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Speech Note vs Piper: catalog facts
Speech Note	Piper
Free Free and open source under the Mozilla Public License 2.0.	Free Free and open source under the GPL.
Linux	Windows, macOS, Linux, Command line
Speech recognition, speech synthesis and translation all run offline Wide choice of engines, including Whisper, Piper and Kokoro	Fast enough for low-power hardware like a Raspberry Pi Fully local speech output with no cloud dependency
Linux and Sailfish OS only Models must be downloaded separately and can be large	No graphical interface; aimed at command-line and integration use Voice quality depends on the chosen voice model
Downloadable app	Downloadable app
Open source	Open source
License: MPL-2.0	License: GPL-3.0
No account needed	No account needed
Works offline	Works offline
Official website Full listing and sources Checked September 26, 2026	Official website Full listing and sources Checked September 23, 2026

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