PagerDuty - Cloud based monitoring service

Blumira - Blumira's threat detection platform offers both automated threat detection and response, enabling organizations of any size to more efficiently defend against cybersecurity threats in near real-time.

VictorOps - We make on-call suck less & help teams to solve problems faster.

Google StackDriver - Stackdriver provides monitoring services for cloud-powered applications.

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.

Devo - Devo delivers real-time operational & business value from analytics on streaming and historical data to operations.