Amazon Route 53 - Amazon Route 53 is a highly available and scalable DNS web service.
Cisco Umbrella - Cisco Umbrella is a cloud security platform that provides the first line of defense against threats on the internet.
DNSimple - Domain Name Service with low cost hosted DNS, an easy to use web interface, and a REST API for automation. Hosting DNS has never been so simple.
WebTitan - WebTitan is an advanced DNS based web content filter and web security layer that blocks malware, ransomware and phishing attempts as well as providing web content control. Cloud and gateway versions available.
GoDaddy DNS - GoDaddy DNS helps manage website performance, reliability and security.
DNSFilter - DNSFilter offers DNS-Based Content Filtering & Threat Protection.