Skip to content
SPECIFICTION
Get listed

Piper

github.com

Free plan WebLinuxAPISelf-hosted
Visit github.com
Spec score 7.9 #13 of 39 in Gaming Peripheral Software

What it is

Piper is a free local neural text-to-speech engine that generates spoken audio from text. It supports 44 languages, embeds espeak-ng for phonemization and exports WAV files. The project lists API, Linux, self-hosted and web platforms. Users can work through a command-line interface, web server, Python API or C/C++ API, and the project links a Java binding called Piper JNI. Installation instructions use the command `pip install piper-tts`. The README also links guidance for training new voices. Piper is licensed under GPL-3.0, with a listed plan price of free. The README names Home Assistant, NVDA, Open Voice Operating System, JetsonGPT and LocalAI among projects using it. The Open Home Foundation owns and governs Piper as part of more than 250 open-source projects, standards, drivers and libraries. The foundation describes privacy, choice and sustainability as its smart-home principles and is seeking maintainers.

Spec sheet

Purpose
Piper is described as a fast, local neural text-to-speech engine.Read 8 Oct 2026 · github.com
Platforms
web,linux,apiRead 20 Sep 2026 · github.com
Free plan
YesRead 20 Sep 2026 · github.com
License
The repository lists GPL-3.0 as its license.Read 8 Oct 2026 · github.com
API access
YesRead 20 Sep 2026 · github.com
Commercial use
NoRead 20 Sep 2026 · github.com
Export formats
WAVRead 20 Sep 2026 · github.com
Foundation principles
The Open Home Foundation describes its principles as privacy, choice, and sustainability for smart homes.Read 8 Oct 2026 · openhomefoundation.org
Installation
The README says to install Piper with `pip install piper-tts`.Read 8 Oct 2026 · github.com
Integrations and users
The README lists Home Assistant, NVDA, Open Voice Operating System, JetsonGPT, and LocalAI among projects using Piper.Read 8 Oct 2026 · github.com
Interfaces
The project lists a command-line interface, web server, Python API, and C/C++ API.Read 8 Oct 2026 · github.com
Java support
The README links Piper JNI as a Java binding.Read 8 Oct 2026 · github.com
Languages
44Read 20 Sep 2026 · github.com
Maintainers
The README says the Open Home Foundation is looking for Piper maintainers and provides [email protected] for inquiries.Read 8 Oct 2026 · github.com
Phonemization
Piper embeds espeak-ng for phonemization.Read 8 Oct 2026 · github.com
Stewardship
The Open Home Foundation says it owns and governs Piper among more than 250 open-source projects, standards, drivers, and libraries.Read 8 Oct 2026 · openhomefoundation.org
Voice training
The README links instructions for training new voices.Read 8 Oct 2026 · github.com

Plans and prices

Piper Free GPL-3.0 licensed software Read 8 Oct 2026 · github.com

Every Piper plan and price →

Strong points and limits

Strong points

  • Supports 44 languages
  • Offers CLI, web and API interfaces
  • Runs locally across listed platforms
  • Exports WAV audio
  • Voice-training instructions are linked

Limits

  • Commercial use is marked No
  • GPL-3.0 license applies
  • Maintainers are being sought

Who it suits

Piper suits developers needing local speech synthesis through command-line, web or programming interfaces. Commercial use is marked No, so its listed terms do not suit commercial deployment.

Verdict

Piper provides multilingual local text-to-speech with several integration interfaces and WAV output. Its GPL-3.0 license and no-commercial-use designation are important constraints for adoption.

Where Specifiction places it

Alternatives to PiperAll alternatives →