head to head · open source
odysseus vs chatgpt-android
odysseus has 87,371 GitHub stars, 907 forks, 1,233 open issues and last shipped 2 days ago. chatgpt-android has 3,870 stars, 447 forks, 27 open issues and last shipped 9 months ago. odysseus leads on adoption by 2,158% (87,371 vs 3,870 stars). odysseus is written in Python under AGPL-3.0; chatgpt-android is written in Kotlin under Apache-2.0. odysseus has attracted 1% as many forks as stars, chatgpt-android 12%. 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 | chatgpt-android | |
|---|---|---|
| GitHub stars | ★ 87K | ★ 3.9K |
| License | AGPL-3.0 | Apache-2.0 |
| Written in | Python | Kotlin |
| Last push | 2026-09-17 | 2026-01-03 |
| Forks | ⑂ 907 | ⑂ 447 |
| 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 chatgpt-android if
- You want the chatgpt-android feature set and don't need the biggest community
- You prefer the Apache-2.0 license terms
- Your stack matches Kotlin
- You evaluated both and chatgpt-android 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 chatgpt-android
ChatGPT Android is an open source Kotlin sample application that demonstrates OpenAI's ChatGPT chat API on Android inside a chatbot interface built with Jetpack Compose and the Stream Chat SDK for Compose, aimed at Android developers who want a working reference rather than a blank project.
read the full chatgpt-android overview →
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Frequently asked questions
Is odysseus or chatgpt-android more popular?
odysseus has 87,371 GitHub stars and chatgpt-android has 3,870. odysseus has the larger community by that measure.
Are odysseus and chatgpt-android free?
Both are open source. odysseus is licensed under AGPL-3.0 and chatgpt-android under Apache-2.0. Neither carries a licence fee.
What is the difference between odysseus and chatgpt-android?
odysseus is written in Python and chatgpt-android in Kotlin. 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 chatgpt-android?
Choose odysseus if you want the larger community (87,371 stars) or its AGPL-3.0 licence terms. Choose chatgpt-android if its feature set, stack or Apache-2.0 licence fits better. Both are self-hostable.