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ColorZilla vs Gpick: catalog facts
ColorZilla	Gpick
Free Free browser extension.	Free Free and open source.
Browser extension	Windows, Linux
Works directly in the browser without a separate app Gradient generator is a bonus beyond simple color picking	Samples colors from anywhere on the desktop Builds and edits palettes for design applications
Limited to what's visible in the browser window No native desktop app outside the browser	No macOS build mentioned GTK interface may feel out of place on Windows
Browser extension	Downloadable app
Closed source	Open source
License not stated	License not stated
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 September 23, 2026

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