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edge-ttsPiper
Free

Free and open source; it uses Microsoft's online service at no cost.

 Free

Free and open source under the GPL.

Windows, macOS, Linux, Command line Windows, macOS, Linux, Command line
  • No API key or Microsoft account needed
  • Writes subtitles alongside the audio
  • Fast enough for low-power hardware like a Raspberry Pi
  • Fully local speech output with no cloud dependency
  • Depends on Microsoft's online service, so it needs internet and could break if the service changes
  • Playback command needs mpv on macOS and Linux
  • No graphical interface; aimed at command-line and integration use
  • Voice quality depends on the chosen voice model
Downloadable app Downloadable app
Open source Open source
License: LGPL-3.0 License: GPL-3.0
No account needed No account needed
Needs internet Works offline

Checked October 2, 2026

Checked September 23, 2026

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