NIXStats - SaaS monitoring tool for window/linux servers and websites. Think up-time robot but with more features.
Dell Technologies APEX - Dell Technologies APEX is a platform that delivers excellent cloud experiences to major businesses in the world.
Network Server Suite - Network Server Suite is a network server monitoring software for Windows, Linux, or AIX that manage all of network servers, services, applications, and devices from a single, mobile-ready console.
Cruz RMM - Cruz RMM is an ideal solution for Managed IT service providers on the lookout for a remote management product to mechanize and track the operations of their user base.
mackerel.io - mackerel.io is a server and application performance monitoring platform.
LogicMonitor - LogicMonitor is the SaaS performance monitoring platform for the world's best IT teams. Deploy Fast, Monitor More, Improve Ops.