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Chatterbox vs IndexTTS: catalog facts
Chatterbox	IndexTTS
Free Free and open source under the MIT license.	Free Free to download and run from the GitHub repository.
Windows, macOS, Linux, Command line	Command line
Zero-shot voice cloning from a very short audio sample MIT licensed for unrestricted local use	Zero-shot voice cloning from a reference sample Control over emotion and duration
Generation quality and speed depend on available local hardware No dedicated GUI application, mainly used through code	Requires a Python setup and suitable hardware License terms need checking before commercial use
Downloadable app, Self-hosted	Downloadable app
Open source	Closed source
License: MIT	License not stated
Not stated if an account is needed	No account needed
Not stated if it works offline	Works offline
Official website Full listing and sources Checked September 22, 2026	Official website Full listing and sources Checked September 26, 2026

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