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SpaceSniffer vs DiskSavvy: catalog facts
SpaceSniffer	DiskSavvy
Free Freeware with donations welcomed. The source code is not published.	Freemium A free version is available, with paid editions for purchase.
Windows	Windows, Command line
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	Analyzes network shares and NAS devices as well as local disks Built-in file classification with charts and reports
Windows only Closed source freeware	Windows only Advanced features are in paid editions
Downloadable app	Downloadable app
Closed source	Closed source
License not stated	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.