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

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