imgix - Real-time Image Processing. Resize, crop, and process images on the fly, simply by changing their URLs.
Sirv - Dynamic image processing, hosting and rich-media for retailers and eCommerce.
Cloudimage - Cloudimage.io is the easiest way to resize, store, and deliver your images to your customers through a rocket fast CDN.
Uploadcare - File uploading, media processing & content delivery for modern web apps
ImageKit.io - Instant multi-platform image optimization
Upload - The best way to host files & images. Upload supports: file uploads, file storage, image processing, and image optimization through a worldwide image CDN.