Compare software

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