head to head · open source
odysseus vs h2o-llmstudio
odysseus has 87,371 GitHub stars, 907 forks, 1,233 open issues and last shipped 2 days ago. h2o-llmstudio has 5,183 stars, 557 forks, 36 open issues and last shipped 2 days ago. odysseus leads on adoption by 1,586% (87,371 vs 5,183 stars). odysseus is written in Python under AGPL-3.0; h2o-llmstudio is written in Python under Apache-2.0. odysseus has attracted 1% as many forks as stars, h2o-llmstudio 11%. 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 | h2o-llmstudio | |
|---|---|---|
| GitHub stars | ★ 87K | ★ 5.2K |
| License | AGPL-3.0 | Apache-2.0 |
| Written in | Python | Python |
| Last push | 2026-09-17 | 2026-09-17 |
| Forks | ⑂ 907 | ⑂ 557 |
| 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 h2o-llmstudio if
- You want the h2o-llmstudio feature set and don't need the biggest community
- You prefer the Apache-2.0 license terms
- Your stack matches Python
- You evaluated both and h2o-llmstudio 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 h2o-llmstudio
H2O LLM Studio is an Apache 2.0 Python framework with a no code graphical interface for fine tuning large language models, built for teams and individuals who want a custom LLM without writing training code yourself.
read the full h2o-llmstudio overview →
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Frequently asked questions
Is odysseus or h2o-llmstudio more popular?
odysseus has 87,371 GitHub stars and h2o-llmstudio has 5,183. odysseus has the larger community by that measure.
Are odysseus and h2o-llmstudio free?
Both are open source. odysseus is licensed under AGPL-3.0 and h2o-llmstudio under Apache-2.0. Neither carries a licence fee.
What is the difference between odysseus and h2o-llmstudio?
odysseus is written in Python and h2o-llmstudio 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, odysseus or h2o-llmstudio?
Choose odysseus if you want the larger community (87,371 stars) or its AGPL-3.0 licence terms. Choose h2o-llmstudio if its feature set, stack or Apache-2.0 licence fits better. Both are self-hostable.