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StemRoller vs Ultimate Vocal Remover: catalog facts
StemRoller	Ultimate Vocal Remover
Free Free, released under your choice of the Unlicense or MIT No Attribution.	Free Free and open source, with optional donations to the developers.
Windows, macOS	Windows, macOS, Linux
One-click stem separation using Demucs Built-in YouTube search to find songs	Separates vocals and instruments locally with no upload Ships many models trained by the project's own developers
Linux is not officially supported Splitting a song takes several minutes	Processing can be slow without a capable GPU Choosing between many models takes some experimentation
Downloadable app	Downloadable app
Open source	Open source
License: Unlicense OR MIT-0	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 October 2, 2026	Official website Full listing and sources Checked September 23, 2026

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