72 open-source tools with a free self-host or tier plus a paid cloud/enterprise option, curated: Onyx, OpenSEO, Helpin. Every entry lists license, pricing, and links.
Onyx· tool, 2026-10-10 Open-source (MIT) knowledge and context layer that connects to 50+ applications to index and surface organizational knowledge for a team and its AI agents — hybrid search, agentic RAG, and custom agents, self-hostable with the Community Edition.
OpenSEO· tool, 2026-10-09 Self-hostable, open-source alternative to Semrush/Ahrefs (MIT): keyword research, rank tracking, backlinks, and site audits, with a first-class MCP + AI-skills surface. Bring your own DataForSEO key; no forced subscription. Docker/Cloudflare self-host, or a $10/month hosted plan.
Helpin· tool, 2026-10-08 Open-source alternative to Intercom, Fin, and Linear: support, project tracking, CRM, meetings, and docs in one self-hosted workspace, with AI agents that use customer history to answer questions, keep docs in sync, and turn bug reports into pull requests.
Rivet· tool, 2026-10-04 Rivet is an open-source actor runtime for stateful workloads (AI agents, realtime apps, durable execution), used as a self-hostable alternative to Cloudflare Durable Objects: you run the open-source control plane as a Rust binary or container on your own infrastructure. Open source: yes (Apache-2.0); self-hostable. Free OSS core with an optional paid managed cloud. ~6.2k stars; created 2023; active (pushed 2026-10-04). Maker-stated 12 ms p50 cold starts, ~72 KB per actor.
Estela· tool, 2026-09-29 Estela reconstructs billable hours from Claude Code and Codex transcripts plus git history, for developers and agencies who never fill in timesheets. Open source: yes (MIT); self-hostable (free tier runs locally; open-core, Pro/Teams add hosted sync). Freemium; brand-new (0 stars); maker jdleonruiz.
agent-custody· tool, 2026-09-28 agent-custody is a chain-of-custody layer for AI agents: signed receipts for every tool call, a Cedar-policy MCP gateway, a Merkle tamper-evident transparency log, and offline/browser verifiers, with adapters for LangChain, OpenAI Agents SDK, and Claude Agent SDK. Open source: yes (Apache-2.0); self-hostable; freemium. Active (~217 commits, 0.6.x).
Matomo· tool, 2026-09-28 Matomo is open source (GPL-3.0): a free/libre, self-hosted web analytics platform positioned as a privacy-first alternative to Google Analytics: you install it on your own server so visitor data stays in your database. Covers real-time visits, goals and campaign tracking, e-commerce, segments, geo-location, and customizable dashboards. Runs on 1.4M+ sites.
OpenPanel· tool, 2026-09-28 OpenPanel is a self-hosted, open-source (AGPL-3.0) product- and web-analytics platform positioned as an open-source alternative to Mixpanel and Google Analytics: funnels, cohorts, user profiles, session replay, real-time dashboards, A/B testing, and privacy-first cookieless tracking. Self-host OpenPanel for full data ownership, or use the hosted cloud.
Zammad· tool, 2026-09-28 Zammad is a web-based open source helpdesk and customer-support system (AGPL-3.0): manage tickets and conversations across email, chat, telephone and social channels. A self-hosted, OSS open source alternative to Zendesk, stewarded by the independent Zammad Foundation, with an optional commercial cloud.
Postiz· tool, 2026-09-26 Open-source social media management platform (AGPL-3.0) for scheduling, automating, and analyzing content across 14+ channels — X, LinkedIn, Instagram, TikTok, YouTube, Facebook, Threads, Bluesky, Mastodon, Reddit, and more. Includes AI-assisted content and image generation; self-host free with your own API keys or use the hosted cloud. An open alternative to Buffer.
October Bus· tool, 2026-09-26 A local-first coordination layer for AI agents and harnesses (Apache-2.0): agents discover peers, exchange durable messages, delegate work, coordinate shared tasks, and request human input — with delivery guarantees, identity management, and no cloud control plane. Go daemon + SQLite, TypeScript SDK, MCP bindings.
Elmo· tool, 2026-09-25 Elmo is an MIT-licensed, self-hostable platform that tracks how ChatGPT, Claude, Perplexity, Gemini, Copilot, Grok and Google AI Overviews cite or omit your brand — an AEO/GEO citation monitor positioned against Profound, Peec and Otterly. It is established, not a fresh drop: ~13 months old, 362 stars. It is open-core: the self-hostable MIT core is real and active, and a paid Elmo Cloud ($29/mo) and white-label exist alongside it.
