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FolderSizes vs SpaceSniffer: catalog facts
FolderSizes	SpaceSniffer
Freemium Free version available, with a paid Pro upgrade.	Free Freeware with donations welcomed. The source code is not published.
Windows	Windows
Analyses network shares as well as local drives Scheduled reports with email delivery	A treemap makes the biggest space consumers obvious at a glance Drill down with one click, zoom with a double-click, filter by file type
Windows only Some features require the paid Pro edition	Windows only Closed source freeware
Downloadable app	Downloadable app
Closed source	Closed source
License not stated	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 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.