Zabbix - Track, record, alert and visualize performance and availability of IT resources
Firebase - Firebase is a cloud service designed to power real-time, collaborative applications for mobile and web.
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.
Parse - Build applications faster with object and file storage, user authentication, push notifications, dashboard and more out of the box.
Nagios - Complete monitoring and alerting for servers, switches, applications, and services
AnyPresence - AnyPresence is an Enterprise Backend as a Service for mobile app development and API augmentation.