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.
Loupe - Loupe is an application performance management platform that enables users to monitor, find, and fix errors when they appear in the applications.
Prometheus - An open-source systems monitoring and alerting toolkit.
logit.io - Logit.io provides complete observability of logs, metrics and traces. The platform also offers alerting & monitoring, as well as Prometheus, OpenSearch & Grafana. Ingest any type of data to see real-time insights about your applications and services
Nagios - Complete monitoring and alerting for servers, switches, applications, and services
CXGuardian - CXGuardian is a platform powered by QualityKiosk Technologies and allows users to monitor their mobile and web-based applications’ performance.