Best Open Source Note Taking & Knowledge Management Tools in 2026

Open-source knowledge base combining note-taking, whiteboard, and project planning in one workspace.

A modern, open-source, self-hosted knowledge management and note-taking platform designed for privacy-conscious users and organizations.

Privacy-focused, open-source note-taking and to-do app with end-to-end encryption and multi-device sync.

Hierarchical personal knowledge base with powerful note-taking, rich text editing, and scripting capabilities.

Real-time collaborative markdown note editor you can self-host — write together with rich formatting and seamless sharing.

Markdown-based note-taking app with powerful live queries, templates, and a pluggable scripting system for power users.

Self-hosted AI transcription and intelligent note-taking platform that turns audio recordings into organized, searchable notes with speaker identification.

A self-hosted knowledge base for note-taking with markdown support, Zettelkasten methodology, and Docker deployment.

Lightweight self-hosted app for managing personal file-based notes and checklists.

A self-hosted personal knowledge base that turns markdown notes into an AI-augmented knowledge graph with semantic search and wiki synthesis.

A simple self-hosted journal and blog API written in Go, using SQLite for storage.