PerfDrift
Sign in

We watch your page speed. You hear from us when it breaks.

Paste a URL. We run real Lighthouse checks on a schedule, chart the trend, and email you only when a genuine regression happens — not on ordinary noise.

Get started free

We don't cry wolf

Lighthouse scores are noisy by nature — the same page can score 78 one day and 85 the next. PerfDrift uses a rolling median baseline and requires two consecutive breaches before it emails you, so a bad CDN blip doesn't turn into a false alarm.

Your inbox is the dashboard

You shouldn't have to remember to check a graph. We check daily and email you only when something real changed — score, delta, and the likely cause, right in the message.

"That deploy broke it", not just "it broke"

Post a one-line deploy annotation from your CI and it shows up as a marker on the chart — turning a mysterious regression into an obvious cause.

Zero-friction setup

Paste a URL, see your first real Lighthouse score in about 20 seconds. No verification step, no dashboard tour, no config to write before you get value.

Simple pricing

Free

$0
  • • 1 site
  • • Mobile checks, daily
  • • Email alerts
  • • 30-day history

Pro

$9/mo
  • • Up to 10 sites
  • • Mobile + desktop, 3x/day median
  • • Email + Slack alerts
  • • 365-day history
  • • Deploy annotations, CSV export, public share page
Get started free

Know a team that keeps shipping regressions?

The fastest way to help someone is to send them their own site's score — Pro's public share page turns any monitored site into a link worth sharing.

Share on XShare on LinkedIn