OpenKnowledge is an AI-native markdown editor and LLM wiki from Inkeep, designed for knowledge bases, specifications and notes. Released as an open-source project, it has earned more than 4,600 stars on GitHub and was actively updated in 2026.
OpenKnowledge combines a beautiful true WYSIWYG markdown editor, so writing feels like editing a document in Google Docs or Notion, with deep integrations for AI agents. It runs as a desktop app on macOS, Windows and Linux, and also offers a web UI and CLI, with a file navigator, search, tabs and a graph viewer for wiki links. AI editing sits side by side with your document and connects to harnesses such as Claude, Codex, OpenCode and Pi, or any agent through MCP and CLI. Out-of-the-box MCP support, skills and agentic search make it a strong home for LLM wikis and second brains, while team sharing and automatic sync are powered by plain git underneath, keeping files private, local and portable.
OpenKnowledge is free and open source under the GPL-3.0 license. The project describes the app as private, local and free; downloads for all desktop platforms are available from the official website.
OpenKnowledge is for writers, engineers and teams maintaining knowledge bases, specs and notes who want AI assistance built into the editor rather than bolted on. It is especially appealing to the LLM wiki and second-brain communities that keep their knowledge in plain markdown files under their own control.