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WinDirStat vs FolderSizes: catalog facts
WinDirStat	FolderSizes
Free Free and open source under the GPL 2.0.	Freemium Free version available, with a paid Pro upgrade.
Windows	Windows
Treemap makes one enormous file obvious at a glance Finds duplicates by hash and compares logical against physical size	Analyses network shares as well as local drives Scheduled reports with email delivery
Windows only The treemap is dense and takes a moment to learn to read	Windows only Some features require the paid Pro edition
Downloadable app	Downloadable app
Open source	Closed source
License: GPL-2.0	License not stated
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 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.