head to head · open source
AstrBot vs CosyVoice
AstrBot has 40,628 GitHub stars, 2,925 forks, 1,516 open issues and last shipped yesterday. CosyVoice has 23,661 stars, 2,690 forks, 698 open issues and last shipped 4 months ago. AstrBot leads on adoption by 72% (40,628 vs 23,661 stars). AstrBot is written in Python under AGPL-3.0; CosyVoice is written in Python under Apache-2.0. AstrBot has attracted 7% as many forks as stars, CosyVoice 11%. AstrBot was the more recently maintained of the two, and both are self-hostable with no licence fee. The two share 2 topic tags (chatbot, chatgpt), so they are genuine substitutes rather than adjacent tools.
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
| AstrBot | CosyVoice | |
|---|---|---|
| GitHub stars | ★ 41K | ★ 24K |
| License | AGPL-3.0 | Apache-2.0 |
| Written in | Python | Python |
| Last push | 2026-09-17 | 2026-05-25 |
| Forks | ⑂ 2.9K | ⑂ 2.7K |
| Self-hosting | Yes | Yes |
| Data ownership | Your server | Your server |
pick AstrBot if
- You weight community size — 41K 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 AstrBot
AstrBot is an open source all in one Agent chatbot platform written in Python and licensed under AGPL 3.0. It integrates with mainstream instant messaging applications and provides conversational AI infrastructure for individuals, developers, and teams. The project lives in the AI and machine learning ecosystem, specifically the AI interaction and interfaces category, and it has been developed over roughly four years. Its repository carries 40,504 stars and 2,915 forks, and its documented homepage is astrbot.app. Topics attached to the project include agent, ai, chatbot, chatgpt, discord, docker, gemini, gpt, lla…
read the full AstrBot 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 AstrBot or CosyVoice more popular?
AstrBot has 40,628 GitHub stars and CosyVoice has 23,661. AstrBot has the larger community by that measure.
Are AstrBot and CosyVoice free?
Both are open source. AstrBot is licensed under AGPL-3.0 and CosyVoice under Apache-2.0. Neither carries a licence fee.
What is the difference between AstrBot and CosyVoice?
AstrBot 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, AstrBot or CosyVoice?
Choose AstrBot if you want the larger community (40,628 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.