head to head · open source
odysseus vs ChatUI
odysseus has 87,371 GitHub stars, 907 forks, 1,233 open issues and last shipped 2 days ago. ChatUI has 4,448 stars, 426 forks, 53 open issues and last shipped 6 months ago. odysseus leads on adoption by 1,864% (87,371 vs 4,448 stars). odysseus is written in Python under AGPL-3.0; ChatUI is written in TypeScript under MIT. odysseus has attracted 1% as many forks as stars, ChatUI 10%. 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.
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Side by side
| odysseus | ChatUI | |
|---|---|---|
| GitHub stars | ★ 87K | ★ 4.4K |
| License | AGPL-3.0 | MIT |
| Written in | Python | TypeScript |
| Last push | 2026-09-17 | 2026-03-30 |
| Forks | ⑂ 907 | ⑂ 426 |
| 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 ChatUI if
- You want the ChatUI feature set and don't need the biggest community
- You prefer the MIT license terms
- Your stack matches TypeScript
- You evaluated both and ChatUI 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 ChatUI
ChatUI is an MIT licensed UI design language and React component library for conversational interfaces, published on npm as @chatui/core and aimed at front end teams that need a ready chat surface instead of hand built message components.
read the full ChatUI overview →
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Frequently asked questions
Is odysseus or ChatUI more popular?
odysseus has 87,371 GitHub stars and ChatUI has 4,448. odysseus has the larger community by that measure.
Are odysseus and ChatUI free?
Both are open source. odysseus is licensed under AGPL-3.0 and ChatUI under MIT. Neither carries a licence fee.
What is the difference between odysseus and ChatUI?
odysseus is written in Python and ChatUI 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 ChatUI?
Choose odysseus if you want the larger community (87,371 stars) or its AGPL-3.0 licence terms. Choose ChatUI if its feature set, stack or MIT licence fits better. Both are self-hostable.