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Czkawka vs Cisdem Duplicate Finder: catalog facts
Czkawka	Cisdem Duplicate Finder
Free Free and open source under the MIT licence, with no advertising.	Paid Free download to try, with a paid license for full use.
Windows, macOS, Linux, Android	Windows, macOS, iOS
Finds duplicates, similar images, similar videos and similar music Written in Rust and multithreaded, with caching for repeat scans	Compares files by content, not just names Finds similar photos as well as exact duplicates
The Czkawka GTK interface ends at 12.0; new work goes to Krokiet Similar-image matching produces false positives you must review	Full version requires purchase Closed source
Downloadable app	Downloadable app
Open source	Closed source
License: MIT	License not stated
No account needed	Not stated if an account is needed
Works offline	Works offline
Official website Full listing and sources Checked September 21, 2026	Official website Full listing and sources Checked October 2, 2026

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