Compare software

IndexTTS vs Spark-TTS: catalog facts
IndexTTS	Spark-TTS
Free Free to download and run from the GitHub repository.	Free Free to download and run locally.
Command line	Windows, macOS, Linux, Command line
Zero-shot voice cloning from a reference sample Control over emotion and duration	Voice cloning from a short sample Command line and local web interface
Requires a Python setup and suitable hardware License terms need checking before commercial use	Requires Python and model downloads to set up No repository activity since April 2025
Downloadable app	Downloadable app
Closed source	Closed source
License not stated	License not stated
No account needed	No account needed
Works offline	Works offline
Official website Full listing and sources Checked September 26, 2026	Official website Full listing and sources Checked October 2, 2026

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