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Confucius4-TTS

Free#50 of 222 in Text-to-Speech Software

Confucius4-TTS: A self-hosted TTS engine for multilingual cloning, emotion transfer, and streaming APIs. Ranked #50 of 222 in Text-to-Speech Software by our editors (4.4/10); pricing: Open source; best for researchers needing open multilingual voice cloning.

4.4/10Editor score
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Confucius4-TTS4.4 Visit Confucius4-TTS

At a glance

  • Editor score
    4.4 / 10
  • Pricing
    Open source
  • Best for
    Researchers needing open multilingual voice cloning
  • Paid from
    Free
  • Commercial use
    Yes
  • Facts checked
    20 Sep 2026
Confucius4-TTS screenshot

  • Where it wins

    • Supports multilingual synthesis across 14 languages
    • Offers zero-shot cloning and cross-lingual voice transfer
    • Includes Python, FastAPI, Gradio, and streaming interfaces

  • Where it doesn't

    • Primarily requires self-hosted deployment
    • Local inference requires Python and CUDA
    • Export formats are limited to WAV and PCM

Our verdict on Confucius4-TTS

Confucius4-TTS is an open-source text-to-speech system for researchers and developers building multilingual voice applications. It supports speech synthesis in 14 languages, preserves speaker identity across languages, and provides zero-shot voice cloning without a reference transcript. Emotion transfer adds another layer of control, while commercial use is supported. The project runs locally with Python and CUDA, making it a fit for teams that want open deployment rather than a vendor-hosted subscription service.

Its strongest advantage is the combination of multilingual and cross-lingual capabilities. A voice can transfer across supported languages, and cloning does not require a reference transcript. The software includes a Python inference API, a Gradio web interface, and a FastAPI service with both streaming and non-streaming endpoints. vLLM acceleration is available for the text-to-semantic stage. These interfaces give researchers several ways to integrate or evaluate the system across web, API, Linux, and self-hosted environments.

The trade-off is deployment responsibility. Confucius4-TTS is primarily self-hosted, so it suits users comfortable with local inference, Python, CUDA, and service configuration more than buyers seeking a managed web product. Its listed export formats are WAV and PCM, which may be sufficient for many speech workflows but provide a narrower documented output range. Choose it for open multilingual research, voice cloning experiments, and customizable API deployment; choose another product if you need vendor-hosted plans, a simpler onboarding path, or broader documented export options.

Your product? Our editors can test Confucius4-TTS in depth and publish a review, labelled as paid · from $149/mo →

Confucius4-TTS pricing

Plans Open sourceFree Free to use — no paid tier required for the core job.
See plans on github.com

Confucius4-TTS fact sheet

Free planNot verified
Paid fromFree
Commercial useYes
Voice cloningYes
API accessYes
Languages14 languages
Maximum inputNot verified
Export formatsWAV, PCM
Platformsweb, api, linux, self_hosted
DeploymentCloud, Self-hosted, Browser extension
PlatformsWeb, Linux
SupportDocs
Built forSolo, Small business, Mid-market, Enterprise (editorial estimate)
PricingOpen source
Websitegithub.com
Facts checked20 Sep 2026

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Featured on iTechGuides

Featured on iTechGuides — Confucius4-TTS 4.4/10

Confucius4-TTS is listed in our Text-to-Speech Software directory. Add the badge to your site — it links back to this page.

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Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026

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