PRTG is #10 in Top 10 IT Monitoring software
PRTG Network Monitor is an agentless network monitoring software. It can monitor and classify system conditions like bandwidth usage or uptime and collect statistics from miscellaneous hosts as switches, routers, servers and other devices and applications.
PRTG video
Positions in ratings
#10 in Top 10 IT Monitoring software
Alternatives
The best alternatives to PRTG are: Zabbix, SolarWinds, Nagios, Cacti, SpiceWorks, Splunk, ManageEngine