See which AI sent the visitor.

Install it in one line

Paste this before </body> on every page. It is about 1 KB, loads async, and never blocks rendering.

<script async src="https://grow.contact/api/public/ai-attribution.js"></script>

Where the data lands

• Google Tag Manager — pushes event: "ai_referral" to dataLayer.
• GA4 — fires gtag("event", "ai_referral", …) when gtag is present.
• Plausible, PostHog, Fathom — a custom event with the engine as a property.
• Anything else — read window.growAttribution or listen for the event below.

window.addEventListener("grow:attribution", (e) => {
  // e.detail = { isAi, source, label, referrer, utm_source, landing_page, first_touch }
  if (e.detail.isAi) console.log("AI referral from", e.detail.label);
});

Engines we detect (12)

Missing an engine? Tell us and we'll add it — the list is served from one endpoint, so every site using the script picks it up automatically.

Privacy, plainly

Classification is pure client-side string matching against document.referrer and utm_source. No cookies, no fingerprinting, no request back to grow.contact after the script loads. First-touch engine is stored in the visitor's own localStorage so you can attribute a later conversion to the AI that started it. MIT licensed — read or fork the source.