PagerDuty - Cloud based monitoring service
Goliath Performance Monitor - Goliath Performance Monitor is proactive, end-to-end IT performance monitoring for Citrix & VMware to ensure a positive end user experience. Try it free!
VictorOps - We make on-call suck less & help teams to solve problems faster.
Server Density - Trusted monitoring built by experts.
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.
Observium - Observium