What are some alternatives?
Nagios - Complete monitoring and alerting for servers, switches, applications, and services
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.
LogicMonitor - LogicMonitor is the SaaS performance monitoring platform for the world's best IT teams. Deploy Fast, Monitor More, Improve Ops.
Sensu - Monitor servers, services, application health, and business KPIs. Get notified about failures before your users do. Collect and analyze custom metrics. Give your business the competitive advantage it deserves.
Munin - PnP networked resource monitoring tool that can help to answer the what just happened to kill our performance
Sumo Logic - Sumo Logic is a secure, purpose-built cloud-based machine data analytics service that leverages big data for real-time IT insights