head to head · open source
odysseus vs chatgpt-android
odysseus has 94,935 GitHub stars, 1,862 forks, 1,233 open issues and last shipped yesterday. chatgpt-android has 3,874 stars, 449 forks, 27 open issues and last shipped 10 months ago. odysseus leads on adoption by 2,351% (94,935 vs 3,874 stars). odysseus is written in Python under AGPL-3.0; chatgpt-android is written in Kotlin under Apache-2.0. odysseus has attracted 2% 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 | ★ 95K | ★ 3.9K |
| License | AGPL-3.0 | Apache-2.0 |
| Written in | Python | Kotlin |
| Last push | 2026-11-02 | 2026-01-03 |
| Forks | ⑂ 1.9K | ⑂ 449 |
| Self-hosting | Yes | Yes |
| Data ownership | Your server | Your server |
pick odysseus if
- You weight community size — 95K 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
A self hosted AI workspace for chat, agents, research, documents, email, notes, calendar, and local model workflows. Quick Start · Setup Guide · Contributing · Roadmap Quick Start dev is the default branch and gets the newest changes first. Use main if you want the more curated branch. Open when the containers are healthy. The first admin password is printed in docker compose logs odysseus . Native installs, GPU notes, Windows/macOS instructions, HTTPS, and configuration live in the setup guide. Features Chat + Agents — local/API models, tools, MCP, files, shell, skills, and memory. Cookbook — hardware aware…
read the full odysseus overview →
About chatgpt-android
ChatGPT Android demonstrates OpenAI's ChatGPT on Android with Stream Chat SDK for Compose. The primary objective of this repository is to showcase the following: Demonstrating OpenAI's chat APIs. Creating comprehensive UI elements utilizing Jetpack Compose. Incorporating Android architecture components using Jetpack libraries such as Hilt and AppStartup. Executing background tasks efficiently through Kotlin Coroutines and WorkManager. Seamlessly integrating chat systems via the Stream Chat SDK for Compose to facilitate real time event handling. 📷 Previews 🛥 Stream Chat & Video SDKs ChatGPT Android is built…
read the full chatgpt-android overview →
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Frequently asked questions
Is odysseus or chatgpt-android more popular?
odysseus has 94,935 GitHub stars and chatgpt-android has 3,874. 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 (94,935 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.