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SpaceSniffer vs FolderSizes: catalog facts
SpaceSniffer	FolderSizes
Free Freeware with donations welcomed. The source code is not published.	Freemium Free version available, with a paid Pro upgrade.
Windows	Windows
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	Analyses network shares as well as local drives Scheduled reports with email delivery
Windows only Closed source freeware	Windows only Some features require the paid Pro edition
Downloadable app	Downloadable app
Closed source	Closed source
License not stated	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.