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FolderSizes vs WinDirStat: catalog facts
FolderSizes	WinDirStat
Freemium Free version available, with a paid Pro upgrade.	Free Free and open source under the GPL 2.0.
Windows	Windows
Analyses network shares as well as local drives Scheduled reports with email delivery	Treemap makes one enormous file obvious at a glance Finds duplicates by hash and compares logical against physical size
Windows only Some features require the paid Pro edition	Windows only The treemap is dense and takes a moment to learn to read
Downloadable app	Downloadable app
Closed source	Open source
License not stated	License: GPL-2.0
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 24, 2026	Official website Full listing and sources Checked September 21, 2026

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