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WhatSize vs Disk Space Analyzer: catalog facts
WhatSize	Disk Space Analyzer
Paid Shareware costing $14.99, with a $9.99 upgrade price and a 30-day free trial.	Freemium Free download, with a paid Pro version.
macOS	macOS
Largest files and folders listed first Finder-style column view for drilling into folders	Sunburst and treemap views of disk usage Lists the biggest files in order
macOS only Paid after the 30-day trial	macOS only Some features require the paid version
Downloadable app	Downloadable app
Closed source	Closed source
License not stated	License not stated
No account needed	Not stated if an account is 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.