Comparison
ChatTTS vs OpenVoice
Verdict
Pick ChatTTS if chatTTS is a Python-based repository for generating speech tailored to everyday conversations in both Chinese and English; pick OpenVoice if openVoice is an instant voice cloning tool utilizing an audio foundation model for text-to-speech and zero-shot capabilities.
Markdown twin · ChatTTS alternatives · OpenVoice alternatives
GraphCanon updated 1w
vs
Trust & integrity
| Signal | ChatTTS | OpenVoice |
|---|---|---|
| Maintenance | Slowing (127d since push) As of 1w · github_public_v1 | Dormant (465d since push) As of 4w · github_public_v1 |
| Provenance | Not a fork · Organization account As of 1w · github_public_v1 | Not a fork · Organization account As of 4w · github_public_v1 |
| OSV dependency advisories | No lockfile (source not queried) As of 1mo · osv@v1 | Published findings 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
- OpenVoice
- Instant voice cloning using an audio foundation model
Stars
- ChatTTS
- 40k
- OpenVoice
- 37k
Forks
- ChatTTS
- 4.3k
- OpenVoice
- 4.1k
Open issues
- ChatTTS
- 60
- OpenVoice
- 307
Language
- ChatTTS
- Python
- OpenVoice
- Python
Adopt for
- ChatTTS
- ChatTTS is a Python-based repository for generating speech tailored to everyday conversations in both Chinese and English.
- OpenVoice
- OpenVoice is an instant voice cloning tool utilizing an audio foundation model for text-to-speech and zero-shot capabilities.
Persona
- ChatTTS
- -
- OpenVoice
- -
Runtime
- ChatTTS
- -
- OpenVoice
- -
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.
- OpenVoice
- Available under the MIT License, allowing free use for both commercial and research purposes.
Last pushed
- ChatTTS
- Apr 10, 2026
- OpenVoice
- Apr 19, 2025
Categories
- ChatTTS
- AI Agents, Speech & Audio
- OpenVoice
- Speech & Audio
Trust and health
Maintenance
- ChatTTS
- Slowing (36%)
- OpenVoice
- Dormant (18%)
Days since push
- ChatTTS
- 127d
- OpenVoice
- 465d
Open issues (now)
- ChatTTS
- 60
- OpenVoice
- 307
Stars delta
- ChatTTS
- +140 (30d)
- OpenVoice
- Unknown
Open issues delta
- ChatTTS
- -1 (30d)
- OpenVoice
- Unknown
OSV dependency advisories
- ChatTTS
- No lockfile (source not queried)
- OpenVoice
- Published findings
Full report
- ChatTTS
- Trust report
- OpenVoice
- Trust report
Choose ChatTTS if…
- License: ChatTTS is AGPL-3.0, OpenVoice is MIT.
- Requirements: Python-based implementation means that familiarity with Python is necessary for effective use..
- Tags unique to ChatTTS: agent, chatgpt, chattts, chinese 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 OpenVoice if…
- License: OpenVoice is MIT, ChatTTS is AGPL-3.0.
- Pricing: As it is open-source with a permissive MIT license, usage is free. However, users may need to incur costs for compute resources when deploying scalable solutions..
- Tags unique to OpenVoice: text-to-speech, tts, voice-clone, zero-shot-tts.
- When rapid deployment of clone voices is needed without extensive training examples required by other tools due to its zero-shot text-to-speech feature.
When NOT to use OpenVoice
- If your project requires fine-tuning of voice characteristics beyond what the tool's audio foundation model offers, as other tools may be more customizable.
- When dealing with niche linguistic requirements or extremely rare language models that might not be well-supported by OpenVoice’s broader focus.
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 (myshell-ai/OpenVoice) · observed Jul 29, 2026
- GitHub forks (myshell-ai/OpenVoice) · observed Jul 29, 2026
- Last push (myshell-ai/OpenVoice) · observed Apr 19, 2025
- License file (MIT) · observed Jul 29, 2026
- Decision facts (enrichment) · observed Jul 17, 2026
- Trust scan (lockfile / OSV) · observed Jul 11, 2026
GitHub stars on cards: ChatTTS 40k · OpenVoice 37k (synced Aug 16, 2026).
Common questions
- What is the difference between ChatTTS and OpenVoice?
- ChatTTS: A generative speech model for daily dialogue. OpenVoice: Instant voice cloning using an audio foundation model. See the comparison table for live GitHub stats and shared categories.
- When should I choose ChatTTS over OpenVoice?
- Choose ChatTTS over OpenVoice when License: ChatTTS is AGPL-3.0, OpenVoice is MIT; Requirements: Python-based implementation means that familiarity with Python is necessary for effective use.; Tags unique to ChatTTS: agent, chatgpt, chattts, chinese 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 OpenVoice over ChatTTS?
- Choose OpenVoice over ChatTTS when License: OpenVoice is MIT, ChatTTS is AGPL-3.0; Pricing: As it is open-source with a permissive MIT license, usage is free. However, users may need to incur costs for compute resources when deploying scalable solutions.; Tags unique to OpenVoice: text-to-speech, tts, voice-clone, zero-shot-tts; When rapid deployment of clone voices is needed without extensive training examples required by other tools due to its zero-shot text-to-speech feature.
- 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 OpenVoice?
- If your project requires fine-tuning of voice characteristics beyond what the tool's audio foundation model offers, as other tools may be more customizable. When dealing with niche linguistic requirements or extremely rare language models that might not be well-supported by OpenVoice’s broader focus.
- Is ChatTTS or OpenVoice more popular on GitHub?
- ChatTTS has more GitHub stars (39,768 vs 37,044). Stars measure visibility, not whether either tool fits your constraints.
- Are ChatTTS and OpenVoice open source?
- Yes - both are open-source projects on GitHub (ChatTTS: AGPL-3.0, OpenVoice: MIT).
- Where can I find alternatives to ChatTTS or OpenVoice?
- GraphCanon lists graph-backed alternatives at ChatTTS alternatives and OpenVoice alternatives (ChatTTS markdown twin, OpenVoice 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 OpenVoice?
- ChatTTS: Slowing. OpenVoice: Dormant. 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 OpenVoice?
- GraphCanon publishes per-repo trust reports with dated maintenance, provenance, and scan summaries: ChatTTS trust report; OpenVoice trust report.