DialMyCalls - The easy to use mass and emergency notification platform. Send a phone call, text message or e-mail to your entire list of people in seconds.
PagerDuty - Cloud based monitoring service
Call-Em-All - Call or send messages to friends and family members as well as other people who are online. The app allows you to create a message and send it out to multiple devices and pages.
VictorOps - We make on-call suck less & help teams to solve problems faster.
InformaCast - InformaCast is a leading mass notification software solution that helps organizations reach everyone with critical information.
xMatters - xMatters transforms event data into intelligent communication IT teams, avoiding outages and disruptions