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WhatSize vs Radix: catalog facts
WhatSize	Radix
Paid Shareware costing $14.99, with a $9.99 upgrade price and a 30-day free trial.	Free Free and open source, with downloads on GitHub and Homebrew.
macOS	macOS
Largest files and folders listed first Finder-style column view for drilling into folders	Sunburst and treemap views of the same scan Compares scans to show what changed over time
macOS only Paid after the 30-day trial	Requires macOS 14 or later macOS only
Downloadable app	Downloadable app
Closed source	Open source
License not stated	License not stated
No account needed	No account needed
Works offline	Works offline
Official website Full listing and sources Checked October 1, 2026	Official website Full listing and sources Checked October 1, 2026

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