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Real-CUGAN ncnn Vulkan vs Upscayl: catalog facts
Real-CUGAN ncnn Vulkan	Upscayl
Free Free and open source under the MIT license.	Free Free and open source under the AGPL. There is no paid tier and no per-image cost.
Windows, macOS, Linux	Windows, macOS, Linux
Runs on Intel, AMD, Nvidia and Apple Silicon GPUs Uses Vulkan for GPU inference	Runs entirely on your own machine, so no images are uploaded anywhere Batch processing for whole folders
The project describes itself as early in development	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: MIT	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 October 8, 2026	Official website Full listing and sources Checked September 21, 2026

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