Compare software

ChatTTS vs IndexTTS: catalog facts
ChatTTS	IndexTTS
Free Free; the code is AGPL-3.0 and the released model is for academic use.	Free Free to download and run from the GitHub repository.
Command line	Command line
Natural conversational prosody with laughter and pauses Multiple speakers in one model	Zero-shot voice cloning from a reference sample Control over emotion and duration
Only English and Chinese supported Released model is restricted to academic use	Requires a Python setup and suitable hardware License terms need checking before commercial use
Downloadable app	Downloadable app
Open source	Closed source
License: AGPL-3.0	License not stated
No account needed	No account needed
Works offline	Works offline
Official website Full listing and sources Checked October 2, 2026	Official website Full listing and sources Checked September 26, 2026

Catalog facts only. Anything “not stated” is unconfirmed. Check full listings for details.