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Cisdem Duplicate Finder vs AllDup: catalog facts
Cisdem Duplicate Finder	AllDup
Paid Free download to try, with a paid license for full use.	Free Freeware, free for private users and companies.
Windows, macOS, iOS	Windows
Compares files by content, not just names Finds similar photos as well as exact duplicates	Many comparison methods, including similar images and music Scans inside ZIP, RAR and 7Z archives
Full version requires purchase Closed source	Windows only Closed source
Downloadable app	Downloadable app
Closed source	Closed source
License not stated	License: Freeware
Not stated if an account is 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 24, 2026

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