Atomic vs Outline

Comparing two open source alternatives to Notion. Use the comparison below to decide which one fits your needs.

Atomic

MIT

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

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Outline

BSL-1.1

The fastest growing-team knowledge base — beautiful, realtime collaborative, feature packed, and markdown compatible Notion and Confluence alternative.

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Side-by-side comparison

	Atomic	Outline
License	MIT	BSL-1.1
Self-hostable	Yes	Yes
GitHub Stars	2,002	41,162
Forks	143	3,652
Open Issues	36	67
Last Commit	Sep 29, 2026	Nov 3, 2026
First Released	Nov 25, 2025	May 22, 2016
Categories	Note Taking & Knowledge Management Tools	Wiki Software
Tags	#note taking #markdown #knowledge-management #LLM #local ai	#wiki #collaboration #knowledge-base

GitHub stars over time

Atomic2,002

Outline

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