For most purposes, Cloudflare is a DNS provider and CDN. There is no lack of other providers for these services, most of which would be happy to onboard another

For most purposes, Cloudflare is a DNS provider and CDN. There is no lack of other providers for these services, most of which would be happy to onboard another paying customer. Unless you've structured your startup around Cloudflare's workers, I would expect ready pluggability.