Stackify provides application performance monitoring (APM) tools including Retrace and Prefix for developers to monitor, trace, and resolve application issues.

Raygun is an application monitoring platform for web & mobile apps, offering Crash Reporting, RUM, and APM to help developers resolve end-user issues.

SignalFx (now part of Splunk) provides real-time observability, APM, and infrastructure monitoring for cloud-native environments like microservices and Kubernetes.

Datadog is an integrated platform for cloud monitoring, observability, and security, used by DevOps, IT operations, and security teams.