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ImageFlow vs Gifski: catalog facts
ImageFlow	Gifski
Free Free and open source under the GPL-3.0-or-later licence.	Free Free and open source; a separate commercial license is available for closed-source use.
Linux	Windows, macOS, Linux, Command line
Outputs both GIF and WebP Exposes palette, dithering and frame rate settings	Thousands of colors per frame with temporal dithering Resize and compression controls for size limits
Small project with a single maintainer Linux only	Output is limited by the GIF format itself GUI apps for Windows and macOS are maintained separately
Downloadable app	Downloadable app
Open source	Open source
License: GPL-3.0-or-later	License: AGPL-3.0
Not stated if an account is needed	No account needed
Works offline	Works offline
Official website Full listing and sources Checked October 1, 2026	Official website Full listing and sources Checked October 1, 2026

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