Incapsula DDoS - Incapsula DDoS is a platform that comes with multiple DDoS protection options and mitigates attacks without incurring latency.
Pingdom - With website monitoring from Pingdom you will be the first to know when your website is down. No installation required. 30-day free trial.
NSFOCUS - NSFOCUS provides comprehensive, end-to-end protection from the debilitating effects of DDoS attacks.
StatusCake - Website Uptime Monitoring & Alerts – Free Unlimited Downtime Monitoring
StackPath Web Application Firewall - StackPath Web Application Firewall is a cloud-delivered security service that provides layered security for web applications that is based on the best practices of Enterprise Security.
Better Uptime - We call you when your website goes down