Barracuda Web Application Firewall - Barracuda Web Application Firewall offers security and DDoS protection against automated & targeted attacks.
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.
AWS WAF - AWS WAF is a web application firewall that helps protect your web applications from common web exploits.
Cisco Umbrella - Cisco Umbrella is a cloud security platform that provides the first line of defense against threats on the internet.
ModSecurity - ModSecurity is an Open Source web application firewall developed by Trustwave's SpiderLabs.
OpenDNS Umbrella - Cloud Security