Comparison
ChatTTS vs merlin
Verdict
Pick ChatTTS if chatTTS is a Python-based generative speech model for daily dialogue, supporting both Chinese and English languages. It offers a web interface and command-line inference capabilities; pick merlin if merlin is an open-source Python toolkit for building Deep Neural Network models for statistical parametric speech synthesis that requires pairing with a text processor and vocoder.
Markdown twin · ChatTTS alternatives · merlin alternatives
GraphCanon updated Sep 30, 2026
9views this month
Trust & integrity
| Signal | ChatTTS | merlin |
|---|---|---|
| Maintenance | Slowing (160d since push) As of Sep 18, 2026 · github_public_v1 | Dormant (2391d since push) As of Sep 20, 2026 · github_public_v1 |
| Provenance | Not a fork · Organization account As of Sep 18, 2026 · github_public_v1 | Not a fork · Organization account As of Sep 20, 2026 · github_public_v1 |
| OSV dependency advisories | Published findings As of Sep 18, 2026 · osv@v1 | Published findings As of Jul 11, 2026 · 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.
- merlin
- Neural Network based Speech Synthesis System
Stars
- ChatTTS
- 40k
- merlin
- 1.3k
Forks
- ChatTTS
- 4.3k
- merlin
- 431
Open issues
- ChatTTS
- 60
- merlin
- 207
Language
- ChatTTS
- Python
- merlin
- Python
Adopt for
- ChatTTS
- ChatTTS is a Python-based generative speech model for daily dialogue, supporting both Chinese and English languages. It offers a web interface and command-line inference capabilities.
- merlin
- Merlin is an open-source Python toolkit for building Deep Neural Network models for statistical parametric speech synthesis that requires pairing with a text processor and vocoder.
Persona
- ChatTTS
- -
- merlin
- -
Runtime
- ChatTTS
- -
- merlin
- -
License
- ChatTTS
- AGPL-3.0
- merlin
- Apache-2.0
Last pushed
- ChatTTS
- Apr 10, 2026
- merlin
- Mar 3, 2020
Categories
- ChatTTS
- LLM Frameworks, Speech & Audio
- merlin
- Speech & Audio
Trust and health
Maintenance
- ChatTTS
- Slowing (36%)
- merlin
- Dormant (18%)
Days since push
- ChatTTS
- 160d
- merlin
- 2391d
Open issues (now)
- ChatTTS
- 60
- merlin
- 207
Stars delta
- ChatTTS
- +82 (30d)
- merlin
- +1 (30d)
Full report
- ChatTTS
- Trust report
- merlin
- Trust report
Shared compatibility
- Python · ChatTTS: Python runtime · merlin: Python runtime
Choose ChatTTS if…
- License: ChatTTS is AGPL-3.0, merlin is Apache-2.0.
- Requirements: Optional installations like vLLM and TransformerEngine are available but come with specific warnings and limitations..
- Tags unique to ChatTTS: agent, chat, chatgpt, chattts.
- Also covers LLM Frameworks.
- When you need a tool that supports both Chinese and English for daily dialogue generation.
When NOT to use ChatTTS
- If you are working on a project that requires the use of TransformerEngine with NVIDIA GPU, as it is currently under development and cannot run properly.
- When you need fast text-to-speech generation, as the optional installation of FlashAttention-2 can slow down the generating speed.
- If you are not comfortable with a slow installation process, as noted in the repository documentation.
Choose merlin if…
- License: merlin is Apache-2.0, ChatTTS is AGPL-3.0.
- Tags unique to merlin: deep-learning, keras, speech-synthesis, tensorflow.
- Merlin is an open-source Python toolkit for building Deep Neural Network models for statistical parametric speech synthesis that requires pairing with a text processor and vocoder.
When NOT to use merlin
- Last GitHub push was Mar 3, 2020 (dormant maintenance). Validate activity before betting a new project on merlin.
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 Sep 20, 2026
- GitHub forks (2noise/ChatTTS) · observed Sep 20, 2026
- Last push (2noise/ChatTTS) · observed Apr 10, 2026
- License file (AGPL-3.0) · observed Sep 20, 2026
- Decision facts (enrichment) · observed Sep 18, 2026
- Trust scan (lockfile / OSV) · observed Sep 18, 2026
- GitHub stars (CSTR-Edinburgh/merlin) · observed Sep 20, 2026
- GitHub forks (CSTR-Edinburgh/merlin) · observed Sep 20, 2026
- Last push (CSTR-Edinburgh/merlin) · observed Mar 3, 2020
- License file (Apache-2.0) · observed Sep 20, 2026
- Decision facts (enrichment) · observed Jul 12, 2026
- Trust scan (lockfile / OSV) · observed Jul 11, 2026
GitHub stars on cards: ChatTTS 40k · merlin 1.3k (synced Sep 20, 2026).
Common questions
- What is the difference between ChatTTS and merlin?
- ChatTTS: A generative speech model for daily dialogue.. merlin: Neural Network based Speech Synthesis System. See the comparison table for live GitHub stats and shared categories.
- When should I choose ChatTTS over merlin?
- Choose ChatTTS over merlin when License: ChatTTS is AGPL-3.0, merlin is Apache-2.0; Requirements: Optional installations like vLLM and TransformerEngine are available but come with specific warnings and limitations.; Tags unique to ChatTTS: agent, chat, chatgpt, chattts; Also covers LLM Frameworks; When you need a tool that supports both Chinese and English for daily dialogue generation.
- When should I choose merlin over ChatTTS?
- Choose merlin over ChatTTS when License: merlin is Apache-2.0, ChatTTS is AGPL-3.0; Tags unique to merlin: deep-learning, keras, speech-synthesis, tensorflow; Merlin is an open-source Python toolkit for building Deep Neural Network models for statistical parametric speech synthesis that requires pairing with a text processor and vocoder.
- When should I avoid ChatTTS?
- If you are working on a project that requires the use of TransformerEngine with NVIDIA GPU, as it is currently under development and cannot run properly. When you need fast text-to-speech generation, as the optional installation of FlashAttention-2 can slow down the generating speed. If you are not comfortable with a slow installation process, as noted in the repository documentation.
- When should I avoid merlin?
- Last GitHub push was Mar 3, 2020 (dormant maintenance). Validate activity before betting a new project on merlin.
- Is ChatTTS or merlin more popular on GitHub?
- ChatTTS has more GitHub stars (39,850 vs 1,321). Stars measure visibility, not whether either tool fits your constraints.
- Are ChatTTS and merlin open source?
- Yes - both are open-source projects on GitHub (ChatTTS: AGPL-3.0, merlin: Apache-2.0).
- Where can I find alternatives to ChatTTS or merlin?
- GraphCanon lists graph-backed alternatives at ChatTTS alternatives and merlin alternatives (ChatTTS markdown twin, merlin 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 merlin?
- ChatTTS: Slowing. merlin: 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 merlin?
- GraphCanon publishes per-repo trust reports with dated maintenance, provenance, and scan summaries: ChatTTS trust report; merlin trust report.