Nagios vs NETSCOUT

Nagios, an open-source computer-software application, monitors systems, networks and infrastructure. Nagios offers monitoring and alerting services for servers, switches, applications and services. It alerts users when things go wrong and alerts them a second time when the problem has been resolved. Ethan Galstad and a group of developers originally wrote Nagios as NetSaint. As of 2015 "Agios" also transliterates the Greek word, which means "saint".

NETSCOUT Systems, Inc. is a provider of integrated computer network performance management products. NETSCOUT products include packet Sniffer and nGenius packet flow recorder. It is headquartered in Westford, Massachusetts and has approximately 800 employees. NETSCOUT serves the enterprise community, government agencies and telecommunications service providers. At various times NETSCOUT acquired the companies Network General and Fidelia Technology.