Zabbix - Track, record, alert and visualize performance and availability of IT resources
CloudFlare - Cloudflare is a global network designed to make everything you connect to the Internet secure, private, fast, and reliable.
Datadog - See metrics from all of your apps, tools & services in one place with Datadog's cloud monitoring as a service solution. Try it for free.
SiteLock - SiteLock software provides advanced website security, daily security scans, web app firewall with a CDN to deliver content more securely.
Prometheus - An open-source systems monitoring and alerting toolkit.
Amazon CloudFront - Amazon CloudFront is a content delivery web service.