Comparison
ChatTTS vs CosyVoice
Verdict
Pick ChatTTS if chatTTS is a Python-based repository for generating speech tailored to everyday conversations in both Chinese and English; pick CosyVoice if cosyVoice is a Python-based multi-lingual large voice generation model. It supports extensive capabilities including fine-tuning, TTS (Text-To-Speech), and natural language generation.
Markdown twin · ChatTTS alternatives · CosyVoice alternatives
GraphCanon updated 4d
vs
Trust & integrity
| Signal | ChatTTS | CosyVoice |
|---|---|---|
| Maintenance | Slowing (127d since push) As of 4d · github_public_v1 | Steady (59d since push) As of 3w · github_public_v1 |
| Provenance | Not a fork · Organization account As of 4d · github_public_v1 | Not a fork · Organization account As of 3w · github_public_v1 |
| OSV dependency advisories | No lockfile (source not queried) As of 1mo · osv@v1 | No lockfile (source not queried) As of 1mo · osv@v1 |
| deps.dev advisories | Not queried deps.dev@v1 | Not queried deps.dev@v1 |
| OpenSSF Scorecard | Not queried openssf-scorecard@v1 | Not queried openssf-scorecard@v1 |
Tagline
- ChatTTS
- A generative speech model for daily dialogue
- CosyVoice
- Multi-lingual large voice generation model with full-stack abilities for inference, training and deployment.
Stars
- ChatTTS
- 40k
- CosyVoice
- 22k
Forks
- ChatTTS
- 4.3k
- CosyVoice
- 2.6k
Open issues
- ChatTTS
- 60
- CosyVoice
- 756
Language
- ChatTTS
- Python
- CosyVoice
- Python
Adopt for
- ChatTTS
- ChatTTS is a Python-based repository for generating speech tailored to everyday conversations in both Chinese and English.
- CosyVoice
- CosyVoice is a Python-based multi-lingual large voice generation model. It supports extensive capabilities including fine-tuning, TTS (Text-To-Speech), and natural language generation.
Persona
- ChatTTS
- -
- CosyVoice
- -
Runtime
- ChatTTS
- -
- CosyVoice
- -
License
- ChatTTS
- Licensed under AGPL-3.0, which allows for free use, distribution, and modification as long as these rights are maintained in derivative works.
- CosyVoice
- Apache-2.0
Last pushed
- ChatTTS
- Apr 10, 2026
- CosyVoice
- May 25, 2026
Categories
- ChatTTS
- AI Agents, Speech & Audio
- CosyVoice
- Inference & Serving, Model Training, Speech & Audio
Trust and health
Maintenance
- ChatTTS
- Slowing (36%)
- CosyVoice
- Steady (60%)
Days since push
- ChatTTS
- 127d
- CosyVoice
- 59d
Open issues (now)
- ChatTTS
- 60
- CosyVoice
- 756
Stars delta
- ChatTTS
- +140 (30d)
- CosyVoice
- Unknown
Open issues delta
- ChatTTS
- -1 (30d)
- CosyVoice
- Unknown
Full report
- ChatTTS
- Trust report
- CosyVoice
- Trust report
Shared compatibility
- Python · ChatTTS: Python runtime · CosyVoice: Python runtime
Choose ChatTTS if…
- License: ChatTTS is AGPL-3.0, CosyVoice is Apache-2.0.
- Requirements: Python-based implementation means that familiarity with Python is necessary for effective use..
- Tags unique to ChatTTS: agent, chattts, chinese language, english-language.
- Also covers AI Agents.
- Use ChatTTS when you require text-to-speech functionality for daily dialogue applications, especially those involving Chinese or English languages.
When NOT to use ChatTTS
- Avoid using ChatTTS in environments where the speech generation model is expected to handle complex technical jargon or specialized vocabulary, as it's optimized for daily conversation.
- Do not use ChatTTS if your project requires the integration of more than two languages simultaneously due to its current support for only Chinese and English.
Choose CosyVoice if…
- License: CosyVoice is Apache-2.0, ChatTTS is AGPL-3.0.
- Tags unique to CosyVoice: audio-generation, cantonese, chatbot, chinese.
- Also covers Inference & Serving, Model Training.
- When you need support for multiple languages like Cantonese, Chinese, English, Japanese, and Korean.
