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OptiImage vs Zipic: catalog facts
OptiImage	Zipic
Free Free and open source under the LGPL-2.1-only licence.	Freemium 25 free images per day with basic features; Pro is a one-time purchase.
Linux	Windows, macOS, Command line
Lossless and lossy compression modes Option to keep or remove metadata	Processes images locally Wide format support including AVIF and JPEG XL
Linux only Young project, first released in late 2024	Free tier limited to 25 images per day Windows version still in beta
Downloadable app	Downloadable app
Open source	Closed source
License: LGPL-2.1-only	License not stated
No account needed	Not stated if an account is 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.