Open Source Note Taking Apps

The privacy-first, open-source note-taking app with end-to-end encrypted sync, AI assistance, and a powerful plugin ecosystem across every platform.

A privacy-first, open-source knowledge graph platform combining Markdown, Org-mode, bidirectional linking, and local-first storage for building your second brain.

Open-source, self-hosted note-taking built for quick capture — Markdown-native, lightweight, and fully yours.

End-to-end encrypted, open-source note-taking where your data stays yours — even from the server.

Write, draw, and plan in one infinite canvas — the open-source alternative to Notion and Miro that keeps your data yours.

A local-first, end-to-end encrypted knowledge OS that lets you build notes, tasks, wikis, and entire apps — with your data stored offline and synced peer-to-peer.

A privacy-first, self-hosted AI research notebook with 18+ model providers, multi-speaker podcast generation, and full REST API—your open-source alternative to Google Notebook LM.

Self-hosted collaborative wiki and knowledge base with real-time editing, diagrams, AI assistance, and enterprise access controls — a modern alternative to Confluence and Notion.

Self-hosted read-it-later platform with highlights, newsletters, PDFs, and seamless Obsidian and Logseq integration.

End-to-end encrypted notes and files — private by design, built to last, and fully self-hostable.

The state-of-the-art memory and context engine for AI agents — ranked #1 on all three major AI memory benchmarks.

A local-first monorepo led by Whispering, an open-source speech-to-text app, built on an MIT toolkit that turns your data into plain Markdown and SQLite files you own instead of a database you rent.

Capture anything first, then let AI transform your scattered records into polished, structured Markdown notes with RAG-powered knowledge retrieval.

The open-source, offline-first Notion, Obsidian & Confluence alternative with multi-tenant teams, OIDC/SSO, and one-command Docker deployment.

Anarlog is an open-source, local-first AI meeting notetaker that records, transcribes, and summarizes meetings entirely on your device — no cloud lock-in, no mandatory account, and every note saved as a plain markdown file you own forever.