See exactly how real users experience your site. Collect Web Vitals, track JavaScript errors, analyze sessions, and monitor performance from 100% of your real traffic — not synthetic tests.
1,000 free sessions/month • No credit card required • Setup in 2 minutes
Track LCP, FCP, CLS, INP, and TTFB from every real user visit. See how performance varies by page, browser, device, and geography. Know exactly when a deploy degrades experience.
Every JavaScript error caught automatically with full stack traces. Errors are de-obfuscated via source maps, grouped by fingerprint, and linked to the session where they occurred.
Search and filter sessions by URL, error, country, browser, or any custom attribute. See the complete timeline of every session — page views, clicks, navigations, and errors in context.
Track XHR/fetch request timing, image and script load performance, and resource waterfall data. Identify slow API calls and heavy assets that drag down your page speed.
Automatic click and navigation tracking. Detect rage clicks and frustration signals. Understand how users actually interact with your application — not how you think they do.
Set thresholds on any Web Vital and get notified via Slack, email, or webhook when performance degrades. Catch regressions before your users notice them.
Add a single script tag to your site or install our npm package. Data starts flowing immediately — no configuration, no build steps, no agents to deploy. Your first Web Vitals report is ready before your coffee gets cold.
Observe shows you the forest. Analyze lets you examine the trees.
Aggregate metrics from 100% of your traffic. Always-on visibility into performance and user experience.
From $0.12 / 1K sessions
Full session detail for the sessions that matter. Triggered by server-side filter rules — no app changes required.
From $2.50 / 1K sessions
One script tag. 1,000 free sessions. Full Web Vitals, error tracking, and session analytics — no credit card required.