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GrandPerspective vs Radix: catalog facts
GrandPerspective	Radix
Free Free and open source under the GPL.	Free Free and open source, with downloads on GitHub and Homebrew.
macOS	macOS
Saved scans can be compared to see what grew since last time Deletes or reveals a file straight from the map	Sunburst and treemap views of the same scan Compares scans to show what changed over time
macOS only, and the interface is deliberately plain	Requires macOS 14 or later macOS only
Downloadable app	Downloadable app
Open source	Open source
License: GPL-2.0	License not stated
Not stated if an account is needed	No account needed
Not stated if it works offline	Works offline
Official website Full listing and sources Checked September 22, 2026	Official website Full listing and sources Checked October 1, 2026

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