No-IP, Cloudflare, Infoblox, Cisco Umbrella, FreeDNS, Fly.io, PowerDNS, DNSimple, AWS Route 53, ClouDNS.net, Alviy, Constellix, NameCoin, Zoneedit, easyDNS, NS1, BitMitigate, DNS Made Easy, Gplugin, Hosted name, DNS.com, HostDNS, Zilore are some alternatives to Google Cloud DNS.