Keymetrics

What Keymetrics is

Keymetrics develops monitoring for Node.js server infrastructure around the open source PM2 process manager. PM2 Plus provides a web interface for production monitoring, with issue and exception tracking, deployment reporting, real-time logs, custom metrics and actions, and notifications by email, Slack, or webhook. Its views bring applications and databases together in real time or across history, and can show an aggregate picture across applications. When an error occurs, the issue dashboard can show its time, affected servers, stack trace, code line, and logs from before the error. Node.js applications can publish values, counters, meters, and histograms through the @pm2/io library. PM2 Enterprise is aimed at high-scale or critical Node.js services. It adds configurable dashboards, threshold-based alerts, stored logs, and CPU and memory profiling that can be launched in production. Enterprise is offered as an installable on-premise system or through dedicated or managed instances. Runtime is listed as free at 0.00 USD and includes the process manager, zero-downtime reloads, terminal monitoring, and a real-time web interface. Plus is listed at $79 a month, with process limits; the pricing note says from $39/mo. Keymetrics lists API, Linux, self-hosted, and web platforms, with a hybrid deployment model.

Who it suits

Keymetrics suits teams running Node.js services that want to monitor applications and databases, investigate errors, and review deployment activity. PM2 Enterprise is directed at high-scale or critical services that need configurable alerts, retained logs, or production profiling.

Limits

Runtime is free and includes the process manager, zero-downtime reloads, terminal monitoring, and a real-time web interface. Plus applies process limits across linked servers; processes above a plan's limit are automatically ignored. The pricing note mentions a 14-day trial, while the pricing page says a trial is possible by contacting sales without stating its duration.

Getting started

1. Visit https://pm2.io/.
2. Contact the maker for Enterprise details.
3. Runtime includes the open source PM2 process manager, zero-downtime reloads, terminal monitoring, and a real-time web interface; Plus and Enterprise list paid features.
4. A trial is possible by contacting the sales team.
5. Choose an Enterprise deployment as an installable on-premise system or as a dedicated or managed instance.

Verdict

Choose Keymetrics for Node.js infrastructure monitoring built around PM2, especially if issue investigation, custom metrics, or Enterprise profiling match your needs. Processes above a Plus plan limit are ignored; contact the maker for Enterprise pricing details.