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YOGA Image Optimizer vs Klia Kompress: catalog facts
YOGA Image Optimizer	Klia Kompress
Free Free and open source under the GPL-3.0 licence.	Free No price is mentioned; the app is published on Flathub under a proprietary EULA.
Windows, Linux	Linux
Simple drag and drop workflow Converts between JPEG, PNG and WebP	Processes files locally without uploading Batch conversion with quality control
JPEG optimization is slow and memory hungry Small gains when optimizing WebP files	Proprietary, source not published Very new project with little history
Downloadable app	Downloadable app
Open source	Closed source
License: GPL-3.0-or-later	License: Proprietary EULA
No account 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.