Azure Application Insights vs Keymetrics

Azure Application Insights is an Azure Monitor service for collecting and analyzing application telemetry. It combines alerts, metrics, logs, workbooks, Grafana dashboards, and investigation tools such as application maps, live metrics, transaction search, availability monitoring, failure analysis, and performance views. Usage analytics cover users, sessions, events, funnels, flows, and cohorts. For.NET applications, diagnostics include profiling and a snapshot debugger for exceptions. Microsoft recommends the Azure Monitor OpenTelemetry Distro for most code-based server-side scenarios; browser telemetry uses the Application Insights JavaScript SDK. Setup paths cover web apps, virtual machines, JavaScript apps, Azure Functions, Kubernetes, and AI agents. Telemetry is stored in a Log Analytics workspace, and the service can work with applications hosted outside Azure. A daily ingestion cap can stop excess collection until the next UTC day, while sampling can reduce volume. The pricing page lists 90 days of no-charge retention, with longer retention charged by retained data volume. Ingestion is usage-based, with the first 5 GB per month per billing account free.

Keymetrics develops Node.js monitoring software around the open-source PM2 process manager. PM2 Plus provides a real-time web interface for production monitoring, including issue and exception tracking, deployment reporting, real-time logs, custom metrics, custom actions, and notifications through email, Slack, or webhooks. Applications and databases can be viewed together in real time or historically, with an aggregate view across applications. Its issue dashboard can identify when an error occurred, affected servers, the stack trace, the relevant code line, and logs from before the error. The @pm2/io library lets Node.js applications expose values, counters, meters, and histograms. PM2 Enterprise targets high-scale or critical Node.js services, adding customizable dashboards, threshold alerts, stored logs, and production CPU and memory profiling. Enterprise can run as an on-premise installation or as a dedicated or managed instance. Runtime is free; Plus is listed at $79 a month, and Enterprise pricing requires contact. Keymetrics supports API, Linux, self-hosted, and web deployments.