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Fadr vs Audio Separator: catalog facts
Fadr	Audio Separator
Freemium Fadr Basic is free with unlimited use; Fadr Plus costs $10 a month or $100 a year.	Free Free and open source.
Web	Command line
Unlimited basic stem separation on the free plan Key, tempo, chord and MIDI detection alongside stems	Uses many pre-trained UVR separation models Works from the command line or as a Python library
Finer stems, WAV downloads and plugins require Fadr Plus Songs are uploaded to Fadr's servers for processing	No graphical interface Needs a Python environment and model downloads
Web application	Downloadable app
Closed source	Open source
License not stated	License: MIT
Account needed	No account needed
Needs internet	Not stated if it works offline
Official website Full listing and sources Checked September 26, 2026	Official website Full listing and sources Checked September 26, 2026

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