Upscayl is a free, open-source tool that can handle batch jobs to upscale groups of images and that has unlimited cloud storage. It can upscale images up to 16x resolution and runs on Linux, MacOS and Windows, so it's a good option for creators, businesses and artists. And it can run offline with no network connection.
Another option is Let's Enhance, which offers more-advanced AI-powered image enhancement and batch editing abilities. It can upscale to 4K and beyond and comes with features like HDR filters for color grading, background removal and integration with APIs for other uses. It also offers a free trial and tiered pricing, so it can accommodate a range of professional and business needs.
VanceAI offers a range of photo editing tools, including AI upscaling, sharpening and background removal. It can handle batch jobs and offline processing, too, so it's good for large-scale image processing. VanceAI's tiered pricing and no watermark on output images also make it a good option for pros and businesspeople.