CloudStats is described as 'Cloud based network monitoring software that allows you to monitor servers, virtual machines, cloud and websites'. There are more than 50 alternatives to CloudStats, not only websites but also apps for a variety of platforms, including Linux, Windows, Mac and Self-Hosted solutions. The best alternative is Zabbix, which is both free and Open Source. Other great sites and apps similar to CloudStats are Netdata (Free, Open Source), Nagios (Freemium, Open Source), Spiceworks (Free) and Datadog (Paid).
Gather and analyze accurate statistics and performance metrics, visualize it, get notified about current and potential issues without delay, and take advantage of our time-tested professional development and support.
Infrastructure-wide health monitoring & performance troubleshooting in one place. Collaborate in the same place as relevant data from your systems and applications, reducing mean time to acknowledge (MTTA), & mean time to resolution. (MTTR).
Datadog is a monitoring service for IT, Dev & Ops teams who write and run applications at scale, and want to turn the massive amounts of data produced by their apps, tools and services into a unified view of IT infrastructure. 120+ Integrations!.
PHP Server Monitor is a script that checks whether your websites and servers are up and running. It comes with a web based user interface where you can manage your services and websites, and you can manage users for each server with a mobile number and email address.
Munin is a networked resource monitoring tool that can help analyze resource trends and "what just happened to kill our performance?" problems. It is designed to be very plug and play. A default installation provides a lot of graphs with almost no work.