Many Notes vs OpenKnowledge

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

Many Notes

MIT

A Markdown note-taking web application designed for simplicity with vaults, collaboration, and PWA support.

Visit Full details

OpenKnowledge

GPL-3.0

AI-native, local-first markdown editor and LLM wiki with built-in integrations for Claude, Codex, and other agents.

Visit Full details

Side-by-side comparison

	Many Notes	OpenKnowledge
License	MIT	GPL-3.0
Self-hostable	Yes	Yes
GitHub Stars	1,087	4,309
Forks	44	285
Open Issues	9	48
Last Commit	Sep 1, 2026	Sep 24, 2026
First Released	Jul 9, 2024	Jun 3, 2026
Categories	Note Taking & Knowledge Management Tools	Note Taking & Knowledge Management Tools
Tags	#markdown #notes #pwa #self hosted	#markdown #notes #ai #second-brain #agents

GitHub stars over time

Many Notes1,087

OpenKnowledge

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.

Alternative to:

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.

Alternative to:

Obsidian

Jotty

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

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