Best Open Source Alternatives to Notion

6 open-source tools that can replace Notion. Compare tech stacks, licenses and stars below.

MCPAGPL-3.0

Privacy-first, self-hosted knowledge workspace with block-level editing, AI agents, and MCP support.

46k·Self-Hosted AI·Open source

Alternative to

NOASSERTION

Open-source AI spreadsheet platform with PostgreSQL, AI chat, app builder, and self-hosting.

22k·Self-Hosted AI·Open source

Alternative to

MCPGPL-3.0

Local-first Markdown app that captures scattered info and organizes it into clear notes with AI.

13k·Developer Tools·Open source

Alternative to

MCPNOASSERTION

Open-source agentic workspace with 100+ integrations, MCP support, and local-first data control.

11k·AI Agents·Open source

Alternative to

MCPApache-2.0

Free open-source AI Office suite for Docs, Sheets, Slides and PDF with a built-in AI agent and CLI.

8.6k·AI Agents·Open source

Alternative to

MIT

AI-powered personal knowledge base that auto-builds an interlinked wiki from your documents.

3.5k·AI Agents·Open source

Alternative to