OSS alt to Resend; ~5347 stars; via openalternative.co - Open source: yes (AGPL-3.0) - Self-hostable: yes - Pricing model: usage - Best for: Organizations seeking an open-source alternative to email platforms like SendGrid, Resend, or Mailgun for transactional emails, campaigns, and automation. - Last verified: 2026-09-04 - **Canonical:** https://gtmstacker.com/registry/tool/plunk/ - **Source:** [github · github.com/useplunk](https://github.com/useplunk/plunk) - **Tags:** marketing-automation, marketing-automation-email - **Repository:** https://github.com/useplunk/plunk ## Is Plunk open source? Yes — AGPL-3.0-licensed. ## How much does Plunk cost? Usage-based pricing. ## Can I self-host Plunk? Yes — it can be self-hosted. --- OSS alt to Resend; ~5347 stars; via openalternative.co --- # Pneumatic Workflow > Updated 2026-09-03 · type: tool · category: workflow-automation · status: active · rev 1 Closest standalone approval app - Open source: yes (Apache-2.0) - Self-hostable: yes - Pricing model: free - Best for: Businesses of any size needing lightweight workflow automation and task management. - Last verified: 2026-09-04 - **Canonical:** https://gtmstacker.com/registry/tool/pneumatic-workflow/ - **Source:** [github · github.com/pneumaticapp](https://github.com/pneumaticapp/pneumaticworkflow) - **Tags:** workflow-automation - **Repository:** https://github.com/pneumaticapp/pneumaticworkflow ## Is Pneumatic Workflow open source? Yes — Apache-2.0-licensed. ## How much does Pneumatic Workflow cost? It is free to use. ## Can I self-host Pneumatic Workflow? Yes — it can be self-hosted. --- Closest standalone approval app --- # Portkey Gateway > Updated 2026-09-03 · type: tool · category: ai-infrastructure · status: active · rev 1 OSS alt to LiteLLM; ~12670 stars; via ossinsight.io - Open source: yes (MIT) - Self-hostable: yes - Pricing model: freemium - Best for: Developers and organizations integrating many LLM providers through a single, fast, reliable API gateway. - Last verified: 2026-09-04 - **Canonical:** https://gtmstacker.com/registry/tool/portkey-gateway/ - **Source:** [github · github.com/Portkey-AI](https://github.com/Portkey-AI/gateway) - **Tags:** ai-infrastructure - **Repository:** https://github.com/Portkey-AI/gateway ## Is Portkey Gateway open source? Yes — MIT-licensed. ## How much does Portkey Gateway cost? It has a free tier plus paid plans. ## Can I self-host Portkey Gateway? Yes — it can be self-hosted. --- OSS alt to LiteLLM; ~12670 stars; via ossinsight.io --- # Postiz > Updated 2026-09-03 · type: tool · category: content-copywriting · status: active · rev 1 OSS alt to Buffer; ~34410 stars; via openalternative.co - Open source: yes (AGPL-3.0) - Self-hostable: yes - Pricing model: freemium - Best for: Content creators, marketers, and teams managing social media posts to build an audience and grow their business (self-hostable; a paid hosted version exists). - Last verified: 2026-09-04 - **Canonical:** https://gtmstacker.com/registry/tool/postiz/ - **Source:** [github · github.com/gitroomhq](https://github.com/gitroomhq/postiz-app) - **Tags:** content-copywriting, content-factory-orchestration - **Repository:** https://github.com/gitroomhq/postiz-app ## Is Postiz open source? Yes — AGPL-3.0-licensed. ## How much does Postiz cost? It has a free tier plus paid plans. ## Can I self-host Postiz? Yes — it can be self-hosted. --- OSS alt to Buffer; ~34410 stars; via openalternative.co --- # PRAW > Updated 2026-09-03 · type: tool · category: social-community · status: active · rev 1 ~4218 stars; complements asyncpraw, redditwarp; OAuth2 (script/web/installed app) against the sanctioned Reddit API; enforces Reddit rate-limit rules… - Open source: yes (BSD-2-Clause) - Self-hostable: yes - Pricing model: free - Best for: Python developers who need programmatic access to Reddit's API. - Last verified: 2026-09-04 - **Canonical:** https://gtmstacker.com/registry/tool/praw/ - **Source:** [github · github.com/praw-dev](https://github.com/praw-dev/praw) - **Tags:** social-community, social-microblogging-communities - **Repository:** https://github.com/praw-dev/praw ## Is PRAW open source? Yes — BSD-2-Clause-licensed. ## How much does PRAW cost? It is free to use. ## Can I self-host PRAW? Yes — it can be self-hosted. --- ~4218 stars; complements asyncpraw, redditwarp; OAuth2 (script/web/installed app) against the sanctioned Reddit API; enforces Reddit rate-limit rules internally. De-facto standard, ToS-compliant. Note Reddit's 2023 paid-API terms for high-volume commercial use.; via GitHub cross-ref, ossinsight.io --- # Promptfoo > Updated 2026-09-03 · type: tool · category: ai-infrastructure · status: active · rev 1 Eval + red-teaming; CI-friendly (verified) - Open source: yes (MIT) - Self-hostable: yes - Pricing model: free - Best for: Developer-first teams building and securing LLM applications who need to test prompts, evaluate models, and find vulnerabilities locally. - Last verified: 2026-09-04 - **Canonical:** https://gtmstacker.com/registry/tool/promptfoo/ - **Source:** [github · github.com/promptfoo](https://github.com/promptfoo/promptfoo) - **Tags:** ai-infrastructure - **Repository:** https://github.com/promptfoo/promptfoo ## Is Promptfoo open source? Yes — MIT-licensed. ## How much does Promptfoo cost? It is free to use. ## Can I self-host Promptfoo? Yes — it can be self-hosted. --- Eval + red-teaming; CI-friendly (verified) --- # proton-bridge > Updated 2026-09-03 · type: tool · category: email-outbound · status: active · rev 1 ~1500 stars; complements hydroxide; Official Proton Mail Bridge; exposes local IMAP/SMTP for standard clients. Auth via Proton login + keychain. Requires paid… - Open source: yes (GPL-3.0) - Self-hostable: yes - Best for: Users who need to connect their Proton Mail account to third-party email clients via local IMAP/SMTP servers. - Last verified: 2026-09-04 - **Canonical:** https://gtmstacker.com/registry/tool/proton-bridge/ - **Source:** [github · github.com/ProtonMail](https://github.com/ProtonMail/proton-bridge) - **Tags:** email-outbound, email-providers-protocols - **Repository:** https://github.com/ProtonMail/proton-bridge ## Is proton-bridge open source? Yes — GPL-3.0-licensed. ## How much does proton-bridge cost? It is open source — self-hosting is free; you pay only for your own infrastructure. ## Can I self-host proton-bridge? Yes — it can be self-hosted. --- ~1500 stars; complements hydroxide; Official Proton Mail Bridge; exposes local IMAP/SMTP for standard clients. Auth via Proton login + keychain. Requires paid Proton plan. No ToS risk (sanctioned). --- # Puck > Updated 2026-09-03 · type: tool · category: website-cms · status: active · rev 1 GATE PASS; React embeddable editor - Open source: yes (MIT) - Self-hostable: yes - Pricing model: free - Best for: Developers building custom drag-and-drop editing experiences within their own React applications. - Last verified: 2026-09-04 - **Canonical:** https://gtmstacker.com/registry/tool/puck/ - **Source:** [github · github.com/puckeditor](https://github.com/puckeditor/puck) - **Tags:** website-cms, website-builders-cms - **Repository:** https://github.com/puckeditor/puck ## Is Puck open source? Yes — MIT-licensed. ## How much does Puck cost? It is free to use. ## Can I self-host Puck? Yes — it can be self-hosted. --- GATE PASS; React embeddable editor --- # pyairtable > Updated 2026-09-03 · type: tool · category: productivity-knowledge · status: active · rev 1 ~892 stars; complements airtable.js; Python client for the OFFICIAL Airtable REST API (personal access token / OAuth). ToS-clean; de-facto Python SDK.