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