1.1.1.1, Blokada, AdGuard DNS, Control D, NextDNS, Cisco Umbrella, Google Public DNS, UncensoredDNS, NixNet DNS, NextDNS Manager, Yandex.DNS, Comodo Secure DNS, Quad9, OpenNIC, SafeDNS, BlahDNS, DNS.Watch, Stubby, DNSX3, SmartViper Public DNS are some alternatives to AhaDNS.