What are some alternatives?
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.
Site24x7 - Site24x7 offers both free & paid website monitoring services. Monitor websites remotely and receive instant email/sms alerts if your website becomes unavailable. View uptime & performance graphs of your website monitors.
Pulseway - Pulseway changes the enterprise monitoring and management game with its mobile management solution.
AppDynamics - Get real-time insight from your apps using Application Performance Management—how they’re being used, how they’re performing, where they need help.
PagerDuty - Cloud based monitoring service
Zabbix - Track, record, alert and visualize performance and availability of IT resources