head to head · open source
odysseus vs Leon
odysseus has 94,896 GitHub stars, 1,847 forks, 1,233 open issues and last shipped yesterday. Leon has 17,627 stars, 1,477 forks, 112 open issues and last shipped yesterday. odysseus leads on adoption by 438% (94,896 vs 17,627 stars). odysseus is written in Python under AGPL-3.0; Leon is written in TypeScript under MIT. odysseus has attracted 2% as many forks as stars, Leon 8%. Leon was the more recently maintained of the two, and both are self-hostable with no licence fee.
Two open source projects, one decision. Both are free and self-hostable — the differences are community size, license terms, language stack and release pace.
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Side by side
| odysseus | Leon | |
|---|---|---|
| GitHub stars | ★ 95K | ★ 18K |
| License | AGPL-3.0 | MIT |
| Written in | Python | TypeScript |
| Last push | 2026-11-02 | 2026-11-02 |
| Forks | ⑂ 1.8K | ⑂ 1.5K |
| Self-hosting | Yes | Yes |
| Data ownership | Your server | Your server |
pick odysseus if
- You weight community size — 95K stars and counting
- You want the AGPL-3.0 license terms
- Your stack matches Python
- You value the larger contributor base for long-term maintenance
pick Leon if
- You want the Leon feature set and don't need the biggest community
- You prefer the MIT license terms
- Your stack matches TypeScript
- You evaluated both and Leon fits your workflow better
About odysseus
A self hosted AI workspace for chat, agents, research, documents, email, notes, calendar, and local model workflows. Quick Start · Setup Guide · Contributing · Roadmap Quick Start dev is the default branch and gets the newest changes first. Use main if you want the more curated branch. Open when the containers are healthy. The first admin password is printed in docker compose logs odysseus . Native installs, GPU notes, Windows/macOS instructions, HTTPS, and configuration live in the setup guide. Features Chat + Agents — local/API models, tools, MCP, files, shell, skills, and memory. Cookbook — hardware aware…
read the full odysseus overview →
About Leon
Leon Your open source personal AI assistant. I share Leon progress most regularly on X / @grenlouis Follow progress on X / @grenlouis · Website · Newsletter · Roadmap · Story ⚠️ Important Notice (as of 2026 03 29) [!IMPORTANT] Leon is currently focused on the 2.0 Developer Preview on the develop branch. The new documentation is not ready yet . The current docs site and older guides mostly reflect the legacy architecture. If you want the legacy, more stable pre agentic version of Leon, use the master branch. If you want to explore or contribute to Leon's new core, develop is the right place. The most accurate…
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Frequently asked questions
Is odysseus or Leon more popular?
odysseus has 94,896 GitHub stars and Leon has 17,627. odysseus has the larger community by that measure.
Are odysseus and Leon free?
Both are open source. odysseus is licensed under AGPL-3.0 and Leon under MIT. Neither carries a licence fee.
What is the difference between odysseus and Leon?
odysseus is written in Python and Leon in TypeScript. The practical differences are community size, licence terms, language stack and release cadence — all compared in the table above.
Which should I choose, odysseus or Leon?
Choose odysseus if you want the larger community (94,896 stars) or its AGPL-3.0 licence terms. Choose Leon if its feature set, stack or MIT licence fits better. Both are self-hostable.