Comparison
ChatTTS vs OuteTTS
Verdict
Pick ChatTTS if chatTTS is a Python-based repository for generating speech tailored to everyday conversations in both Chinese and English; pick OuteTTS if outeTTS is a text-to-speech tool for Python that interfaces with its model library and integrates llama.cpp.
Markdown twin · ChatTTS alternatives · OuteTTS alternatives
GraphCanon updated 1w
Trust & integrity
| Signal | ChatTTS | OuteTTS |
|---|---|---|
| Maintenance | Slowing (127d since push) As of 1w · github_public_v1 | Slowing (128d since push) As of 3w · github_public_v1 |
| Provenance | Not a fork · Organization account As of 1w · github_public_v1 | Not a fork · Personal account As of 3w · 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
- OuteTTS
- Interface for OuteTTS models using Python
Stars
- ChatTTS
- 40k
- OuteTTS
- 1.4k
Forks
- ChatTTS
- 4.3k
- OuteTTS
- 119
Open issues
- ChatTTS
- 60
- OuteTTS
- 41
Language
- ChatTTS
- Python
- OuteTTS
- Python
Adopt for
- ChatTTS
- ChatTTS is a Python-based repository for generating speech tailored to everyday conversations in both Chinese and English.
- OuteTTS
- OuteTTS is a text-to-speech tool for Python that interfaces with its model library and integrates llama.cpp.
Persona
- ChatTTS
- -
- OuteTTS
- -
Runtime
- ChatTTS
- -
- OuteTTS
- -
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.
- OuteTTS
- Apache-2.0
Last pushed
- ChatTTS
- Apr 10, 2026
- OuteTTS
- Mar 23, 2026
Categories
- ChatTTS
- AI Agents, Speech & Audio
- OuteTTS
- Speech & Audio
Trust and health
Days since push
- ChatTTS
- 127d
- OuteTTS
- 128d
Open issues (now)
- ChatTTS
- 60
- OuteTTS
- 41
Stars delta
- ChatTTS
- +140 (30d)
- OuteTTS
- Unknown
Open issues delta
- ChatTTS
- -1 (30d)
- OuteTTS
- Unknown
Owner type
- ChatTTS
- Organization
- OuteTTS
- User
OSV dependency advisories
- ChatTTS
- No lockfile (source not queried)
- OuteTTS
- Published findings
Full report
- ChatTTS
- Trust report
- OuteTTS
- Trust report
Shared compatibility
- Python · ChatTTS: Python runtime · OuteTTS: Python runtime
Choose ChatTTS if…
- License: ChatTTS is AGPL-3.0, OuteTTS is Apache-2.0.
- 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 OuteTTS if…
- License: OuteTTS is Apache-2.0, ChatTTS is AGPL-3.0.
- Tags unique to OuteTTS: gguf, llama, text-to-speech, transformers.
- Use when you need access to OuteTTS-specific models.
When NOT to use OuteTTS
- Avoid if your hardware does not support the required dependencies for llama.cpp.
- Not suitable if you require a tool that does not install llama.cpp by default.
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 (edwko/OuteTTS) · observed Jul 30, 2026
- GitHub forks (edwko/OuteTTS) · observed Jul 30, 2026
- Last push (edwko/OuteTTS) · observed Mar 23, 2026
- License file (Apache-2.0) · observed Jul 30, 2026
- Decision facts (enrichment) · observed Jul 17, 2026
- Trust scan (lockfile / OSV) · observed Jul 11, 2026
GitHub stars on cards: ChatTTS 40k · OuteTTS 1.4k (synced Aug 16, 2026).
Common questions
- What is the difference between ChatTTS and OuteTTS?
- ChatTTS: A generative speech model for daily dialogue. OuteTTS: Interface for OuteTTS models using Python. See the comparison table for live GitHub stats and shared categories.
- When should I choose ChatTTS over OuteTTS?
- Choose ChatTTS over OuteTTS when License: ChatTTS is AGPL-3.0, OuteTTS is Apache-2.0; 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 OuteTTS over ChatTTS?
- Choose OuteTTS over ChatTTS when License: OuteTTS is Apache-2.0, ChatTTS is AGPL-3.0; Tags unique to OuteTTS: gguf, llama, text-to-speech, transformers; Use when you need access to OuteTTS-specific models.
- 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 OuteTTS?
- Avoid if your hardware does not support the required dependencies for llama.cpp. Not suitable if you require a tool that does not install llama.cpp by default.
- Is ChatTTS or OuteTTS more popular on GitHub?
- ChatTTS has more GitHub stars (39,768 vs 1,436). Stars measure visibility, not whether either tool fits your constraints.
- Are ChatTTS and OuteTTS open source?
- Yes - both are open-source projects on GitHub (ChatTTS: AGPL-3.0, OuteTTS: Apache-2.0).
- Where can I find alternatives to ChatTTS or OuteTTS?
- GraphCanon lists graph-backed alternatives at ChatTTS alternatives and OuteTTS alternatives (ChatTTS markdown twin, OuteTTS 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 OuteTTS?
- ChatTTS: Slowing. OuteTTS: Slowing. 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 OuteTTS?
- GraphCanon publishes per-repo trust reports with dated maintenance, provenance, and scan summaries: ChatTTS trust report; OuteTTS trust report.