After a month long POCs - We migrated from Akamai Image Converter tool to ImageKit in 10 minutes and had really an amazing experience. Performance was much better than Akamai with 30-40% faster site loading, lesser bandwidth and last but not the least - 60% lesser cost.
I strogly recommend ImageKit.
This is one of the best supportive team i have ever interacted with. Keep it up guys :)
I am a prolific user that consumes about 1.5TB bandwidth and I moved from Cloudinary, we are tech folks so we dont have any issues and Manu (founder) is very accessible that helps.
I can recommend ImageKit that I've been using for a couple of months (I guess I'm one of the first users). It makes slightly smaller images than Google's image optimiser without adding noticable visual noise. This is still an early product and I'm sure they going to support better the enterprise-y features such as signed repos, custom storage and distribution (Big Shots usually have their own CDN), batch processing and support for videos. Anyway, it is quite handy already, especially if you don't have a strong oppinion how the images need to be delivered / processed.
The team was really supportive and their tool is great and simple to integrate on any e-commerce site. They support out of the box Magento, Wordpress and others.