Best Free & Open Source Alternatives to Notion

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.

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

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

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

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

Open-source, self-hosted project management tool — a free alternative to Trello, Notion, and Asana.

Straightforward realtime kanban boards for intuitive task tracking with dark mode and collaborative features.

Open-source local-first Markdown workspace for macOS with wiki, AI editing, and encrypted sync.

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

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

A simple local-first note-taking app for your plain .md files with Telegram bot access.

Wiki.js | A modern and powerful wiki app built on Node.js