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Czkawka vs dupeGuru: catalog facts
Czkawka	dupeGuru
Free Free and open source under the MIT licence, with no advertising.	Free Free and open source under the GPL 3.0.
Windows, macOS, Linux, Android	Windows, macOS, Linux
Finds duplicates, similar images, similar videos and similar music Written in Rust and multithreaded, with caching for repeat scans	Fuzzy image matching finds resized and re-encoded copies Separate music mode that compares tags rather than bytes
The Czkawka GTK interface ends at 12.0; new work goes to Krokiet Similar-image matching produces false positives you must review	Last release was July 2022 and the project is asking for maintainers Fuzzy matching is slow on very large photo collections
Downloadable app	Downloadable app
Open source	Open source
License: MIT	License: GPL-3.0
No account needed	No account needed
Works offline	Works offline
Official website Full listing and sources Checked September 21, 2026	Official website Full listing and sources Checked September 21, 2026

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