What is ChatTTS used for?

ChatTTS from 2noise is a generative text-to-speech model tuned for conversational dialogue, such as LLM assistant replies, in English and Chinese. It is a good fit for voice for LLM assistants, generating conversational narration and research on dialogue speech synthesis.

Is ChatTTS open source?

Yes. ChatTTS is open source under the AGPL-3.0 licence. Its source code is on GitHub at 2noise/ChatTTS and is written mainly in Python.

Yes. ChatTTS is open source, so the software itself is free to use.

What is ChatTTS an alternative to?

ChatTTS is an open-source alternative to ElevenLabs, Murf AI and Speechify. Other open-source alternatives to ElevenLabs include Piper.

Is ChatTTS actively maintained?

The most recent commit to ChatTTS was on 10 April 2026, and the latest release is v0.2.5, published on 10 April 2026. The project has 40k stars on GitHub.

ChatTTS: open-source alternative to ElevenLabs, Murf AI

About ChatTTS

The 2noise project publishes ChatTTS, a generative speech model designed for daily dialogue. It turns text into natural-sounding conversational speech and is aimed especially at dialogue scenarios such as the voice of an LLM-powered assistant.

Supported languages are English and Chinese, with more planned. The repository contains the algorithm infrastructure and simple examples, while end-user products built on top of the model are collected in a community-maintained index called Awesome-ChatTTS. The model is implemented in Python with PyTorch and torchaudio, and the README is translated into several languages. The project highlights conversational speech with control over prosodic details such as laughter and pauses.

The code is released under AGPL-3.0 and runs on your own hardware, typically with a GPU for good speed. The model weights may carry separate terms from the code, so review those terms before any commercial use.

Key features

Text-to-speech optimized for dialogue
English and Chinese support
Control over laughter and pauses
PyTorch-based Python implementation
Suited to LLM assistant voices
Community ecosystem via Awesome-ChatTTS

Good fit for

→Voice for LLM assistants
→Generating conversational narration
→Research on dialogue speech synthesis

Built with: Python
Tags: text-to-speech; tts; chattts; speech-synthesis; pytorch; llm; python

ChatTTS: questions and answers

What is ChatTTS used for?: ChatTTS from 2noise is a generative text-to-speech model tuned for conversational dialogue, such as LLM assistant replies, in English and Chinese. It is a good fit for voice for LLM assistants, generating conversational narration and research on dialogue speech synthesis.
Is ChatTTS open source?: Yes. ChatTTS is open source under the AGPL-3.0 licence. Its source code is on GitHub at 2noise/ChatTTS and is written mainly in Python.
Is ChatTTS free?: Yes. ChatTTS is open source, so the software itself is free to use.
What is ChatTTS an alternative to?: ChatTTS is an open-source alternative to ElevenLabs, Murf AI and Speechify. Other open-source alternatives to ElevenLabs include Piper.
Is ChatTTS actively maintained?: The most recent commit to ChatTTS was on 10 April 2026, and the latest release is v0.2.5, published on 10 April 2026. The project has 40k stars on GitHub.