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PhotoFlare vs Sly: catalog facts
PhotoFlare	Sly
Free The software is free under its open-source licence. Hosting, hardware and external…	Free Free and open source with no ads or subscriptions; donations welcome.
Windows, macOS, Linux	macOS, Linux, Android, iOS
Batch image processing is built in, so the same crop, resize or filter can be applied across a…	Easy to use without editing experience Photos are processed locally and never uploaded
There are no layers and no non-destructive editing, so it is not a GIMP or Photoshop replacement.	No Windows version yet Basic adjustments rather than a full editing suite
Downloadable app	Downloadable app
Open source	Open source
License: GPL-3.0	License: GPL-3.0-or-later
Not stated if an account is needed	No account needed
Not stated if it works offline	Works offline
Official website Full listing and sources Checked September 22, 2026	Official website Full listing and sources Checked October 1, 2026

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