OpenKnowledge – open source AI-first alternative to Obsidian/Notion
Hi HN, Nick here. We’re launching OpenKnowledge (https://openknowledge.ai/), a “what you see is what you get” markdown editor that has direct integrations with Claude, Codex, and other agents. Available as MacOS app or Web UI+CLI. Fully free/local and OSS. We built this because we wanted a Notion-like experience for writing and sharing markdown files across our team. Obsidian is the best alternative we tried, but found it doesn’t have a true WYSWIG UI and it didn’t integrate well with Claude/Codex outside of community plugins. So we built OpenKnowledge. It takes…
OpenKnowledge – open source AI-first alternative to Obsidian/Notion launched on June 25, 2026 with 381 votes, #49 of 22,647 launches that month and more than 99% of that year's launches.
In plain words
OpenKnowledge is a free, open-source markdown editor available as a macOS app or web UI with CLI. It features a true WYSIWYG interface and direct integrations with AI agents like Claude and Codex, allowing users to edit documents side-by-side with AI tools. Built for teams wanting to write and share markdown files with a Notion-like experience, it includes a file navigator, link explorer, and built-in RAG capabilities for LLM workflows.
written from the facts on this page · September 2026
From the sources
Beautiful, AI-native markdown IDE and LLM wiki. Contribute to inkeep/open-knowledge development by creating an account on GitHub.
OpenKnowledge is a beautiful markdown editor with integrations with Claude, Codex, and other harnesses. For knowledge bases, LLM wikis, specs, and notes. Private, local, and free. Desktop app — download it from openknowledge.ai/download (or grab an installer from the latest release ): Web app — on any platform (including Intel Macs and servers), run the same editor as a local web app via the CLI ( Node.js 24+ and git required): npm install -g @inkeep/open-knowledge cd your-project ok init # scaffold the project + wire up your AI editors (Claude Code, Claude Desktop, Cursor, Codex, OpenCode, OpenClaw) ok start --open # serve the web editor and open it in your browser Usage Use OpenKnowledge…from github.com
In the maker’s words, at launch
Hi HN, Nick here. We’re launching OpenKnowledge (https://openknowledge.ai/), a “what you see is what you get” markdown editor that has direct integrations with Claude, Codex, and other agents. Available as MacOS app or Web UI+CLI. Fully free/local and OSS. We built this because we wanted a…
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