… - Open source: yes (MIT) - Self-hostable: yes - Pricing model: free - Best for: Python developers who need programmatic access to Airtable data. - Last verified: 2026-09-04 - **Canonical:** https://gtmstacker.com/registry/tool/pyairtable/ - **Source:** [github · github.com/gtalarico](https://github.com/gtalarico/pyairtable) - **Tags:** productivity-knowledge, productivity-knowledge-bases - **Repository:** https://github.com/gtalarico/pyairtable ## Is pyairtable open source? Yes — MIT-licensed. ## How much does pyairtable cost? It is free to use. ## Can I self-host pyairtable? Yes — it can be self-hosted. --- ~892 stars; complements airtable.js; Python client for the OFFICIAL Airtable REST API (personal access token / OAuth). ToS-clean; de-facto Python SDK. Airtable API rate limit ~5 req/s per base. --- # Pydantic AI > Updated 2026-09-03 · type: tool · category: ai-infrastructure · status: active · rev 1 OSS alt to LangGraph; ~19148 stars; via ossinsight.io - Open source: yes (MIT) - Self-hostable: yes - Pricing model: free - Best for: Python developers building AI agents who want type safety, multi-model compatibility, and production-grade observability. - Last verified: 2026-09-04 - **Canonical:** https://gtmstacker.com/registry/tool/pydantic-ai/ - **Source:** [github · github.com/pydantic](https://github.com/pydantic/pydantic-ai) - **Tags:** ai-infrastructure - **Repository:** https://github.com/pydantic/pydantic-ai ## Is Pydantic AI open source? Yes — MIT-licensed. ## How much does Pydantic AI cost? It is free to use. ## Can I self-host Pydantic AI? Yes — it can be self-hosted. --- OSS alt to LangGraph; ~19148 stars; via ossinsight.io --- # PyGithub > Updated 2026-09-03 · type: tool · category: project-ops · status: active · rev 1 ~7800 stars; complements gh CLI, octokit.js; Official-API client. Auth via PAT/OAuth/GitHub App. LGPL-3.0 copyleft (weak). No ToS risk; REST rate limits apply. - Open source: yes (LGPL-3.0) - Self-hostable: yes - Pricing model: free - Best for: Python developers who need to programmatically manage GitHub resources via the GitHub REST API. - Last verified: 2026-09-04 - **Canonical:** https://gtmstacker.com/registry/tool/pygithub/ - **Source:** [github · github.com/PyGithub](https://github.com/PyGithub/PyGithub) - **Tags:** project-ops, project-issue-dev-platforms - **Repository:** https://github.com/PyGithub/PyGithub ## Is PyGithub open source? Yes — LGPL-3.0-licensed. ## How much does PyGithub cost? It is free to use. ## Can I self-host PyGithub? Yes — it can be self-hosted. --- ~7800 stars; complements gh CLI, octokit.js; Official-API client. Auth via PAT/OAuth/GitHub App. LGPL-3.0 copyleft (weak). No ToS risk; REST rate limits apply. --- # PyOD > Updated 2026-09-03 · type: tool · category: data-scraping · status: active · rev 1 ~9953 stars; via ossinsight.io - Open source: yes (BSD-2-Clause) - Self-hostable: yes - Pricing model: free - Best for: Machine learning practitioners and researchers who need to detect anomalies across multiple data modalities without building detection algorithms from scratch. - Last verified: 2026-09-04 - **Canonical:** https://gtmstacker.com/registry/tool/pyod/ - **Source:** [github · github.com/yzhao062](https://github.com/yzhao062/pyod) - **Tags:** data-scraping, data-mining-scraping - **Repository:** https://github.com/yzhao062/pyod ## Is PyOD open source? Yes — BSD-2-Clause-licensed. ## How much does PyOD cost? It is free to use. ## Can I self-host PyOD? Yes — it can be self-hosted. --- ~9953 stars; via ossinsight.io --- # python-amazon-sp-api > Updated 2026-09-03 · type: tool · category: commerce-payments · status: active · rev 1 ~671 stars; complements amzn/selling-partner-api-models (official OpenAPI models); De-facto Python client for the sanctioned Amazon SP-API. Auth via LWA OAuth… - Open source: yes (MIT) - Self-hostable: yes - Pricing model: free - Best for: Developers and businesses connecting to Amazon's marketplace for automation and data management via the Selling Partner API. - Last verified: 2026-09-04 - **Canonical:** https://gtmstacker.com/registry/tool/python-amazon-sp-api/ - **Source:** [github · github.com/saleweaver](https://github.com/saleweaver/python-amazon-sp-api) - **Tags:** commerce-payments, commerce-marketplaces - **Repository:** https://github.com/saleweaver/python-amazon-sp-api ## Is python-amazon-sp-api open source? Yes — MIT-licensed. ## How much does python-amazon-sp-api cost? It is free to use. ## Can I self-host python-amazon-sp-api? Yes — it can be self-hosted. --- ~671 stars; complements amzn/selling-partner-api-models (official OpenAPI models); De-facto Python client for the sanctioned Amazon SP-API. Auth via LWA OAuth + AWS IAM/role. No ToS risk (official API); respect SP-API usage plans/rate limits. --- # python-asana > Updated 2026-09-03 · type: tool · category: project-ops · status: active · rev 1 ~335 stars; complements py-trello, clickupython, monday-sdk-js; Official Asana SDK (300+ endpoints). Auth via PAT/OAuth. No ToS risk. - Open source: yes (MIT) - Self-hostable: yes - Pricing model: free - Best for: Developers building Python applications that integrate with the Asana API. - Last verified: 2026-09-04 - **Canonical:** https://gtmstacker.com/registry/tool/python-asana/ - **Source:** [github · github.com/Asana](https://github.com/Asana/python-asana) - **Tags:** project-ops, project-issue-dev-platforms - **Repository:** https://github.com/Asana/python-asana ## Is python-asana open source? Yes — MIT-licensed. ## How much does python-asana cost? It is free to use. ## Can I self-host python-asana? Yes — it can be self-hosted. --- ~335 stars; complements py-trello, clickupython, monday-sdk-js; Official Asana SDK (300+ endpoints). Auth via PAT/OAuth. No ToS risk. --- # python-gitlab > Updated 2026-09-03 · type: tool · category: project-ops · status: active · rev 1 ~2500 stars; complements glab CLI; Official-API Python client, bundles a CLI. Auth via PAT/OAuth. LGPL-3.0. No ToS risk. - Open source: yes (LGPL-3.0) - Self-hostable: yes - Pricing model: free - Best for: Developers who need programmatic Pythonic access to manage GitLab resources via its APIs. - Last verified: 2026-09-04 - **Canonical:** https://gtmstacker.com/registry/tool/python-gitlab/ - **Source:** [github · github.com/python-gitlab](https://github.com/python-gitlab/python-gitlab) - **Tags:** project-ops, project-issue-dev-platforms - **Repository:** https://github.com/python-gitlab/python-gitlab ## Is python-gitlab open source? Yes — LGPL-3.0-licensed. ## How much does python-gitlab cost? It is free to use. ## Can I self-host python-gitlab? Yes — it can be self-hosted. --- ~2500 stars; complements glab CLI; Official-API Python client, bundles a CLI. Auth via PAT/OAuth. LGPL-3.0. No ToS risk. --- # python-o365 > Updated 2026-09-03 · type: tool · category: email-outbound · status: active · rev 1 ~1900 stars; complements msgraph-sdk-python, exchangelib; Ergonomic wrapper over Microsoft Graph. Auth via OAuth2. No ToS risk; friendlier than raw Graph SDK. - Open source: yes (Apache-2.0) - Self-hostable: yes - Pricing model: free - Best for: Python developers who need to interact with Microsoft 365 services in a Pythonic way. - Last verified: 2026-09-04 - **Canonical:** https://gtmstacker.com/registry/tool/python-o365/ - **Source:** [github · github.com/O365](https://github.com/O365/python-o365) - **Tags:** email-outbound, email-providers-protocols - **Repository:** https://github.com/O365/python-o365 ## Is python-o365 open source? Yes — Apache-2.0-licensed. ## How much does python-o365 cost? It is free to use. ## Can I self-host python-o365? Yes — it can be self-hosted. --- ~1900 stars; complements msgraph-sdk-python, exchangelib; Ergonomic wrapper over Microsoft Graph. Auth via OAuth2. No ToS risk; friendlier than raw Graph SDK. --- # python-slack-sdk > Updated 2026-09-03 · type: tool · category: chat-helpdesk · status: active · rev 1 ~4000 stars; complements bolt-python; Official Slack SDK (Web API, Socket Mode, SCIM, audit logs). Auth via tokens/OAuth. No ToS risk. Lower-level than Bolt. - Open source: yes (MIT) - Self-hostable: yes - Pricing model: free - Best for: Developers building custom Slack apps or integrating third-party services into Slack workflows with Python. - Last verified: 2026-09-04 - **Canonical:** https://gtmstacker.com/registry/tool/python-slack-sdk/ - **Source:** [github · github.com/slackapi](https://github.com/slackapi/python-slack-sdk) - **Tags:** chat-helpdesk, messaging-chat-platforms - **Repository:** https://github.com/slackapi/python-slack-sdk ## Is python-slack-sdk open source? Yes — MIT-licensed. ## How much does python-slack-sdk cost? It is free to use. ## Can I self-host python-slack-sdk? Yes — it can be self-hosted. --- ~4000 stars; complements bolt-python; Official Slack SDK (Web API, Socket Mode, SCIM, audit logs). Auth via tokens/OAuth. No ToS risk. Lower-level than Bolt. --- # python-telegram-bot > Updated 2026-09-03 · type: tool · category: chat-helpdesk · status: active · rev 1 ~29400 stars; complements Telethon, aiogram; De-facto standard on official Telegram Bot API. Auth via bot token. No ToS risk (sanctioned Bot API). LGPL-3.0.;… - Open source: yes (LGPL-3.0) - Self-hostable: yes - Pricing model: free - Best for: Developers building chatbots and applications that interact with Telegram's Bot API using Python. - Last verified: 2026-09-04 - **Canonical:** https://gtmstacker.com/registry/tool/python-telegram-bot/ - **Source:** [github · github.com/python-telegram-bot](https://github.com/python-telegram-bot/python-telegram-bot) - **Tags:** chat-helpdesk, messaging-chat-platforms - **Repository:** https://github.com/python-telegram-bot/python-telegram-bot ## Is python-telegram-bot open source? Yes — LGPL-3.0-licensed. ## How much does python-telegram-bot cost? It is free to use. ## Can I self-host python-telegram-bot? Yes — it can be self-hosted. --- ~29400 stars; complements Telethon, aiogram; De-facto standard on official Telegram Bot API. Auth via bot token. No ToS risk (sanctioned Bot API). LGPL-3.0.; via ossinsight.io, GitHub cross-ref --- # pythreads > Updated 2026-09-03 · type: tool · category: social-community · status: active · rev 1 ~72 stars; complements threads-py, threads-api; OAuth2 against Meta's SANCTIONED Threads API (Graph-style) — covers all published endpoints. ToS-clean… - Open source: yes (MIT) - Self-hostable: yes - Pricing model: free - Best for: Developers building applications that integrate programmatically with Meta's Threads social platform. - Last verified: 2026-09-04 - **Canonical:** https://gtmstacker.com/registry/tool/pythreads/ - **Source:** [github · github.com/marclove](https://github.com/marclove/pythreads) - **Tags:** social-community, social-microblogging-communities - **Repository:** https://github.com/marclove/pythreads ## Is pythreads open source? Yes — MIT-licensed. ## How much does pythreads cost? It is free to use. ## Can I self-host pythreads? Yes — it can be self-hosted. --- ~72 stars; complements threads-py, threads-api; OAuth2 against Meta's SANCTIONED Threads API (Graph-style) — covers all published endpoints. ToS-clean official approach; the correct modern replacement for the dead reverse-engineered libs. Requires a Meta developer app. --- # quizco > Updated 2026-09-03 · type: tool · category: lead-capture · status: active · rev 1 Only real OSS quiz builder; education-positioned not lead-gen - Open source: yes (MIT) - Self-hostable: yes - Pricing model: free - Best for: Educators and administrators who build AI-generated quizzes and track student attempts and statistics. - Last verified: 2026-09-04 - **Canonical:** https://gtmstacker.com/registry/tool/quizco/ - **Source:** [github · github.com/vishwajeetraj11](https://github.com/vishwajeetraj11/quizco-frontend) - **Tags:** lead-capture, lead-capture-forms - **Repository:** https://github.com/vishwajeetraj11/quizco-frontend ## Is quizco open source? Yes — MIT-licensed. ## How much does quizco cost? It is free to use. ## Can I self-host quizco? Yes — it can be self-hosted. --- Only real OSS quiz builder; education-positioned not lead-gen --- # Ragas > Updated 2026-09-03 · type: tool · category: ai-infrastructure · status: active · rev 1 RAG-specific metrics (verified) - Open source: yes (Apache-2.0) - Self-hostable: yes - Pricing model: free - Best for: Developers and teams building LLM applications who need to evaluate and optimize their systems with objective metrics. - Last verified: 2026-09-04 - **Canonical:** https://gtmstacker.com/registry/tool/ragas/ - **Source:** [github · github.com/explodinggradients](https://github.com/explodinggradients/ragas) - **Tags:** ai-infrastructure - **Repository:** https://github.com/explodinggradients/ragas ## Is Ragas open source? Yes — Apache-2.0-licensed. ## How much does Ragas cost? It is free to use. ## Can I self-host Ragas? Yes — it can be self-hosted. --- RAG-specific metrics (verified) --- # Rallly > Updated 2026-09-03 · type: tool · category: meetings-scheduling · status: active · rev 1 Group availability polling; no lead routing - Open source: yes (AGPL-3.0) - Self-hostable: yes - Pricing model: freemium - Best for: Groups and organizations that need to schedule group meetings without back-and-forth coordination. - Last verified: 2026-09-04 - **Canonical:** https://gtmstacker.com/registry/tool/rallly/ - **Source:** [github · github.com/lukevella](https://github.com/lukevella/rallly) - **Tags:** meetings-scheduling - **Repository:** https://github.com/lukevella/rallly ## Is Rallly open source? Yes — AGPL-3.0-licensed. ## How much does Rallly cost? It has a free tier plus paid plans. ## Can I self-host Rallly? Yes — it can be self-hosted. --- Group availability polling; no lead routing --- # Rasa > Updated 2026-09-03 · type: tool · category: chat-helpdesk · status: active · rev 1 Reference NLU framework; maintenance mode (CALM shift) - Open source: yes (Apache-2.0) - Self-hostable: yes - Pricing model: free - Best for: Teams building contextual conversational assistants and chatbots across multiple messaging channels. - Last verified: 2026-09-04 - **Canonical:** https://gtmstacker.com/registry/tool/rasa/ - **Source:** [github · github.com/RasaHQ](https://github.com/RasaHQ/rasa) - **Tags:** chat-helpdesk, chat-bots-helpdesk - **Repository:** https://github.com/RasaHQ/rasa ## Is Rasa open source? Yes — Apache-2.0-licensed. ## How much does Rasa cost? It is free to use. ## Can I self-host Rasa? Yes — it can be self-hosted. --- Reference NLU framework; maintenance mode (CALM shift) --- # Ray > Updated 2026-09-03 · type: tool · category: ai-infrastructure · status: active · rev 1 OSS alt to proprietary GPU-orchestration platforms; ~43500 stars; complements Celery, SkyPilot; General distributed-compute engine; also serves the… - Open source: yes (Apache-2.0) - Self-hostable: yes - Pricing model: free - Best for: Developers scaling Python and AI applications from a laptop to a cluster for computationally demanding workloads. - Last verified: 2026-09-04 - **Canonical:** https://gtmstacker.com/registry/tool/ray/ - **Source:** [github · github.com/ray-project](https://github.com/ray-project/ray) - **Tags:** ai-infrastructure, content-factory-orchestration - **Repository:** https://github.com/ray-project/ray ## Is Ray open source? Yes — Apache-2.0-licensed. ## How much does Ray cost? It is free to use. ## Can I self-host Ray? Yes — it can be self-hosted. --- OSS alt to proprietary GPU-orchestration platforms; ~43500 stars; complements Celery, SkyPilot; General distributed-compute engine; also serves the cost/GPU/model orchestration branch. No model. --- # RecBole > Updated 2026-09-03 · type: tool · category: product-discovery · status: active · rev 1 94 algorithms; research-oriented - Open source: yes (MIT) - Self-hostable: yes - Pricing model: free - Best for: Researchers and developers reproducing and developing recommendation algorithms in a unified framework. - Last verified: 2026-09-04 - **Canonical:** https://gtmstacker.com/registry/tool/recbole/ - **Source:** [github · github.com/RUCAIBox](https://github.com/RUCAIBox/RecBole) - **Tags:** product-discovery, app-product-discovery - **Repository:** https://github.com/RUCAIBox/RecBole ## Is RecBole open source? Yes — MIT-licensed. ## How much does RecBole cost? It is free to use. ## Can I self-host RecBole? Yes — it can be self-hosted. --- 94 algorithms; research-oriented --- # Recommenders > Updated 2026-09-03 · type: tool · category: product-discovery · status: active · rev 1 LF-governed best-practices toolkit; not turnkey service - Open source: yes (MIT) - Self-hostable: yes - Pricing model: free - Best for: Researchers and developers prototyping and deploying recommendation systems from experimentation to production. - Last verified: 2026-09-04 - **Canonical:** https://gtmstacker.com/registry/tool/recommenders/ - **Source:** [github · github.com/recommenders-team](https://github.com/recommenders-team/recommenders) - **Tags:** product-discovery, app-product-discovery - **Repository:** https://github.com/recommenders-team/recommenders ## Is Recommenders open source? Yes — MIT-licensed. ## How much does Recommenders cost? It is free to use. ## Can I self-host Recommenders? Yes — it can be self-hosted. --- LF-governed best-practices toolkit; not turnkey service --- # RefearnApp > Updated 2026-09-03 · type: tool · category: referral-affiliate · status: active · rev 1 Affiliate tracking + payouts; thin bus-factor - Open source: yes (AGPL-3.0) - Self-hostable: yes - Pricing model: freemium - Best for: Indie hackers, founders, and businesses building and tracking referral and affiliate programs. - Last verified: 2026-09-04 - **Canonical:** https://gtmstacker.com/registry/tool/refearnapp/ - **Source:** [github · github.com/ZAK123DSFDF](https://github.com/ZAK123DSFDF/refearnapp) - **Tags:** referral-affiliate - **Repository:** https://github.com/ZAK123DSFDF/refearnapp ## Is RefearnApp open source? Yes — AGPL-3.0-licensed. ## How much does RefearnApp cost? It has a free tier plus paid plans. ## Can I self-host RefearnApp? Yes — it can be self-hosted. --- Affiliate tracking + payouts; thin bus-factor --- # Refferq > Updated 2026-09-03 · type: tool · category: referral-affiliate · status: active · rev 1 Most permissive; payout automation - Open source: yes (MIT) - Self-hostable: yes - Pricing model: free - Best for: SaaS business owners who need to establish and manage referral and affiliate marketing programs. - Last verified: 2026-09-04 - **Canonical:** https://gtmstacker.com/registry/tool/refferq/ - **Source:** [github · github.com/Refferq](https://github.com/Refferq/Refferq) - **Tags:** referral-affiliate - **Repository:** https://github.com/Refferq/Refferq ## Is Refferq open source? Yes — MIT-licensed. ## How much does Refferq cost? It is free to use. ## Can I self-host Refferq? Yes — it can be self-hosted. --- Most permissive; payout automation --- # RefRef > Updated 2026-09-03 · type: tool · category: referral-affiliate · status: active · rev 1 Purpose-built referral+affiliate w/ fraud monitoring; alpha - Open source: yes (AGPL-3.0) - Self-hostable: yes - Best for: Companies and organizations that want to build referral programs for their products on a self-hosted platform. - Last verified: 2026-09-04 - **Canonical:** https://gtmstacker.com/registry/tool/refref/ - **Source:** [github · github.com/amicalhq](https://github.com/amicalhq/refref) - **Tags:** referral-affiliate - **Repository:** https://github.com/amicalhq/refref ## Is RefRef open source? Yes — AGPL-3.0-licensed. ## How much does RefRef cost? It is open source — self-hosting is free; you pay only for your own infrastructure. ## Can I self-host RefRef? Yes — it can be self-hosted. --- Purpose-built referral+affiliate w/ fraud monitoring; alpha --- # Relaticle > Updated 2026-09-03 · type: tool · category: crm-sales · status: active · rev 1 OSS alt to Attio; ~1494 stars; via openalternative.co - Open source: yes (AGPL-3.0) - Self-hostable: yes - Pricing model: free - Best for: Developer-led teams, AI-forward startups, and SMBs wanting a self-hosted CRM with AI agent integration and no vendor lock-in. - Last verified: 2026-09-04 - **Canonical:** https://gtmstacker.com/registry/tool/relaticle/ - **Source:** [github · github.com/relaticle](https://github.com/relaticle/relaticle) - **Tags:** crm-sales - **Repository:** https://github.com/relaticle/relaticle ## Is Relaticle open source? Yes — AGPL-3.0-licensed. ## How much does Relaticle cost? It is free to use. ## Can I self-host Relaticle? Yes — it can be self-hosted. --- OSS alt to Attio; ~1494 stars; via openalternative.co ---