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Speed of Sound vs HyperWhisper: catalog facts
Speed of Sound	HyperWhisper
Free Free and open source under the MIT licence; cloud LLM polishing uses your own provider.	Free Open source under Apache-2.0; cloud transcription providers may charge for their own APIs.
Linux	Windows, macOS, Linux
Offline transcription with Whisper, Parakeet and Canary models Types into any app on X11 and Wayland	Local models work fully offline Choice of 30+ local and cloud transcription models
Linux only Accuracy depends on the model you download and your hardware	Cloud providers need separate API keys and may cost money Linux build is amd64 only
Downloadable app	Downloadable app
Open source	Open source
License: MIT	License: Apache-2.0
No account needed	No account needed
Works offline	Works offline
Official website Full listing and sources Checked October 1, 2026	Official website Full listing and sources Checked October 1, 2026

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