What are some alternatives?
Derdack Enterprise Alert - EnterpriseAlert is an on premise software and provides alert notifications with escalations, duty scheduling & anywhere incident remediation
PagerDuty - Cloud based monitoring service
OpsGenie - Alerting and On-Call Management for Dev&Ops Teams
One Call Now - One Call Now's message notification delivers automated phone calls, SMS text messages and emails within moments to any group.
VictorOps - We make on-call suck less & help teams to solve problems faster.
PagerTree - On-Call. Simplified. Intelligent alert routing for the modern team.