Piper (Rhasspy)

by Rhasspy

Fast, on-device neural TTS optimized for Raspberry Pi 4.

TL;DR

Fast, on-device neural TTS optimized for Raspberry Pi 4.

Best for home Assistant / Wyoming-protocol setups needing fast offline TTS on a Pi 4. Pricing: free (MIT).

Category
Open source
License
—
Stars
—
Last push
—
Pricing
free (MIT)
Platforms
Linux, macOS, Windows, Raspberry Pi

What it is

Piper is Rhasspy's current-generation TTS, optimized for Raspberry Pi 4-class hardware. Wyoming-protocol support makes it a drop-in TTS for Home Assistant Assist alongside Vosk for STT. 30+ languages and ~100 voices. MIT. Consent posture: synthetic-only — no cloning surface.

Best for: Home Assistant / Wyoming-protocol setups needing fast offline TTS on a Pi 4.
Watch out for: Synthetic voices only — no cloning surface.

Install / use

Download from github.com/rhasspy/piper/releases

Features

Speaker diarizationNo
Word-level timestampsNo
Streaming / real-timeNo
Languages supported30
HIPAA eligibleNo

Piper (Rhasspy) vs Whipscribe

FeaturePiper (Rhasspy)Whipscribe
CategoryOpen sourceTranscription APIs
Pricingfree (MIT)free beta
Speaker diarization—Yes
Word timestamps—Yes
Streaming—No
Languages3099
PlatformsLinux, macOS, Windows, Raspberry PiWeb, API, MCP

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