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Upscaler vs Upscayl: catalog facts
Upscaler	Upscayl
Free Free and open source under the GPL-3.0 licence.	Free Free and open source under the AGPL. There is no paid tier and no per-image cost.
Linux	Windows, macOS, Linux
Runs fully offline on your own machine Sandboxed with no internet access	Runs entirely on your own machine, so no images are uploaded anywhere Batch processing for whole folders
Requires a Vulkan-capable GPU Linux only	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
Open source	Open source
License: GPL-3.0	License: AGPL-3.0
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 September 21, 2026

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