head to head · open source
quivr vs CosyVoice
quivr has 39,624 GitHub stars, 3,731 forks, 9 open issues and last shipped yesterday. CosyVoice has 24,247 stars, 2,769 forks, 698 open issues and last shipped 5 months ago. quivr leads on adoption by 63% (39,624 vs 24,247 stars). quivr is written in Go under MIT; CosyVoice is written in Python under Apache-2.0. quivr has attracted 9% as many forks as stars, CosyVoice 11%. quivr 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
| quivr | CosyVoice | |
|---|---|---|
| GitHub stars | ★ 40K | ★ 24K |
| License | MIT | Apache-2.0 |
| Written in | Go | Python |
| Last push | 2026-11-02 | 2026-05-25 |
| Forks | ⑂ 3.7K | ⑂ 2.8K |
| Self-hosting | Yes | Yes |
| Data ownership | Your server | Your server |
pick quivr if
- You weight community size — 40K stars and counting
- You want the MIT license terms
- Your stack matches Go
- 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 quivr
Quivr V2 An open source engine that turns continuous content streams into search and monitoring. Quivr V2 ingests content durably, makes it searchable within seconds, enriches it in the background and lets you follow a topic over time. The core stays generic: formats, AI models and business rules belong in plugins, so you can adapt Quivr to your domain without forking the platform. Status: evaluation stage. The API is v0 and may change without notice. Do not run it in production yet. Why Quivr V2 Durable before fast. A write is acknowledged only once it is committed; outages delay processing, they never lose or…
read the full quivr overview →
About CosyVoice
👉🏻 CosyVoice 👈🏻 Fun CosyVoice 3.0 : Demos; Paper; Modelscope; Huggingface; CV3 Eval CosyVoice 2.0 : Demos; Paper; Modelscope; HuggingFace CosyVoice 1.0 : Demos; Paper; Modelscope; HuggingFace Highlight🔥 Fun CosyVoice 3.0 is an advanced text to speech (TTS) system based on large language models (LLM), surpassing its predecessor (CosyVoice 2.0) in content consistency, speaker similarity, and prosody naturalness. It is designed for zero shot multilingual speech synthesis in the wild. Key Features Language Coverage : Covers 9 common languages (Chinese, English, Japanese, Korean, German, Spanish, French…
read the full CosyVoice overview →
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Frequently asked questions
Is quivr or CosyVoice more popular?
quivr has 39,624 GitHub stars and CosyVoice has 24,247. quivr has the larger community by that measure.
Are quivr and CosyVoice free?
Both are open source. quivr is licensed under MIT and CosyVoice under Apache-2.0. Neither carries a licence fee.
What is the difference between quivr and CosyVoice?
quivr is written in Go 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, quivr or CosyVoice?
Choose quivr if you want the larger community (39,624 stars) or its MIT licence terms. Choose CosyVoice if its feature set, stack or Apache-2.0 licence fits better. Both are self-hostable.