Open-source AI notes and knowledge-base tools
Ask questions of your own documents and notes.
Block-based, local-first note-taking app with backlinks, database views and self-hosted sync, plus built-in AI and MCP so agents can read and write notes.
Built by a Chinese team with strong Chinese typesetting and input-method support, fully self-hostable. A Chinese-friendly alternative to Notion and Logseq.
or docker run b3log/siyuanAn open-source NotebookLM: import PDFs, web pages and videos for Q&A and summaries, and generate multi-speaker podcasts.
Self-hostable with any model (including local), so your data doesn't go to Google. Podcast speaker count and voices are customizable.
InstallStart with Docker Compose per the README (image lfnovo/open_notebook)A self-hosted AI second brain that searches and answers questions over your Markdown, PDF, Notion and Obsidian data, with scheduled automations and deep research.
Accessible from Obsidian, Emacs, the browser, mobile and more, with cloud or local models — one service covering many note sources.
Ask questions about, summarize and rewrite your entire vault inside Obsidian; newer versions can also run agents like OpenCode, Codex and Claude Code directly in Obsidian.
The most full-featured Obsidian AI plugin. Works with cloud APIs or local Ollama/LM Studio; core features are free.
InstallObsidian Settings → Community plugins → search “Copilot”Indexes your notes with a local embedding model and surfaces semantically related notes and passages as you write, helping you build links.
Zero setup by default, no API key, vectors computed locally. Good for privacy-minded users who want old notes to resurface.
InstallObsidian Settings → Community plugins → search “Smart Connections”
Updated Oct 25, 2026 · ★ GitHub