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SpaceSniffer vs Space Radar: catalog facts
SpaceSniffer	Space Radar
Free Freeware with donations welcomed. The source code is not published.	Free Free and open source under the MIT licence.
Windows	Windows, macOS, Linux
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	Three chart types: sunburst, treemap and flamegraph Shows results while the scan is still running
Windows only Closed source freeware	Documentation is limited to the README Small hobby project without a dedicated website
Downloadable app	Downloadable app
Closed source	Open source
License not stated	License: MIT
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 October 2, 2026

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