AppOptics Alternatives

Track, record, alert and visualize performance and availability of IT resources

Complete monitoring and alerting for servers, switches, applications, and services

Icinga is a fork of Nagios and is backward compatible.

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.

Real-time performance monitoring, done right

PnP networked resource monitoring tool that can help to answer the what just happened to kill our performance

A fully featured network monitoring system that provides a wealth of features and device support.

Monitor CPU, RAM... or output of any command and make API call on event, default is email messages.

Cacti is a complete network graphing solution. It provides a fast poller, advanced graph templating, multiple data acquisition methods, and user management features.

Splunk's operational intelligence platform helps unearth intelligent insights from machine data.

Nagios compatible monitoring framework, written in Python

Open-source monitoring and alerting system by Stack Exchange