There may be more CDNs but most of them aren't that great… CloudFront has HTTP/2 prioritisation, and concatenation issues Many of the others build on nginx wh

There may be more CDNs but most of them aren't that great… CloudFront has HTTP/2 prioritisation, and concatenation issues Many of the others build on nginx which also has HTTP/2 prioritisation issues Akamai, Cloudflare & Fastly seem to be the only CDNs that are seriously investing in their infrastructure and their platform — all use custom edge server software (yes some of it forked from open source), have built in image optimisation services, have ability to run workloads on the edge etc. Then there's the peering arrangements that have to be negotiated (and paid for if you're not pushing significant traffic)