Compare software

SpaceSniffer vs WinDirStat: catalog facts
SpaceSniffer	WinDirStat
Free Freeware with donations welcomed. The source code is not published.	Free Free and open source under the GPL 2.0.
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	Treemap makes one enormous file obvious at a glance Finds duplicates by hash and compares logical against physical size
Windows only Closed source freeware	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
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 21, 2026

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