Compare software

dupeGuru vs AllDup: catalog facts
dupeGuru	AllDup
Free Free and open source under the GPL 3.0.	Free Freeware, free for private users and companies.
Windows, macOS, Linux	Windows
Fuzzy image matching finds resized and re-encoded copies Separate music mode that compares tags rather than bytes	Many comparison methods, including similar images and music Scans inside ZIP, RAR and 7Z archives
Last release was July 2022 and the project is asking for maintainers Fuzzy matching is slow on very large photo collections	Windows only Closed source
Downloadable app	Downloadable app
Open source	Closed source
License: GPL-3.0	License: Freeware
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 24, 2026

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