Fair point. Maybe Fastly is more akin to Akamai given it seems to be more enterprise-y. By market cap, Cloudflare is 26 billion, Akamai is 18, and Fastly is 6.

Fastly's free offering gives you "$50 worth of traffic" whereas Cloudflare has a perpetually free option. And for Akamai you have to apply for a free trial.

This is market cap, but if you look at amount of traffic you have Akamai estimated at 15-30%, CF at 10%.

So if it would go down, it would cripple vast amount of internet.

Akamai is balls deep in video streaming, which is probably the most bandwidth/traffic intense thing for a CDN to dabble with. My guess is that CF has much more diverse traffic. Hence the fallout from an interruption would be quite different.

Not quite, Akamai is more large corp centric (they don't serve average Joe) besides that they do also security. If it went down you would get all of sudden e.g. a lot of DDOS possible.