HarnessRouter· tool, 2026-09-21 Apache-2.0 abstraction layer, pitched as an OpenRouter for agent harnesses: one API your product calls to run a task, retrieve the result, and switch between coding-agent harnesses (Codex, Claude Code, Hermes and others) without re-implementing each integration. It handles persistent sessions, file handling and streaming behind that single interface. Self-hostable via Docker with your own keys and infrastructure; a managed cloud version exists separately.
ZizkaDB· tool, 2026-09-20 AGPL-3.0 audit-trail database for AI agents (Python) that records every agent decision and session as tamper-evident, checksum-backed logs, tracks the causal lineage between them, and lets you replay a session to see how the agent reached a decision. Each entry carries a checksum that changes if the record is altered, so the trail is verifiable for debugging and compliance. Self-hostable via Docker for free; a managed cloud tier is a separate paid option.
MiniMax Code· tool, 2026-09-19 MIT source preview of MiniMax's terminal coding agent (TypeScript). The published source covers an interactive TUI, a headless CLI for scripts and CI, and an ACP endpoint for compatible editors. It can use a MiniMax account or a bring-your-own provider through OpenAI-compatible or Anthropic-compatible APIs, including local models. Search, plugins, multimodal tools, MCP and permission controls sit in the same workflow. The repository does not include the separate desktop application's source.
OpenMeter· tool, 2026-09-19 Apache-2.0 monetization infrastructure (Go) for AI, API and usage-based products. It ingests CloudEvents, attributes and aggregates usage, enforces entitlements and credit limits, models plans and dynamic prices, and runs the invoice lifecycle while leaving payment and tax processing to external providers. A Docker Compose quickstart runs locally; production uses OpenMeter API and workers with Kafka, ClickHouse and PostgreSQL. The current v1 releases are beta and can break between upgrades.
Monid· tool, 2026-09-17 MIT connector framework (TypeScript on Deno) from monid-ai, pitched as 'OpenRouter for agent tools': one interface an agent uses to reach many external tools (search, scraping, people and company enrichment, market data, media generation) instead of hardcoding each vendor. The repo is the open, self-hostable connector layer and execution engine, run locally with keys you bring. A separate hosted platform (monid.ai) sells 2,000+ connectors across 72+ providers on metered billing.
Contentport· tool, 2026-09-15 Open-source (AGPL-3.0) content platform for technical founders: write tweets and threads with AI assistance and schedule them to Twitter/X. Developed in public — the README doubles as a live roadmap. Repo activity has slowed (last push December 2025). An open alternative to Post Bridge.
Ycode· tool, 2026-09-15 MIT-licensed visual no-code website builder and CMS: create and manage sites without code, self-hosted from the open-source project or on the managed cloud. Self-hosting builds on GitHub, Supabase and Vercel. A young open alternative to Webflow.
HyperFrames· tool, 2026-09-14 Open-source video-as-code framework from HeyGen (Apache-2.0, TypeScript): write HTML, CSS and seekable animations, render a deterministic MP4. No timeline editor. Runs locally via a CLI (Node 22+ and FFmpeg) with an init/lint/preview/render/publish loop, ships 20 agent skills so Claude Code, Cursor or Gemini CLI can drive it, and can generate hundreds of variants from code. Optional HeyGen-hosted cloud and AWS Lambda rendering sit on top of the open core.
OpenShorts· tool, 2026-09-13 Open-source, self-hostable OpusClip alternative (MIT core, Python): turns long videos into vertical 9:16 shorts with AI moment detection, per-scene reframing, face tracking, word-level captions (faster-whisper), and AI voice dubbing. Ships a built-in MCP server (/mcp) and a REST API with completion webhooks so agents can drive it. Self-host free with Docker, or use the managed cloud from $12/mo (the cloud billing dir is source-available under a commercial license, not MIT).
Usertour· tool, 2026-09-13 Open-source in-app product tours, checklists and surveys for product teams — a self-hostable alternative to Userflow and Appcues. Ships an MCP server so AI assistants (Claude Code, Cursor) can generate onboarding flows directly in your project. Dual-licensed: MIT community code plus a separate enterprise license.
OpenObserve· tool, 2026-09-10 Open-source, OpenTelemetry-native observability platform (Rust): unified logs, metrics and traces with a dedicated AI/LLM layer that tracks cost, tokens, latency percentiles and error rates across models, plus agent graphs, session traces and evaluation/quality scoring — the monitoring layer for a self-hosted agent stack, an alternative to hosted APM.
ACI.dev (Aipolabs)· tool, 2026-09-03 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.
