Real user monitoring

See performance through your users’ eyes.

Combine synthetic checks with real visitor data to find slow pages, layout shifts, and browser problems that only appear in the wild.

Start monitoring See pricing

real percentiles, not one average: p50 / p75 / p95; real percentiles, not one average
device-type breakdown: Desktop / mobile / tablet; device-type breakdown
server-side sampling keeps high-traffic sites affordable: sample_rate; server-side sampling keeps high-traffic sites affordable

LCP p752.1slargest contentful paint

FCP p75890msfirst contentful paint

CLS p750.04layout shift

How it works

Synthetic tells you where to look. RUM tells you who feels it.

Measure real visitors

Capture Core Web Vitals from the browsers and networks your customers actually use.

Find the slow segments

Slice performance by page, country, browser, device, and mobile experience.

Use meaningful percentiles

See p50, p75, and p95 performance so averages do not hide the long tail of poor experiences.

Alert on user impact

Set thresholds for LCP, FCP, TTFB, INP, CLS, load time, error rate, and bounce rate.

What makes it powerful

The long tail synthetic checks cannot see

A synthetic check measures one machine in one location; RUM measures the long tail of real devices and networks — which is where slow LCP and layout shift actually hurt conversions.