Open-source alternatives to Azure AI Speech TTS

Piper

Fast local text to speech that runs well on small computers such as a Raspberry Pi.

SaaS: YesClosed product: No

GitHub stars

5.7k

Deployment

Library

GPT-SoVITS

Voice cloning and text-to-speech tool that can be trained on a short voice recording.

SaaS: YesClosed product: Yes

GitHub stars

62.3k

Deployment

Desktop

ChatTTS

Text-to-speech model tuned for everyday dialogue, mainly Chinese and English.

SaaS: Yes, with conditionsClosed product: No

GitHub stars

39.9k

Deployment

Library

Chatterbox

Text-to-speech model from Resemble AI with voice cloning and adjustable expressiveness.

SaaS: YesClosed product: Yes

GitHub stars

26.7k

Deployment

Library

IndexTTS

Text-to-speech system that can mimic a voice from a short sample and control pacing and expression.

SaaS: Yes, with conditionsClosed product: Yes, with conditions

GitHub stars

24.3k

Deployment

Library

CosyVoice

Multilingual text-to-speech model with code for inference, training and deployment.

SaaS: YesClosed product: Yes

GitHub stars

23.8k

Deployment

Library

F5-TTS

Research code for the F5-TTS text-to-speech model, which can mimic a voice from a short sample.

SaaS: YesClosed product: Yes

GitHub stars

15.3k

Deployment

Library

Coqui TTS (Idiap fork)

Maintained continuation of Coqui TTS, a deep-learning toolkit for text to speech.

SaaS: YesClosed product: Yes, with conditions

GitHub stars

2.3k

Deployment

Library

Kokoro-82M

Very small text-to-speech model that produces natural speech and runs on an ordinary computer. Based on yl4579/StyleTTS2-LJSpeech.

SaaS: YesClosed product: Yes

Dia-1.6B

Text-to-speech model from Nari Labs that generates multi-speaker dialogue from a script.

SaaS: YesClosed product: Yes

VibeVoice-1.5B

Text-to-speech model from Microsoft for long multi-speaker conversations, such as podcasts.

SaaS: YesClosed product: Yes

Deployment

transformers

csm-1b

Speech model from Sesame that generates speech from text and conversational context.

SaaS: YesClosed product: Yes

Deployment

transformers

chatterbox

Text-to-speech model from Resemble AI with voice cloning and adjustable expressiveness. The model card lists Swedish support.

SaaS: YesClosed product: Yes

Deployment

chatterbox

piper-voices

Collection of ready-made voices for the Piper text-to-speech engine, in many languages. The model card lists Swedish support.

SaaS: YesClosed product: Yes