head to head · open source
odysseus vs aichat
odysseus has 87,371 GitHub stars, 907 forks, 1,233 open issues and last shipped 2 days ago. aichat has 10,453 stars, 743 forks, 104 open issues and last shipped 7 months ago. odysseus leads on adoption by 736% (87,371 vs 10,453 stars). odysseus is written in Python under AGPL-3.0; aichat is written in Rust under Apache-2.0. odysseus has attracted 1% as many forks as stars, aichat 7%. 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 | aichat | |
|---|---|---|
| GitHub stars | ★ 87K | ★ 10K |
| License | AGPL-3.0 | Apache-2.0 |
| Written in | Python | Rust |
| Last push | 2026-09-17 | 2026-02-23 |
| Forks | ⑂ 907 | ⑂ 743 |
| 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 aichat if
- You want the aichat feature set and don't need the biggest community
- You prefer the Apache-2.0 license terms
- Your stack matches Rust
- You evaluated both and aichat 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 aichat
AIChat is an all in one LLM command line tool, written in Rust and licensed under Apache 2.0, that gives developers a shell assistant, an interactive chat REPL, retrieval augmented generation, and AI tools and agents through a single terminal interface to more than twenty language model providers.
read the full aichat overview →
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Frequently asked questions
Is odysseus or aichat more popular?
odysseus has 87,371 GitHub stars and aichat has 10,453. odysseus has the larger community by that measure.
Are odysseus and aichat free?
Both are open source. odysseus is licensed under AGPL-3.0 and aichat under Apache-2.0. Neither carries a licence fee.
What is the difference between odysseus and aichat?
odysseus is written in Python and aichat in Rust. 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 aichat?
Choose odysseus if you want the larger community (87,371 stars) or its AGPL-3.0 licence terms. Choose aichat if its feature set, stack or Apache-2.0 licence fits better. Both are self-hostable.