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Duc vs DiskSavvy: catalog facts
Duc	DiskSavvy
Free Free and open source.	Freemium A free version is available, with paid editions for purchase.
Linux, Command line	Windows, Command line
Scales to hundreds of millions of files Fast browsing from a stored index	Analyzes network shares and NAS devices as well as local disks Built-in file classification with charts and reports
Results reflect the last index run, not live disk state Other systems need to build from source	Windows only Advanced features are in paid editions
Downloadable app	Downloadable app
Open source	Closed source
License: LGPL-3.0	License not stated
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.