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

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