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whisper.cpp vs WhisperX: catalog facts
whisper.cpp	WhisperX
Free Free and open source.	Free Free to use from its GitHub repository.
Windows, macOS, Linux, Command line	Command line
Transcribes speech fully offline No Python dependency	Word-level timestamps for subtitles and transcripts Speaker diarization identifies who is talking
Mainly a command-line tool with no bundled graphical interface Models must be downloaded separately	GPU setup with CUDA and cuDNN can take some troubleshooting Command-line and Python only, no graphical interface
Downloadable app	Downloadable app
Open source	Closed source
License: MIT	License not stated
No account needed	Not stated if an account is needed
Works offline	Not stated if it works offline
Official website Full listing and sources Checked September 23, 2026	Official website Full listing and sources Checked September 24, 2026

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