Core Web Vitals · Real data

Is your site fast for the people who matter?

Rumy monitors LCP, CLS, INP, FCP and TTFB with data from your real users — not a lab. Add 2 lines of code and start now.

Start for free Free forever · No credit card

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Real metrics

Data collected from your visitors. p75 per hour, no artificial sampling.

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Deploy impact

Mark deploys and see the before and after of each release in your metrics.

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Automatic alerts

Get an email when a metric degrades. Max 1 alert per metric every 24h.

Monitored metrics

We calculate the p75 — the value 75% of your users experience or better. This is Google's standard for evaluating real performance.

LCP

Largest Contentful Paint

≤ 2.5s

CLS

Cumulative Layout Shift

≤ 0.1

INP

Interaction to Next Paint

≤ 200ms

FCP

First Contentful Paint

≤ 1.8s

TTFB

Time to First Byte

≤ 800ms

Ready in 2 minutes

Create your account

Install the snippet

Paste 2 lines before </head>. No dependencies.

Monitor

See metrics arriving in real time on your dashboard.

Pricing

Start free. Scale when you need.

Free

Start in seconds

✓ 10,000 pageviews/month
✓ 7 days history
✓ 1 site
✓ All CWV metrics
✓ Deploy tracking & comparison
✗ No alerts

Start for free

Popular

Starter

$5/mo

Less than a coffee per month

✓ 100,000 pageviews/month
✓ 30 days history
✓ 1 site
✓ Performance alerts
✓ Deploy tracking & comparison

Subscribe Starter

Pro

$19/mo

Protect your performance and revenue

✓ 500,000+ pageviews/month
✓ 13 months history
✓ Multi-site
✓ Advanced alerts
✓ Deploy tracking & comparison

Subscribe Pro