head to head · open source
Open WebUI vs odysseus
Open WebUI has 152,426 GitHub stars, 22,301 forks, 294 open issues and last shipped yesterday. odysseus has 87,357 stars, 903 forks, 1,233 open issues and last shipped 2 days ago. Open WebUI leads on adoption by 74% (152,426 vs 87,357 stars). Open WebUI is written in Python under a custom or non-standard licence; odysseus is written in Python under AGPL-3.0. Open WebUI has attracted 15% as many forks as stars, odysseus 1%. Open WebUI 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
| Open WebUI | odysseus | |
|---|---|---|
| GitHub stars | ★ 152K | ★ 87K |
| License | Custom / other | AGPL-3.0 |
| Written in | Python | Python |
| Last push | 2026-09-18 | 2026-09-17 |
| Forks | ⑂ 22K | ⑂ 903 |
| Self-hosting | Yes | Yes |
| Data ownership | Your server | Your server |
pick Open WebUI if
- You weight community size — 152K stars and counting
- You want the Custom / other license terms
- Your stack matches Python
- You value the larger contributor base for long-term maintenance
pick odysseus if
- You want the odysseus feature set and don't need the biggest community
- You prefer the AGPL-3.0 license terms
- Your stack matches Python
- You evaluated both and odysseus fits your workflow better
About Open WebUI
Open WebUI is a self hosted, open source AI interface that unifies access to local and cloud based large language models. It runs entirely in a web browser and supports Ollama for local model hosting alongside any OpenAI compatible API, including services like LMStudio, GroqCloud, Mistral, and OpenRouter. Built in Python, it functions as a drop in replacement for proprietary AI platforms, giving users full control over their model infrastructure and data.
read the full Open WebUI overview →
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 →
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Frequently asked questions
Is Open WebUI or odysseus more popular?
Open WebUI has 152,426 GitHub stars and odysseus has 87,357. Open WebUI has the larger community by that measure.
Are Open WebUI and odysseus free?
Both are open source. Open WebUI has no licence declared in this registry, and odysseus is licensed under AGPL-3.0. Both are free to self-host.
What is the difference between Open WebUI and odysseus?
Open WebUI is written in Python and odysseus in Python. The practical differences are community size, licence terms, language stack and release cadence — all compared in the table above.
Which should I choose, Open WebUI or odysseus?
Choose Open WebUI if you want the larger community (152,426 stars) or its Custom / other licence terms. Choose odysseus if its feature set, stack or AGPL-3.0 licence fits better. Both are self-hostable.