iThemes Security - Security plugin that provides over 30+ ways to secure and protect your WordPress site.
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.
6Scan - 6Scan Security provides comprehensive enterprise-grade security with frequent site scans, powerful...
StatusCake - Website Uptime Monitoring & Alerts – Free Unlimited Downtime Monitoring
Shield Security - The most advanced and easy-to-use WordPress security plugin.
Better Uptime - We call you when your website goes down