Google Cloud Filestore - Fully-managed cloud file storage
imgix - Real-time Image Processing. Resize, crop, and process images on the fly, simply by changing their URLs.
Azure File Storage - Try Azure File Storage for managed file shares that use standard SMB 3.0 protocol. Share data with on-premises and cloud servers, integrate with apps, and more.
Cloudimage - Cloudimage.io is the easiest way to resize, store, and deliver your images to your customers through a rocket fast CDN.
Igloo Software - Igloo is a modern intranet, it connects people with the information they need to do their best work.
Sirv - Dynamic image processing, hosting and rich-media for retailers and eCommerce.