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Comparison

CosyVoice vs Speech

Verdict

Pick CosyVoice if 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; pick Speech if nVIDIA-NeMo/Speech - A scalable toolkit for speech AI tasks such as ASR, TTS, and speaker recognition built on PyTorch with CUDA support.

Markdown twin · CosyVoice alternatives · Speech alternatives

GraphCanon updated 2w

CosyVoice logo

CosyVoice

FunAudioLLM/CosyVoice

★ 22kpushed May 25, 2026
vs
Speech logo

Speech

NVIDIA-NeMo/Speech

★ 18kpushed Aug 7, 2026

Trust & integrity

SignalCosyVoiceSpeech
Maintenance
Steady (59d since push)
As of 4w · github_public_v1
Very active (0d since push)
As of 2w · github_public_v1
Provenance
Not a fork · Organization account
As of 4w · github_public_v1
Not a fork · Organization account
As of 2w · github_public_v1
OSV dependency advisories
No lockfile (source not queried)
As of 1mo · osv@v1
No lockfile (source not queried)
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
CosyVoice trust reportSpeech trust reportTrust methodology

Tagline

CosyVoice
Multi-lingual large voice generation model with full-stack abilities for inference, training and deployment.
Speech
A scalable generative AI framework for Speech AI

Stars

CosyVoice
22k
Speech
18k

Forks

CosyVoice
2.6k
Speech
3.5k

Open issues

CosyVoice
756
Speech
238

Language

CosyVoice
Python
Speech
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.
Speech
NVIDIA-NeMo/Speech - A scalable toolkit for speech AI tasks such as ASR, TTS, and speaker recognition built on PyTorch with CUDA support.

Persona

CosyVoice
-
Speech
-

Runtime

CosyVoice
-
Speech
-

License

CosyVoice
Apache-2.0
Speech
Apache-2.0

Last pushed

CosyVoice
May 25, 2026
Speech
Aug 7, 2026

Categories

CosyVoice
Inference & Serving, Model Training, Speech & Audio
Speech
Developer Tools, Model Training, Speech & Audio

Trust and health

Maintenance

CosyVoice
Steady (60%)
Speech
Very active (96%)

Days since push

CosyVoice
59d
Speech
0d

Open issues (now)

CosyVoice
756
Speech
238

Full report

CosyVoice
Trust report
Speech
Trust report

Shared compatibility

  • Python · CosyVoice: Python runtime · Speech: Python runtime

Choose CosyVoice if…

  • Tags unique to CosyVoice: audio-generation, cantonese, chatbot, chatgpt.
  • Also covers 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.
GitHubDetails

Choose Speech if…

  • Tags unique to Speech: asr, deeplearning, generative-ai, machine-translation.
  • Also covers Developer Tools.
  • When working on projects that require extensive GPU utilization for training large models due to its support for efficient CUDA usage.

When NOT to use Speech

  • For environments where GPU access is limited or unavailable since the toolkit highly recommends a GPU setup for both training and recommended for inference.
  • If your Python/PyTorch/CUDA versions fall below the specified requirements (Python 3.12+, PyTorch 2.7+), as lower versions will not be compatible with NeMo Speech.
  • In scenarios where you're working with models that do not require or benefit significantly from GPU acceleration, given its architecture optimized for GPU use.
GitHubDetails

Explore

CosyVoice trust report →Speech trust report →Inference & Serving category →Model Training category →Speech & Audio category →Developer Tools 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: CosyVoice 22k · Speech 18k (synced Jul 24, 2026).

Common questions

What is the difference between CosyVoice and Speech?
CosyVoice: Multi-lingual large voice generation model with full-stack abilities for inference, training and deployment.. Speech: A scalable generative AI framework for Speech AI. See the comparison table for live GitHub stats and shared categories.
When should I choose CosyVoice over Speech?
Choose CosyVoice over Speech when Tags unique to CosyVoice: audio-generation, cantonese, chatbot, chatgpt; Also covers Inference & Serving; When you need support for multiple languages like Cantonese, Chinese, English, Japanese, and Korean.
When should I choose Speech over CosyVoice?
Choose Speech over CosyVoice when Tags unique to Speech: asr, deeplearning, generative-ai, machine-translation; Also covers Developer Tools; When working on projects that require extensive GPU utilization for training large models due to its support for efficient CUDA usage.
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.
When should I avoid Speech?
For environments where GPU access is limited or unavailable since the toolkit highly recommends a GPU setup for both training and recommended for inference. If your Python/PyTorch/CUDA versions fall below the specified requirements (Python 3.12+, PyTorch 2.7+), as lower versions will not be compatible with NeMo Speech. In scenarios where you're working with models that do not require or benefit significantly from GPU acceleration, given its architecture optimized for GPU use.
Is CosyVoice or Speech more popular on GitHub?
CosyVoice has more GitHub stars (22,373 vs 17,940). Stars measure visibility, not whether either tool fits your constraints.
Are CosyVoice and Speech open source?
Yes - both are open-source projects on GitHub (CosyVoice: Apache-2.0, Speech: Apache-2.0).
Where can I find alternatives to CosyVoice or Speech?
GraphCanon lists graph-backed alternatives at CosyVoice alternatives and Speech alternatives (CosyVoice markdown twin, Speech 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 Speech?
CosyVoice: Steady. Speech: 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 Speech?
GraphCanon publishes per-repo trust reports with dated maintenance, provenance, and scan summaries: CosyVoice trust report; Speech trust report.

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