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HyperWhisper vs Speed of Sound: catalog facts
HyperWhisper	Speed of Sound
Free Open source under Apache-2.0; cloud transcription providers may charge for their own APIs.	Free Free and open source under the MIT licence; cloud LLM polishing uses your own provider.
Windows, macOS, Linux	Linux
Local models work fully offline Choice of 30+ local and cloud transcription models	Offline transcription with Whisper, Parakeet and Canary models Types into any app on X11 and Wayland
Cloud providers need separate API keys and may cost money Linux build is amd64 only	Linux only Accuracy depends on the model you download and your hardware
Downloadable app	Downloadable app
Open source	Open source
License: Apache-2.0	License: MIT
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

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