Aptabase· tool, 2026-09-03 OSS alt to Google Analytics; ~1774 stars; via openalternative.co
AtroCore· tool, 2026-09-03 Most-maintained GPL; DAM one module
Betterlytics· tool, 2026-09-03 OSS alt to Google Analytics; ~172 stars; via openalternative.co
Browser Harness· tool, 2026-09-03 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· tool, 2026-09-03 Flagship 'make websites accessible for AI agents'; ~108k stars; CDP/Playwright; complements Crawl4AI/Browser Harness/Lightpanda; CAVEAT target-site ToS + agent runtime actions
Chroma· tool, 2026-09-03 OSS alt to Qdrant; ~28984 stars; via ossinsight.io
Crawl4AI· tool, 2026-09-03 OSS alt to Browserbase; ~77347 stars; via openalternative.co
CrewAI· tool, 2026-09-03 Highest cadence; zero advisories
Cube· tool, 2026-09-03 De-facto OSS semantic layer; not end-user UI
Documenso· tool, 2026-09-03 Modern DocuSign alt; no external PRs
Easy!Appointments· tool, 2026-09-03 Longest-lived booking; dated PHP; no routing
Ever Gauzy· tool, 2026-09-03 OSS alt to Attio; ~4305 stars; via openalternative.co
Fider· tool, 2026-09-03 OSS alt to Featurebase; ~4458 stars; via openalternative.co
Ghost· tool, 2026-09-03 GATE PASS (trademark limits branding not site resale)
Grist· tool, 2026-09-03 OSS alt to Airtable; ~11432 stars; via openalternative.co
Skyvern· tool, 2026-09-03 OSS alt to UiPath, Automation Anywhere (AI RPA); ~22700 stars; complements browser-use (XREF), LaVague, Stagehand, Notte; Drives a real browser via LLM+CV; AGPL copyleft (self-host obligations). No reverse-eng of any single platform, so no per-platform ToS flag, but automating logged-in sessions can still trip site anti-bot; use provided credentials/OAuth. Cloud offering is separate.
SwanLab· tool, 2026-09-03 OSS alt to Weights & Biases; ~4128 stars; via ossinsight.io
Swetrix· tool, 2026-09-03 OSS alt to Google Analytics; ~1116 stars; via openalternative.co
Omnara· tool, 2026-09-02 Open-source infrastructure for running production-grade AI agents: you build the agent, Omnara handles hosting, durable state (Postgres), sandboxes, permissions, and secrets, with any model (Anthropic/OpenAI/Bedrock/open endpoints). Cloud or fully self-hosted in your own VPC — an OSS alternative to hosted managed-agent platforms.
Khoj· tool, 2026-08-31 A self-hostable AI 'second brain': chat with local or cloud LLMs over your own PDFs/Markdown/Notion/org-mode with semantic search and cited answers, build custom agents, and use it from the browser, Obsidian, Emacs, desktop, phone, or WhatsApp. Replaces several paid AI-assistant subscriptions.
Hyperswitch· tool, 2026-08-29 Open-source payments orchestration (Rust) that routes transactions across paid PSPs (Stripe, Adyen, …) rather than replacing them — a vendor-neutral monetization layer. Apache-2.0.
Twenty· tool, 2026-08-29 Open-source, self-hostable CRM and system-of-record — an OSS alternative to Salesforce/HubSpot with a REST/GraphQL API to persist records. Core is AGPL-3.0; SDKs MIT; some features gated behind a paid Enterprise license.
Activepieces· tool, 2026-08-25 Open-source workflow automation (Zapier alternative): no-code builder, 280+ integrations, a TypeScript pieces framework, and ~400 MCP servers for LLM integration. Self-hostable.
Firecrawl· tool, 2026-08-25 The context API to search, scrape, and crawl the web at scale and turn sites into clean, LLM-ready data. Core is AGPL-3.0; SDKs/UI are MIT.
Firecrawl MCP Server· tool, 2026-08-25 Official Firecrawl MCP server that brings web search, scraping, crawling, and structured extraction to MCP-compatible agents as clean, agent-ready context.
GrowthBook· tool, 2026-08-25 Open-source feature flags, A/B experimentation, and product analytics across 11 warehouse sources — prove whether an LLM-generated variation actually performs better.
Langfuse· tool, 2026-08-25 LLM engineering platform: observability, evals, prompt management, traces, and datasets — for diagnosing why a marketing/GTM agent made a bad recommendation, not just that it failed.
PostHog· tool, 2026-08-25 Product & web analytics platform: session replay, funnels, feature flags, experiments, error tracking, and AI observability — with agent/MCP support. Shows what visitors did after the click.