YouMonitWeb speed monitoring — Core Web Vitals + real-user timing.
Two complementary approaches: synthetic PageSpeed Insights runs on schedule, plus a one-line RUM snippet that captures load times from real visitors' browsers.
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Synthetic + real users — the full performance picture
Synthetic catches regressions before deploy; RUM tells you what real people on real networks experience.
PageSpeed Insights on schedule
Automated Lighthouse runs — score, LCP, INP, CLS, TBT. Alert on drop below your threshold.
Real user monitoring (RUM)
One-line JS snippet — no cookies, no PII. Captures every real visitor's load time, segmented by country + device.
p95 regression alerts
Alert when the slowest 5% get slower. Averages hide the users who actually leave.
Per-region breakdown
See exactly which country is fast and which is on-fire. Common cause: origin server + no CDN in that region.
Mobile / desktop split
Separate baselines. A great desktop score can hide brutal mobile performance.
Weekly digest
Slack + email report every Monday: top 5 slowest pages, week-over-week changes, biggest regressions.
Alerts anywhere your team lives
Route per monitor, per severity — production pages the on-call rota, marketing sites drop into a Slack channel.
Slow sites lose customers before they even see the content.
Add a RUM snippet + PageSpeed monitor in 2 minutes. Free forever for small sites.
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