Atomic vs Outline
Comparing two open source alternatives to Notion . Use the comparison below to decide which one fits your needs.
Atomic
MITA self-hosted personal knowledge base that turns markdown notes into an AI-augmented knowledge graph with semantic search and wiki synthesis.
Outline
The fastest growing-team knowledge base — beautiful, realtime collaborative, feature packed, and markdown compatible Notion and Confluence alternative.
Side-by-side comparison
| Atomic | Outline | |
|---|---|---|
| License | MIT | — |
| Self-hostable | Yes | Yes |
| GitHub Stars | 1,558 | 39,036 |
| Forks | 105 | 3,365 |
| Open Issues | 32 | 47 |
| Last Commit | Jun 21, 2026 | Jun 23, 2026 |
| First Released | Nov 25, 2025 | May 22, 2016 |
| Categories | ||
| Tags | — |
Similar open source alternatives
AppFlowy
Open source Notion alternative that brings projects, wikis, and teams together with AI while keeping you in control of your data.
Notion
HelixNotes
A fast, privacy-first local markdown note-taking app built with Tauri and SvelteKit. Your notes stay as plain .md files on your device.
Obsidian
Jotty
Lightweight self-hosted app for managing personal file-based notes and checklists.
Notion
memos
A modern, open-source, self-hosted knowledge management and note-taking platform designed for privacy-conscious users and organizations.
Obsidian
AFFiNE
Open-source knowledge base combining note-taking, whiteboard, and project planning in one workspace.
Notion
SilverBullet
Markdown-based note-taking app with powerful live queries, templates, and a pluggable scripting system for power users.
Notion