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SquirrelDisk vs Space Radar: catalog facts
SquirrelDisk	Space Radar
Free Free and open source.	Free Free and open source under the MIT licence.
Windows, macOS, Linux, Command line	Windows, macOS, Linux
Sunburst and treemap views Scans remote servers over SSH and cloud storage	Three chart types: sunburst, treemap and flamegraph Shows results while the scan is still running
Visual charts can be less precise than a plain sorted list	Documentation is limited to the README Small hobby project without a dedicated website
Downloadable app	Downloadable app
Open 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 October 2, 2026	Official website Full listing and sources Checked October 2, 2026

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