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Parabolic vs Azul Box: catalog facts
Parabolic	Azul Box
Free Free and open source under the MIT licence.	Free Free and open source under the GPL-3.0.
Windows, macOS, Linux, Browser extension	Linux
A real desktop interface for yt-dlp, covering hundreds of supported sites Downloads in MP4, WebM, MP3, Opus, FLAC and WAV	Graphical front end for yt-dlp and ffmpeg MusicBrainz metadata for downloaded music
The authors note that content may be DMCA protected and disclaim responsibility for unlawful use It inherits yt-dlp's breakages when a site changes	Linux only Small single-developer project
Downloadable app, Browser extension	Downloadable app
Open source	Open source
License: MIT	License: GPL-3.0-only
No account needed	No account needed
Needs internet	Not stated if it works offline
Official website Full listing and sources Checked September 21, 2026	Official website Full listing and sources Checked October 1, 2026

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