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

Mnemo
Apache-2.0Mnemo is a free, open-source desktop study app combining block-based notes, FSRS flashcards, and mind maps with no accounts or tracking.

Puppyone
Apache-2.0Open source local-first editor for Markdown, docs, rich files, and AI agents — with built-in terminal and Git review.
Side-by-side comparison
Mnemo | Puppyone | |
|---|---|---|
| License | Apache-2.0 | Apache-2.0 |
| Self-hostable | No | Yes |
| GitHub Stars | 95 | 1,198 |
| Forks | 9 | 120 |
| Open Issues | 7 | 5 |
| Last Commit | Oct 9, 2026 | Sep 29, 2026 |
| First Released | Jul 30, 2025 | Jun 29, 2026 |
| 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.

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

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

memos
Privacy-first, self-hosted note-taking platform with markdown support, tagging, and built-in AI — a lightweight alternative to Notion and Obsidian.
ObsidianAFFiNE
Open-source knowledge base combining note-taking, whiteboard, and project planning in one workspace.