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Upscaler vs waifu2x Snowshell: catalog facts
Upscaler	waifu2x Snowshell
Free Free and open source under the GPL-3.0 licence.	Free Free and open source under the MIT licence.
Linux	Windows
Runs fully offline on your own machine Sandboxed with no internet access	One interface for waifu2x, Real-CUGAN and Real-ESRGAN Drag and drop of multiple files or folders
Requires a Vulkan-capable GPU Linux only	Windows x64 only Depends on the separate upscaler engines for results
Downloadable app	Downloadable app
Open source	Open source
License: GPL-3.0	License: MIT
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 2, 2026

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