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Waifu2x-Extension-GUI vs Upscayl: catalog facts
Waifu2x-Extension-GUI	Upscayl
Freemium Free for personal use under the project licence. Commercial use requires the paid Premium…	Free Free and open source under the AGPL. There is no paid tier and no per-image cost.
Windows	Windows, macOS, Linux
It bundles several upscaling and frame-interpolation engines behind one Windows interface and works with AMD, Intel and…	Runs entirely on your own machine, so no images are uploaded anywhere Batch processing for whole folders
The licence permits personal use only, so commercial use requires buying the Premium build, and the code is…	Needs a Vulkan-compatible GPU; the project warns many integrated chips will not work Slow on weaker hardware, and memory-hungry on large images
Downloadable app	Downloadable app
Closed source	Open source
License not stated	License: AGPL-3.0
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 21, 2026

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