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Space Radar vs SpaceSniffer: catalog facts
Space Radar	SpaceSniffer
Free Free and open source under the MIT licence.	Free Freeware with donations welcomed. The source code is not published.
Windows, macOS, Linux	Windows
Three chart types: sunburst, treemap and flamegraph Shows results while the scan is still running	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
Documentation is limited to the README Small hobby project without a dedicated website	Windows only Closed source freeware
Downloadable app	Downloadable app
Open source	Closed source
License: MIT	License not stated
No account needed	No account needed
Works offline	Works offline
Official website Full listing and sources Checked October 2, 2026	Official website Full listing and sources Checked September 21, 2026

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