Piper
30+ languages on hardware as small as a Raspberry Pi.
90
sovereigntyPiper is a fast, local neural text-to-speech system built for constrained hardware — it runs comfortably on a Raspberry Pi and powers the voice in several self-hosted home-automation stacks. It covers 30+ languages with a large library of pre-trained voices. Quality does not match Kokoro or ElevenLabs, but nothing else runs this well with this little silicon.
OPEN SOURCEGPL-3.0SELF-HOSTLOCAL-FIRST
LicenseGPL-3.0
PricingFree — GPL-3.0. Runs on CPU, including single-board computers; effectively costs electricity.
Open sourceYes
Self-hostableYes
Local-first dataYes
What it does well
- +Runs on very low-power hardware, including a Raspberry Pi
- +30+ languages with a large pre-trained voice library
- +Fully offline — nothing leaves the device
- +Proven in production inside self-hosted voice assistants
Where it falls short
- −GPL-3.0 is copyleft — commercially usable, but check it against how you distribute
- −Noticeably behind Kokoro and ElevenLabs on naturalness
- −No voice cloning
Piper as an alternative to
Where Piper shows up in our comparisons, and how it ranked.
Piper head-to-head
Straight comparisons against the tools people weigh it against.