Paessler PRTG

NetCrunch is commercial, self-hosted, agentless network and IT infrastructure monitoring software for Windows Server. It monitors network devices, servers, virtualization platforms, cloud services, applications, websites, logs, telemetry, and network traffic across on-premises and hybrid IT environments. Network traffic analysis supports NetFlow, sFlow, IPFIX, and other flow technologies. NetCrunch supports 680+ monitoring targets and provides 270+ ready-to-use Monitoring Packs for devices, applications, and operating systems. Licensing is based on monitored nodes and network interfaces rather than individual sensors, checks, or metrics. Real-time dashboards, policy-based monitoring, advanced alerting, and 40+ automated response actions—including remote script execution, service restart, process termination, and device reboot—support centralized monitoring and automated remediation. NetCrunch runs on Windows Server and can monitor infrastructure deployed on-premises, in the cloud, or across hybrid environments.

Statseeker is a fully-featured network performance monitoring solution. It's highly scalable and delivers fast real-time performance data from a minimal server footprint. Statseeker can be up and running within minutes, and discovering your entire network in less than an hour, without any significant effect on your bandwidth availability. Statseeker monitors networks of any size, polling up to one million interfaces every 60 seconds, collecting network data such as SNMP, ping, NetFlow (sFlow and J-Flow), syslog and trap messages and API data, as well as SDN configuration and health metrics. Your network performance data is never averaged or rolled up. This removes the guesswork in identifying over- and underutilized infrastructure, conducting root cause analysis, or capacity planning. Statseeker's out-of-the-box dashboards and reports give you the contextual data needed to proactively monitor your network and fix problems before users are aware.