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eSpeak NGPiper
Free

The open-source software is available without a license fee. Hosting, hardware and…

 Free

Free and open source under the GPL.

Windows, macOS, Linux, Android Windows, macOS, Linux, Command line
  • Supports many languages without large recorded voice libraries.
  • Fast enough for low-power hardware like a Raspberry Pi
  • Fully local speech output with no cloud dependency
  • Its synthetic voices sound less natural than recording-based speech systems.
  • 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: GPL-3.0 License: GPL-3.0
Not stated if an account is needed No account needed
Not stated if it works offline Works offline

Checked September 22, 2026

Checked September 23, 2026

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