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Piper vs Bark: catalog facts
Piper	Bark
Free Free and open source under the GPL.	Free Free and open source under the MIT license.
Windows, macOS, Linux, Command line	Windows, macOS, Linux, Command line
Fast enough for low-power hardware like a Raspberry Pi Fully local speech output with no cloud dependency	Generates nonverbal sounds like laughter alongside speech MIT licensed for free local and commercial use
No graphical interface; aimed at command-line and integration use Voice quality depends on the chosen voice model	No repository update reflected since mid-2024 Slower and more resource-intensive than lightweight TTS alternatives
Downloadable app	Downloadable app, Self-hosted
Open source	Open source
License: GPL-3.0	License: MIT
No account needed	Not stated if an account is needed
Works offline	Not stated if it works offline
Official website Full listing and sources Checked September 23, 2026	Official website Full listing and sources Checked September 22, 2026

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