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GIMP vs Sly: catalog facts
GIMP	Sly
Free Free software under the GNU GPL; there is no paid edition and no subscription.	Free Free and open source with no ads or subscriptions; donations welcome.
Windows, macOS, Linux	macOS, Linux, Android, iOS
Full layer, mask, selection and path editing for photo retouching and composites Runs on Linux, macOS and Windows from one project	Easy to use without editing experience Photos are processed locally and never uploaded
The interface follows its own conventions, so Photoshop habits do not transfer cleanly CMYK support for print work is still limited compared with commercial editors	No Windows version yet Basic adjustments rather than a full editing suite
Downloadable app	Downloadable app
Open source	Open source
License: GPL-3.0-or-later	License: GPL-3.0-or-later
No account needed	No account needed
Works offline	Works offline
Official website Full listing and sources Checked September 20, 2026	Official website Full listing and sources Checked October 1, 2026

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