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Disk Space Analyzer vs OpenDisk: catalog facts
Disk Space Analyzer	OpenDisk
Freemium Free download, with a paid Pro version.	Free Free and open source under the MIT licence.
macOS	macOS
Sunburst and treemap views of disk usage Lists the biggest files in order	Interactive sunburst view with one-click cleanup Incremental repeat scans
macOS only Some features require the paid version	macOS only Requires macOS 15 Sequoia or later
Downloadable app	Downloadable app
Closed source	Open source
License not stated	License: MIT
Not stated if an account is 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 2, 2026

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