AWS WAF - AWS WAF is a web application firewall that helps protect your web applications from common web exploits.
Sucuri - Website Protection, Malware Removal, and Blacklist Prevention
UptimeRobot - Free Website Uptime Monitoring
Amazon CloudFront - Amazon CloudFront is a content delivery web service.
Hyperping - Cheap uptime and performance monitoring with detailed reporting and flexible alerting
CloudFlare - Cloudflare is a global network designed to make everything you connect to the Internet secure, private, fast, and reliable.