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Allavsoft vs Parabolic: catalog facts
Allavsoft	Parabolic
Paid Free trial; the full version was listed at $19.99, down from $29.99.	Free Free and open source under the MIT licence.
Windows, macOS	Windows, macOS, Linux, Browser extension
Batch downloads of video, music and subtitles Converts to many audio and video formats	A real desktop interface for yt-dlp, covering hundreds of supported sites Downloads in MP4, WebM, MP3, Opus, FLAC and WAV
Paid after the trial Closed source	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
Downloadable app	Downloadable app, Browser extension
Closed source	Open source
License not stated	License: MIT
Not stated if an account is needed	No account needed
Not stated if it works offline	Needs internet
Official website Full listing and sources Checked October 1, 2026	Official website Full listing and sources Checked September 21, 2026

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