You are mostly listing CDNs and/or DNS services. None of which are "competitors" to what Cloudflare is offering.
Akamai and Incapsula are the only real competitors and, tbh, none of them are particularly "good" which is why CloudFlare has been so successful.
Sucuri is fine for a corporate blog or the like but it just really isn't usable for a high traffic site with alot of dynamic content.