head to head · open source
odysseus vs Leon
odysseus has 87,371 GitHub stars, 907 forks, 1,233 open issues and last shipped 2 days ago. Leon has 17,520 stars, 1,469 forks, 112 open issues and last shipped 2 days ago. odysseus leads on adoption by 399% (87,371 vs 17,520 stars). odysseus is written in Python under AGPL-3.0; Leon is written in TypeScript under MIT. odysseus has attracted 1% as many forks as stars, Leon 8%. odysseus 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.
← all 15422 open source comparisons
Side by side
| odysseus | Leon | |
|---|---|---|
| GitHub stars | ★ 87K | ★ 18K |
| License | AGPL-3.0 | MIT |
| Written in | Python | TypeScript |
| Last push | 2026-09-17 | 2026-09-17 |
| Forks | ⑂ 907 | ⑂ 1.5K |
| Self-hosting | Yes | Yes |
| Data ownership | Your server | Your server |
pick odysseus if
- You weight community size — 87K 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
Odysseus is a self hosted AI workspace written in Python and released under the AGPL 3.0 or later licence, built for people who want chat, agents, research, documents, email, notes, tasks, and calendar in one deployment on infrastructure they control.
read the full odysseus overview →
About Leon
Leon is open source personal AI assistant. It lives in Node.js and TypeScript ecosystem, under AI Interaction & Interfaces category. Project builds around tools, context, memory, and agentic execution. It aims to stay practical, privacy aware, and grounded in real environment. Leon can operate locally, use dedicated tools instead of relying on free form guessing, and complete tasks from start to finish across deterministic workflows and agent style execution.
More in AI & Machine Learning
Related comparisons
More AI Interaction & Interfaces projects
Compare either of these against the rest of the AI Interaction & Interfaces field.
Frequently asked questions
Is odysseus or Leon more popular?
odysseus has 87,371 GitHub stars and Leon has 17,520. 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 (87,371 stars) or its AGPL-3.0 licence terms. Choose Leon if its feature set, stack or MIT licence fits better. Both are self-hostable.