What are some alternatives?
When comparing eZ Server Monitor and Zabbix, you can also consider the following products
PhpSysInfo - phpSysInfo is a customizable PHP script that displays information about your systems.
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.
RunDeck - RunDeck is an open source automation service with a web console, command line tools and a WebAPI.
LogicMonitor - LogicMonitor is the SaaS performance monitoring platform for the world's best IT teams. Deploy Fast, Monitor More, Improve Ops.
Monitor in a Box - Instantly usable, open source monitoring
Nagios - Complete monitoring and alerting for servers, switches, applications, and services