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Google Cloud Text-to-Speech vs Piper: catalog facts
Google Cloud Text-to-Speech	Piper
Paid Billed through a Google Cloud account; rates are on Google's pricing page.	Free Free and open source under the GPL.
Web	Windows, macOS, Linux, Command line
More than 380 voices across 75+ languages and variants Gemini-powered voices	Fast enough for low-power hardware like a Raspberry Pi Fully local speech output with no cloud dependency
Requires a Google Cloud account and billing setup Built for developers calling an API, not for casual use	No graphical interface; aimed at command-line and integration use Voice quality depends on the chosen voice model
Hosted service	Downloadable app
Closed source	Open source
License not stated	License: GPL-3.0
Account needed	No account needed
Needs internet	Works offline
Official website Full listing and sources Checked October 2, 2026	Official website Full listing and sources Checked September 23, 2026

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