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WinDirStat vs DiskSavvy: catalog facts
WinDirStat	DiskSavvy
Free Free and open source under the GPL 2.0.	Freemium A free version is available, with paid editions for purchase.
Windows	Windows, Command line
Treemap makes one enormous file obvious at a glance Finds duplicates by hash and compares logical against physical size	Analyzes network shares and NAS devices as well as local disks Built-in file classification with charts and reports
Windows only The treemap is dense and takes a moment to learn to read	Windows only Advanced features are in paid editions
Downloadable app	Downloadable app
Open source	Closed source
License: GPL-2.0	License not stated
No account needed	No account needed
Works offline	Works offline
Official website Full listing and sources Checked September 21, 2026	Official website Full listing and sources Checked September 24, 2026

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