GraphCanon
Home/Compare/espeak-ng vs CosyVoice

Comparison

espeak-ng vs CosyVoice

Verdict

Pick espeak-ng when espeak-ng is primarily C; CosyVoice is Python; pick CosyVoice when cosyVoice is primarily Python; espeak-ng is C.

Markdown twin · espeak-ng alternatives · CosyVoice alternatives

GraphCanon updated today

espeak-ng logo

espeak-ng

espeak-ng/espeak-ng

★ 6.6kpushed Jun 29, 2026
vs
CosyVoice logo

CosyVoice

FunAudioLLM/CosyVoice

★ 22kpushed May 25, 2026

Trust & integrity

Signalespeak-ngCosyVoice
Maintenance
Active (12d since push)
As of today · github_public_v1
Steady (46d since push)
As of today · github_public_v1
Provenance
Not a fork · Organization account
As of today · github_public_v1
Not a fork · Organization account
As of today · github_public_v1
Security (OSV)
No lockfile
As of today · none
No lockfile
As of today · none
espeak-ng trust reportCosyVoice trust reportTrust methodology

Tagline

espeak-ng
eSpeak NG is an open source speech synthesizer that supports more than hundred languages and accents.
CosyVoice
Multi-lingual large voice generation model with full-stack abilities for inference, training and deployment.

Stars

espeak-ng
6.6k
CosyVoice
22k

Forks

espeak-ng
1.3k
CosyVoice
2.5k

Open issues

espeak-ng
617
CosyVoice
767

Language

espeak-ng
C
CosyVoice
Python

Adopt for

espeak-ng
-
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

espeak-ng
-
CosyVoice
-

Runtime

espeak-ng
-
CosyVoice
-

License

espeak-ng
GPL-3.0
CosyVoice
Apache-2.0

Last pushed

espeak-ng
Jun 29, 2026
CosyVoice
May 25, 2026

Categories

espeak-ng
Speech & Audio
CosyVoice
Inference & Serving, Model Training, Speech & Audio

Trust and health

Maintenance

espeak-ng
Active (82%)
CosyVoice
Steady (60%)

Days since push

espeak-ng
12d
CosyVoice
46d

Open issues (now)

espeak-ng
617
CosyVoice
767

Full report

espeak-ng
Trust report
CosyVoice
Trust report

Choose espeak-ng if…

  • espeak-ng is primarily C; CosyVoice is Python.
  • License: espeak-ng is GPL-3.0, CosyVoice is Apache-2.0.
  • Tags unique to espeak-ng: android, c++, espeak, espeak-ng.
GitHubDetails

Choose CosyVoice if…

  • CosyVoice is primarily Python; espeak-ng is C.
  • License: CosyVoice is Apache-2.0, espeak-ng is GPL-3.0.
  • Tags unique to CosyVoice: audio-generation, cantonese, chatbot, chatgpt.
  • 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.
GitHubDetails

Explore

espeak-ng trust report →CosyVoice trust report →Speech & Audio category →Inference & Serving category →Model Training category →All comparisonsStack workflowsTrending tools

Sources

Every stat on this page traces to a dated GitHub sync, license file, enrichment field, or trust scan.

GitHub stars on cards: espeak-ng 6.6k · CosyVoice 22k (synced Jul 11, 2026).

Common questions

What is the difference between espeak-ng and CosyVoice?
espeak-ng: eSpeak NG is an open source speech synthesizer that supports more than hundred languages and accents.. 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 espeak-ng over CosyVoice?
Choose espeak-ng over CosyVoice when espeak-ng is primarily C; CosyVoice is Python; License: espeak-ng is GPL-3.0, CosyVoice is Apache-2.0; Tags unique to espeak-ng: android, c++, espeak, espeak-ng.
When should I choose CosyVoice over espeak-ng?
Choose CosyVoice over espeak-ng when CosyVoice is primarily Python; espeak-ng is C; License: CosyVoice is Apache-2.0, espeak-ng is GPL-3.0; Tags unique to CosyVoice: audio-generation, cantonese, chatbot, chatgpt; Also covers Inference & Serving, Model Training; When you need support for multiple languages like Cantonese, Chinese, English, Japanese, and Korean.
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 espeak-ng or CosyVoice more popular on GitHub?
CosyVoice has more GitHub stars (22,089 vs 6,634). Stars measure visibility, not whether either tool fits your constraints.
Are espeak-ng and CosyVoice open source?
Yes - both are open-source projects on GitHub (espeak-ng: GPL-3.0, CosyVoice: Apache-2.0).
Where can I find alternatives to espeak-ng or CosyVoice?
GraphCanon lists graph-backed alternatives at espeak-ng alternatives and CosyVoice alternatives (espeak-ng 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, espeak-ng or CosyVoice?
espeak-ng: Active. 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 espeak-ng and CosyVoice?
GraphCanon publishes per-repo trust reports with dated maintenance, provenance, and scan summaries: espeak-ng trust report; CosyVoice trust report.