AppFlowy vs Atomic

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

AppFlowy

AGPL-3.0

Open source Notion alternative that brings projects, wikis, and teams together with AI while keeping you in control of your data.

Visit Full details

Atomic

MIT

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

Visit Full details

Side-by-side comparison

	AppFlowy	Atomic
License	AGPL-3.0	MIT
Self-hostable	Yes	Yes
GitHub Stars	78,176	2,002
Forks	6,175	143
Open Issues	1,026	36
Last Commit	Nov 2, 2026	Sep 29, 2026
First Released	Jun 16, 2021	Nov 25, 2025
Categories	PDF viewer	Note Taking & Knowledge Management Tools
Tags	—	#note taking #markdown #knowledge-management #LLM #local ai

GitHub stars over time

AppFlowy78,176

Atomic

Similar open source alternatives

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.

Alternative to:

Obsidian

Jotty

Self-hosted notes and checklists with markdown files, Kanban task projects, SSO, PGP encryption, and a REST API.

Alternative to:

Notion

Outline

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

Alternative to:

Notion

memos

Privacy-first, self-hosted note-taking platform with markdown support, tagging, and built-in AI — a lightweight alternative to Notion and Obsidian.

Alternative to:

Obsidian

AFFiNE

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

Alternative to:

Notion

SilverBullet

Self-hosted, programmable knowledge base: plain Markdown notes with live queries, backlinks, and an embedded Lua scripting runtime.

Alternative to:

Notion