When NOT to use CosyVoice
- If your project specifically requires fine-tuned performance in languages not supported by CosyVoice such as Arabic or Spanish.
- When strict real-time speech synthesis requirements are essential, as CosyVoice may face delays depending on the environment's computational power and model complexity.
Explore
Sources
Every stat on this page traces to a dated GitHub sync, license file, enrichment field, or trust scan.
- GitHub stars (2noise/ChatTTS) · observed Aug 16, 2026
- GitHub forks (2noise/ChatTTS) · observed Aug 16, 2026
- Last push (2noise/ChatTTS) · observed Apr 10, 2026
- License file (AGPL-3.0) · observed Aug 16, 2026
- Decision facts (enrichment) · observed Jul 11, 2026
- Trust scan (lockfile / OSV) · observed Jul 11, 2026
- GitHub stars (FunAudioLLM/CosyVoice) · observed Jul 24, 2026
- GitHub forks (FunAudioLLM/CosyVoice) · observed Jul 24, 2026
- Last push (FunAudioLLM/CosyVoice) · observed May 25, 2026
- License file (Apache-2.0) · observed Jul 24, 2026
- Decision facts (enrichment) · observed Jul 11, 2026
- Trust scan (lockfile / OSV) · observed Jul 11, 2026
GitHub stars on cards: ChatTTS 40k · CosyVoice 22k (synced Aug 16, 2026).
Common questions
- What is the difference between ChatTTS and CosyVoice?
- ChatTTS: A generative speech model for daily dialogue. CosyVoice: Multi-lingual large voice generation model with full-stack abilities for inference, training and deployment.. See the comparison table for live GitHub stats and shared categories.
- When should I choose ChatTTS over CosyVoice?
- Choose ChatTTS over CosyVoice when License: ChatTTS is AGPL-3.0, CosyVoice is Apache-2.0; Requirements: Python-based implementation means that familiarity with Python is necessary for effective use.; Tags unique to ChatTTS: agent, chattts, chinese language, english-language; Also covers AI Agents; Use ChatTTS when you require text-to-speech functionality for daily dialogue applications, especially those involving Chinese or English languages.
- When should I choose CosyVoice over ChatTTS?
- Choose CosyVoice over ChatTTS when License: CosyVoice is Apache-2.0, ChatTTS is AGPL-3.0; Tags unique to CosyVoice: audio-generation, cantonese, chatbot, chinese; Also covers Inference & Serving, Model Training; When you need support for multiple languages like Cantonese, Chinese, English, Japanese, and Korean.
- When should I avoid ChatTTS?
- Avoid using ChatTTS in environments where the speech generation model is expected to handle complex technical jargon or specialized vocabulary, as it's optimized for daily conversation. Do not use ChatTTS if your project requires the integration of more than two languages simultaneously due to its current support for only Chinese and English.
- When should I avoid CosyVoice?
- If your project specifically requires fine-tuned performance in languages not supported by CosyVoice such as Arabic or Spanish. When strict real-time speech synthesis requirements are essential, as CosyVoice may face delays depending on the environment's computational power and model complexity.
- Is ChatTTS or CosyVoice more popular on GitHub?
- ChatTTS has more GitHub stars (39,768 vs 22,373). Stars measure visibility, not whether either tool fits your constraints.
- Are ChatTTS and CosyVoice open source?
- Yes - both are open-source projects on GitHub (ChatTTS: AGPL-3.0, CosyVoice: Apache-2.0).
- Where can I find alternatives to ChatTTS or CosyVoice?
- GraphCanon lists graph-backed alternatives at ChatTTS alternatives and CosyVoice alternatives (ChatTTS markdown twin, CosyVoice markdown twin), ranked by typed relationship edges rather than popularity votes.
- Is there a machine-readable version of this comparison?
- Yes. The markdown twin at this comparison mirrors this page for agents and LLM crawlers, with the same stats table and FAQ answers.
- Which is better maintained, ChatTTS or CosyVoice?
- ChatTTS: Slowing. CosyVoice: Steady. Compare maintenance labels, days since push, and release cadence in the trust section below - stars alone do not measure maintenance.
- Where are the full trust reports for ChatTTS and CosyVoice?
- GraphCanon publishes per-repo trust reports with dated maintenance, provenance, and scan summaries: ChatTTS trust report; CosyVoice trust report.