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dupeGuru vs Gemini 2: catalog facts
dupeGuru	Gemini 2
Free Free and open source under the GPL 3.0.	Freemium Free download, with a paid license available to buy from MacPaw.
Windows, macOS, Linux	macOS
Fuzzy image matching finds resized and re-encoded copies Separate music mode that compares tags rather than bytes	Finds similar files as well as exact duplicates Scans Photos and Music libraries
Last release was July 2022 and the project is asking for maintainers Fuzzy matching is slow on very large photo collections	macOS only Full use requires a paid license
Downloadable app	Downloadable app
Open source	Closed source
License: GPL-3.0	License not stated
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 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.