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K4DirStat vs GrandPerspective: catalog facts
K4DirStat	GrandPerspective
Free Free to use, with source code published on GitHub.	Free Free and open source under the GPL.
Linux	macOS
Shows directory sizes both as a list and as a treemap Works like a graphical version of du	Saved scans can be compared to see what grew since last time Deletes or reveals a file straight from the map
Built on Qt 5 and KDE Frameworks 5, so it fits a KDE desktop best Documentation lives in a GitHub wiki rather than a dedicated site	macOS only, and the interface is deliberately plain
Downloadable app	Downloadable app
Open source	Open source
License not stated	License: GPL-2.0
No account needed	Not stated if an account is needed
Works offline	Not stated if it works offline
Official website Full listing and sources Checked September 23, 2026	Official website Full listing and sources Checked September 22, 2026

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