Comparison
CosyVoice vs pyttsx3
Verdict
Pick CosyVoice when license: CosyVoice is Apache-2.0, pyttsx3 is MPL-2.0; pick pyttsx3 when license: pyttsx3 is MPL-2.0, CosyVoice is Apache-2.0.
Markdown twin · CosyVoice alternatives · pyttsx3 alternatives
GraphCanon updated today
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Trust & integrity
| Signal | CosyVoice | pyttsx3 |
|---|---|---|
| Maintenance | Steady (46d since push) As of today · github_public_v1 | Very active (1d since push) As of today · github_public_v1 |
| Provenance | Not a fork · Organization account As of today · github_public_v1 | Not a fork · Personal account As of today · github_public_v1 |
| Security (OSV) | No lockfile As of today · none | No lockfile As of today · none |
Tagline
- CosyVoice
- Multi-lingual large voice generation model with full-stack abilities for inference, training and deployment.
- pyttsx3
- Offline Text To Speech synthesis for python
Stars
- CosyVoice
- 22k
- pyttsx3
- 2.5k
Forks
- CosyVoice
- 2.5k
- pyttsx3
- 357
Open issues
- CosyVoice
- 767
- pyttsx3
- 87
Language
- CosyVoice
- Python
- pyttsx3
- Python
Adopt for
- 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.
- pyttsx3
- -
Persona
- CosyVoice
- -
- pyttsx3
- -
Runtime
- CosyVoice
- -
- pyttsx3
- -
License
- CosyVoice
- Apache-2.0
- pyttsx3
- MPL-2.0
Last pushed
- CosyVoice
- May 25, 2026
- pyttsx3
- Jul 9, 2026
Categories
- CosyVoice
- Model Training, Speech & Audio, Inference & Serving
- pyttsx3
- Speech & Audio
Trust and health
Maintenance
- CosyVoice
- Steady (60%)
- pyttsx3
- Very active (96%)
Days since push
- CosyVoice
- 46d
- pyttsx3
- 1d
Open issues (now)
- CosyVoice
- 767
- pyttsx3
- 87
Owner type
- CosyVoice
- Organization
- pyttsx3
- User
Full report
- CosyVoice
- Trust report
- pyttsx3
- Trust report
Choose CosyVoice if…
- License: CosyVoice is Apache-2.0, pyttsx3 is MPL-2.0.
- Tags unique to CosyVoice: cantonese, audio-generation, chinese, english.
- Also covers Model Training, Inference & Serving.
- 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 (FunAudioLLM/CosyVoice) · observed Jul 11, 2026
- GitHub forks (FunAudioLLM/CosyVoice) · observed Jul 11, 2026
- Last push (FunAudioLLM/CosyVoice) · observed May 25, 2026
- License file (Apache-2.0) · observed Jul 11, 2026
- Decision facts (enrichment) · observed Jul 11, 2026
- Trust scan (lockfile / OSV) · observed Jul 11, 2026
- GitHub stars (nateshmbhat/pyttsx3) · observed Jul 11, 2026
- GitHub forks (nateshmbhat/pyttsx3) · observed Jul 11, 2026
- Last push (nateshmbhat/pyttsx3) · observed Jul 9, 2026
- License file (MPL-2.0) · observed Jul 11, 2026
- Trust scan (lockfile / OSV) · observed Jul 11, 2026
GitHub stars on cards: CosyVoice 22k · pyttsx3 2.5k (synced Jul 11, 2026).
Common questions
- What is the difference between CosyVoice and pyttsx3?
- CosyVoice: Multi-lingual large voice generation model with full-stack abilities for inference, training and deployment.. pyttsx3: Offline Text To Speech synthesis for python. See the comparison table for live GitHub stats and shared categories.
- When should I choose CosyVoice over pyttsx3?
- Choose CosyVoice over pyttsx3 when License: CosyVoice is Apache-2.0, pyttsx3 is MPL-2.0; Tags unique to CosyVoice: cantonese, audio-generation, chinese, english; Also covers Model Training, Inference & Serving; When you need support for multiple languages like Cantonese, Chinese, English, Japanese, and Korean.
- When should I choose pyttsx3 over CosyVoice?
- Choose pyttsx3 over CosyVoice when License: pyttsx3 is MPL-2.0, CosyVoice is Apache-2.0; Tags unique to pyttsx3: pyttsx, python3, text-to-speech, python; More recently updated (last pushed Jul 9, 2026).
- 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 CosyVoice or pyttsx3 more popular on GitHub?
- CosyVoice has more GitHub stars (22,089 vs 2,520). Stars measure visibility, not whether either tool fits your constraints.
- Are CosyVoice and pyttsx3 open source?
- Yes - both are open-source projects on GitHub (CosyVoice: Apache-2.0, pyttsx3: MPL-2.0).
- Where can I find alternatives to CosyVoice or pyttsx3?
- GraphCanon lists graph-backed alternatives at CosyVoice alternatives and pyttsx3 alternatives (CosyVoice markdown twin, pyttsx3 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, CosyVoice or pyttsx3?
- CosyVoice: Steady. pyttsx3: Very active. 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 CosyVoice and pyttsx3?
- GraphCanon publishes per-repo trust reports with dated maintenance, provenance, and scan summaries: CosyVoice trust report; pyttsx3 trust report.