Keymetrics vs Middleware
Keymetrics
pm2.io
Middleware
middleware.ioSide by side
| Figure | Keymetrics | Middleware |
|---|---|---|
| Price from | $79/mo | $0.30/mo |
| Free plan | Yes | Yes |
| Free trial | Yes | Yes |
| Open source | — | — |
| Web | Yes | Yes |
| Windows | — | Yes |
| macOS | — | Yes |
| Linux | Yes | Yes |
| iOS | — | Yes |
| Android | — | Yes |
| API | Yes | Yes |
| Self-hosted | Yes | — |
| Plans published | 3 | 3 |
| Spec score · Application Performance Monitoring | 8.1 (#17) | 9.0 (#3) |
| Integrations | PM2 Plus notifications can be sent by email, Slack, or webhook. | Documented integrations include AWS, Azure, Google Cloud, Vercel, databases, Datadog, Grafana, Prometheus, Logstash, Fluentd and the OpenTelemetry Collector. |
| Support | The maker provides a contact form for sales and general inquiries and lists separate support and technical contact addresses in its terms. | Free users receive community support, pay-as-you-go customers get a dedicated Slack or Teams channel, and custom-contract customers receive an account team and 24x7 support. |
Plans
In their own words
Keymetrics
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.
Middleware
Middleware is a hybrid observability platform for detecting and resolving issues across infrastructure, application performance, and real-user monitoring. Its listed coverage includes infrastructure monitoring, logs, metrics, distributed tracing, database monitoring, synthetic monitoring, browser testing, and LLM observability. The AI SRE Agent and OpsAI capabilities include root cause analysis, automatic issue detection, faster issue solving, and automatic PR generation. The Free Forever plan costs nothing and includes up to 100GB of data, 1k RUM sessions, 20k synthetic checks, 10 browser test runs, and 2 million OpsAI tokens, with 14-day retention and community support. Pay As You Go costs $0.30 a month, billed according to use, with default 30-day retention. Middleware lists 450+ integrations and a Public API. It runs on Android, iOS, Linux, macOS, web, Windows, and API. The company says it encrypts customer data in transit and at rest using TLS 1.2+ and AES-256.