SE Ranking - All-in-One cloud-based SEO software for agencies, marketing teams and webmasters
Platypus - Realtime server monitoring and reporting
DeskAlerts - Send alerts to any corporate device: PCs, phones, tablets, etc.
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.
SEMRush - All-in-one Marketing Toolkit for digital marketing professionals.
Nagios - Complete monitoring and alerting for servers, switches, applications, and services