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.