head to head · open source
odysseus vs CosyVoice
odysseus has 87,371 GitHub stars, 907 forks, 1,233 open issues and last shipped 2 days ago. CosyVoice has 23,682 stars, 2,690 forks, 698 open issues and last shipped 4 months ago. odysseus leads on adoption by 269% (87,371 vs 23,682 stars). odysseus is written in Python under AGPL-3.0; CosyVoice is written in Python under Apache-2.0. odysseus has attracted 1% as many forks as stars, CosyVoice 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 | CosyVoice | |
|---|---|---|
| GitHub stars | ★ 87K | ★ 24K |
| License | AGPL-3.0 | Apache-2.0 |
| Written in | Python | Python |
| Last push | 2026-09-17 | 2026-05-25 |
| Forks | ⑂ 907 | ⑂ 2.7K |
| 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 CosyVoice if
- You want the CosyVoice 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 CosyVoice 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 CosyVoice
CosyVoice is an Apache 2.0 Python text to speech system built on large language models that ships inference, training and deployment for multi lingual voice generation, aimed at teams who need self hosted zero shot voice cloning and streaming speech synthesis rather than a hosted API.
read the full CosyVoice overview →
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Frequently asked questions
Is odysseus or CosyVoice more popular?
odysseus has 87,371 GitHub stars and CosyVoice has 23,682. odysseus has the larger community by that measure.
Are odysseus and CosyVoice free?
Both are open source. odysseus is licensed under AGPL-3.0 and CosyVoice under Apache-2.0. Neither carries a licence fee.
What is the difference between odysseus and CosyVoice?
odysseus is written in Python and CosyVoice 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 CosyVoice?
Choose odysseus if you want the larger community (87,371 stars) or its AGPL-3.0 licence terms. Choose CosyVoice if its feature set, stack or Apache-2.0 licence fits better. Both are self-hostable.