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DiskSavvy vs Duc: catalog facts
DiskSavvy	Duc
Freemium A free version is available, with paid editions for purchase.	Free Free and open source.
Windows, Command line	Linux, Command line
Analyzes network shares and NAS devices as well as local disks Built-in file classification with charts and reports	Scales to hundreds of millions of files Fast browsing from a stored index
Windows only Advanced features are in paid editions	Results reflect the last index run, not live disk state Other systems need to build from source
Downloadable app	Downloadable app
Closed source	Open source
License not stated	License: LGPL-3.0
No account needed	No account needed
Works offline	Works offline
Official website Full listing and sources Checked September 24, 2026	Official website Full listing and sources Checked September 24, 2026

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