Compare software

RespeecherAltered Studio
Freemium

Free testing of the TTS API, with paid usage and custom pricing for studio projects.

 Freemium

Commercial product; check the Altered site for current plans and prices.

Web Windows, macOS, Web
  • Track record on major film and TV productions
  • Voice Marketplace with a Pro Tools plugin
  • Speech-to-speech conversion keeps the timing and inflection of your performance
  • Curated library of voices plus custom voices
  • Much of the offering is managed services arranged through sales
  • Aimed at professional production rather than casual use
  • Proprietary software
  • Pricing and plan limits are not clear from the homepage
Web application, Hosted service Downloadable app, Web application
Closed source Closed source
License not stated License not stated
Account needed Not stated if an account is needed
Not stated if it works offline Not stated if it works offline

Checked October 1, 2026

Checked September 26, 2026

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