Compare software

OpenDisk vs WhatSize: catalog facts
OpenDisk	WhatSize
Free Free and open source under the MIT licence.	Paid Shareware costing $14.99, with a $9.99 upgrade price and a 30-day free trial.
macOS	macOS
Interactive sunburst view with one-click cleanup Incremental repeat scans	Largest files and folders listed first Finder-style column view for drilling into folders
macOS only Requires macOS 15 Sequoia or later	macOS only Paid after the 30-day trial
Downloadable app	Downloadable app
Open source	Closed source
License: MIT	License not stated
No account needed	No account needed
Works offline	Works offline
Official website Full listing and sources Checked October 2, 2026	Official website Full listing and sources Checked October 1, 2026

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