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Duc vs Dust: catalog facts
Duc	Dust
Free Free and open source.	Free The open-source application is available without a license fee.
Linux, Command line	Windows, macOS, Linux
Scales to hundreds of millions of files Fast browsing from a stored index	Size bars make large directories easy to spot
Results reflect the last index run, not live disk state Other systems need to build from source	Scanning is limited to files the current user can access.
Downloadable app	Downloadable app
Open source	Open source
License: LGPL-3.0	License: Apache-2.0
No account needed	Not stated if an account is needed
Works offline	Not stated if it works offline
Official website Full listing and sources Checked September 24, 2026	Official website Full listing and sources Checked September 22, 2026

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