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Azul Box vs Stacher: catalog facts
Azul Box	Stacher
Free Free and open source under the GPL-3.0.	Freemium The yt-dlp GUI is free without limits; optional Stacher Premium supports the project.
Linux	Windows, macOS, Linux
Graphical front end for yt-dlp and ffmpeg MusicBrainz metadata for downloaded music	Point-and-click access to yt-dlp options Can install and manage yt-dlp and ffmpeg
Linux only Small single-developer project	Linux builds target Debian-based distributions Relies on third-party yt-dlp and ffmpeg
Downloadable app	Downloadable app
Open source	Closed source
License: GPL-3.0-only	License not stated
No account needed	No account needed
Not stated if it works offline	Not stated if it works offline
Official website Full listing and sources Checked October 1, 2026	Official website Full listing and sources Checked September 23, 2026

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