What are some alternatives?
When comparing Atop and Netdata, you can also consider the following products
htop - htop - an interactive process viewer for Unix. This is htop, an interactive process viewer for Unix systems. It is a text-mode application (for console or X terminals) and requires ncurses. Latest release: htop 2.
Zabbix - Track, record, alert and visualize performance and availability of IT resources
glances system monitoring - Glances is a cross-platform system monitoring tool written in Python. Written in Python, Glances will run on almost any plaftorm : GNU/Linux, FreeBSD, OS X and Windows.
Nagios - Complete monitoring and alerting for servers, switches, applications, and services
Stacer - Ubuntu system optimizer
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.