HelixNotes vs Mnemo

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

HelixNotes

AGPL-3.0

A fast, privacy-first local markdown note-taking app built with Tauri and SvelteKit. Your notes stay as plain .md files on your device.

Visit Full details

Mnemo

Apache-2.0

Mnemo is a free, open-source desktop study app combining block-based notes, FSRS flashcards, and mind maps with no accounts or tracking.

Visit Full details

Side-by-side comparison

	HelixNotes	Mnemo
License	AGPL-3.0	Apache-2.0
Self-hostable	No	No
GitHub Stars	155	95
Forks	15	9
Open Issues	57	7
Last Commit	Jul 23, 2026	Oct 9, 2026
First Released	Feb 9, 2026	Jul 30, 2025
Categories	Note Taking & Knowledge Management Tools	Study & Flashcard Tools Note Taking & Knowledge Management Tools Mind Mapping
Tags	#markdown #notes #knowledge-management #productivity #privacy	#flashcards #spaced-repetition #notes #knowledge-management #local-first

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

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

SilverBullet

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

Alternative to:

Notion