Open-source Content Copywriting tools

The best open-source Content Copywriting tools, curated: 17 in the registry, including Doory, ArtCraft (Crafting Apps), FeedHive AI Slop Detector. Every tool is open-source; each entry lists license, self-hostability, and links.

17 tools · ← all categories · JSON

• Doory · tool, 2026-10-17
  AAL-licensed, browser-based design editor that is a free, self-hostable alternative to Canva: make posters, social posts, stories, slides, invitations, resumes, thumbnails and business cards, then export to PNG, JPG, SVG, PDF, MP4 or GIF, with no account required to start.
• ArtCraft (Crafting Apps) · tool, 2026-10-14
  Apache-2.0 suite of local-first Rust creative and office apps (PhotoCraft, VectorCraft, FilmCraft, PdfCraft, WordCraft and more) that replace Adobe and Microsoft 365 subscriptions, each driveable headless by CLI, JSON control stream, or MCP server for agents.
• FeedHive AI Slop Detector · tool, 2026-10-13
  MIT-licensed, self-hostable pattern library of 120 AI-writing 'slop' tells across 9 categories, shipped as patterns.json plus an agent skill for Claude Code and Codex so an AI drafts past its own giveaways before publishing.
• ALwrity · tool, 2026-10-13
  ALwrity is an MIT-licensed, self-hostable AI digital-marketing platform that generates multimodal content — blogs, LinkedIn posts, videos, podcasts — with brand consistency across channels, and integrates Google Search Console for SEO-aware writing. Python backend, React/TypeScript frontend.
• OpenCut · tool, 2026-10-11
  Free, MIT-licensed, privacy-first video editor positioned as a CapCut alternative — multi-track timeline, GPU compositor, masks, and auto-captions, with no watermark or subscription gate on exports.
• PhotoCraft · tool, 2026-10-06
  PhotoCraft is an open-source, clean-room reimplementation of Adobe Photoshop in pure Rust, built to be driven by agents: every tool runs a command from one registry of 500+ commands, and the GUI, a headless CLI (photocraft-cli), a JSON control channel, and an MCP server all call the same commands, so anything you can click a script or an agent can do too. Dual MIT/Apache-2.0; self-hostable. Free. Published 2026-09-30; ~14.5k stars but brand new and unproven in production.
• 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.
• Vibe · tool, 2026-09-15
  Open-source, fully-offline transcription desktop app (MIT, Rust) built on OpenAI's Whisper models: transcribe audio and video locally in 90+ languages, detect speakers, translate, and capture your microphone or system audio, with no account and no data leaving the machine. Exports SRT, VTT, TXT, DOCX, PDF and JSON for subtitle and content workflows. Runs on macOS, Windows and Linux, GPU-accelerated when available.
• 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.
• 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.
• Voicebox · tool, 2026-09-14
  Open-source, fully-local AI voice studio (MIT, Python + React) from Jamie Pine: clone a voice from a short sample, generate speech across 7 TTS engines and 23 languages, and dictate into any text field with a global hotkey (a Wispr Flow alternative). The GTM hook is one MCP tool call, voicebox.speak, that lets any MCP-aware agent talk back in a voice you cloned. Models, voice data and captures never leave the machine; runs on Apple Silicon (MLX) or CUDA/ROCm/CPU (PyTorch), macOS and Windows.
• 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).
• VoiceStudio · tool, 2026-09-12
  Open-source, fully-local voice AI suite (AGPL-3.0, 23.8k★): voice cloning from one reference clip, video dubbing across 646 languages, audiobooks, dictation and transcription, wrapping 14 TTS engines. No account, API key or usage meter for the local workflow — the ElevenLabs alternative that keeps audio on your machine.
• Substack MCP · tool, 2026-09-08
  Open-source MCP server (TypeScript) for Substack: search your archive, create and review drafts, publish Notes, read analytics and manage subscribers across publications — exposing content operations to an AI agent as tools plus a CLI (the maker cites 24 tools).
• Mixpost · tool, 2026-09-03
  OSS alt to Buffer; ~3496 stars; via openalternative.co
• social-post · tool, 2026-09-03
  Multi-platform; hard dep on MuAPI vendor
• WritingTools · tool, 2026-09-03
  Local rewrite/tone; no detector-evasion framing