head to head · open source
odysseus vs AionUi
odysseus has 87,371 GitHub stars, 907 forks, 1,233 open issues and last shipped 2 days ago. AionUi has 32,942 stars, 3,404 forks, 905 open issues and last shipped 10 days ago. odysseus leads on adoption by 165% (87,371 vs 32,942 stars). odysseus is written in Python under AGPL-3.0; AionUi is written in TypeScript under Apache-2.0. odysseus has attracted 1% as many forks as stars, AionUi 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 | AionUi | |
|---|---|---|
| GitHub stars | ★ 87K | ★ 33K |
| License | AGPL-3.0 | Apache-2.0 |
| Written in | Python | TypeScript |
| Last push | 2026-09-17 | 2026-09-09 |
| Forks | ⑂ 907 | ⑂ 3.4K |
| 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 AionUi if
- You want the AionUi feature set and don't need the biggest community
- You prefer the Apache-2.0 license terms
- Your stack matches TypeScript
- You evaluated both and AionUi 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 AionUi
AionUi is an open source, cross platform Cowork application that puts AI agents to work alongside the user on their own computer. It is written in TypeScript and released under the Apache 2.0 license, and it lives in the AI agent and chat tooling ecosystem alongside the command line agents it is built to host. Rather than acting as a plain chat client, it runs a built in agent engine that can read and write files, search the web, generate images, and call Model Context Protocol tools, while showing the user every action the agent takes and keeping approval in the user's hands.
read the full AionUi overview →
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Frequently asked questions
Is odysseus or AionUi more popular?
odysseus has 87,371 GitHub stars and AionUi has 32,942. odysseus has the larger community by that measure.
Are odysseus and AionUi free?
Both are open source. odysseus is licensed under AGPL-3.0 and AionUi under Apache-2.0. Neither carries a licence fee.
What is the difference between odysseus and AionUi?
odysseus is written in Python and AionUi 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 AionUi?
Choose odysseus if you want the larger community (87,371 stars) or its AGPL-3.0 licence terms. Choose AionUi if its feature set, stack or Apache-2.0 licence fits better. Both are self-hostable.