OnPage is described as 'The industry leading Secure Incident Management System with its unique ALERT-UNTIL-READ technology. Built around the incident resolution life-cycle, the platform enables organizations to automate the incident notification process' and is a Network Monitor in the network & admin category. There are more than 10 alternatives to OnPage for a variety of platforms, including Web-based, Android, iPhone, SaaS and iPad apps. The best OnPage alternative is Cabot, which is both free and Open Source. Other great apps like OnPage are TaskCall, PagerDuty, Squadcast and Zenduty.