What are some alternatives?
Cyberark - Security for the Heart of the Enterprise
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.
netdata - Real-time performance monitoring, done right
LogicMonitor - LogicMonitor is the SaaS performance monitoring platform for the world's best IT teams. Deploy Fast, Monitor More, Improve Ops.
Foxpass - Foxpass manages users, groups, and SSH keys (plus a LDAP and RADIUS interfaces) to increase an organization's server and network security.
Nagios - Complete monitoring and alerting for servers, switches, applications, and services