MullvadDNS is described as 'Our public encrypted DNS service uses DNS over HTTPS (DoH) and DNS over TLS (DoT). This protects your DNS queries from being snooped on by third parties when not connected to our VPN service as your DNS queries are encrypted between your device and our DNS server' and is a DNS Resolver in the security & privacy category. There are more than 50 alternatives to MullvadDNS, not only websites but also apps for a variety of platforms, including Windows, Linux, Mac and Android apps. The best MullvadDNS alternative is NextDNS, which is both free and Open Source. Other great sites and apps similar to MullvadDNS are 1.1.1.1, DNS4EU, AdGuard DNS and Control D.