diff --git a/website/index.html b/website/index.html
index 4a9b343091..42428750a8 100644
--- a/website/index.html
+++ b/website/index.html
@@ -6710,7 +6710,7 @@ <h5>contact</h5>
     const meta = document.querySelector('meta[name="iii:mailmodo-form-url"]');
     return meta && meta.getAttribute('content') ? meta.getAttribute('content').trim() : '';
   }
-  async function submitToMailmodo(email){
+  async function submitToMailmodo(email, formLocation){
     const url = getMailmodoFormUrl();
     if (!url) return;
     try {
@@ -6722,6 +6722,7 @@ <h5>contact</h5>
       // Mailmodo returns 409 for already-subscribed; treat as success.
       if (!res.ok && res.status !== 409) throw new Error('mailmodo submission failed');
       if (typeof window.iiiNotifyCommonRoomEmail === 'function') window.iiiNotifyCommonRoomEmail(email);
+      if (typeof window.iiiNotifyPostHogEmailSubmit === 'function') window.iiiNotifyPostHogEmailSubmit(email, formLocation);
     } catch (_) {
       // Swallow — we still mark the form submitted so users aren't blocked.
     }
@@ -6750,7 +6751,7 @@ <h5>contact</h5>
       persistAccessRequest(v);
       emailForm.classList.add('submitted');
       emailInput.value = '';
-      submitToMailmodo(v);
+      submitToMailmodo(v, 'hero');
     });
   }
 
@@ -7104,7 +7105,7 @@ <h5>contact</h5>
       persistAccessRequest(v);
       form.classList.add('submitted');
       input.value = '';
-      submitToMailmodo(v);
+      submitToMailmodo(v, 'footer');
     });
   })();
 
diff --git a/website/posthog-consent.js b/website/posthog-consent.js
index ddc5f29848..c5c7937ab6 100644
--- a/website/posthog-consent.js
+++ b/website/posthog-consent.js
@@ -61,6 +61,36 @@
     });
   };
 
+  // Records a successful email-form submission in PostHog. We identify() the
+  // person by their email (the cross-system key Common Room also de-anonymizes
+  // on), which creates the PostHog person profile under
+  // person_profiles: 'identified_only'. Where Common Room's signals-sdk-user-id
+  // cookie is already present we attach its visitor id too, so the two systems
+  // can be joined per visitor; if it isn't set yet we just record without it.
+  function iiiReadCommonRoomId() {
+    var match = document.cookie.match(/(?:^|;\s*)signals-sdk-user-id=([^;]+)/);
+    return match ? decodeURIComponent(match[1]) : null;
+  }
+
+  window.iiiNotifyPostHogEmailSubmit = function (email, formLocation) {
+    try {
+      if (localStorage.getItem(STORAGE_KEY) !== 'accepted') return;
+      if (!window.posthog || typeof window.posthog.capture !== 'function') return;
+      var crId = iiiReadCommonRoomId();
+      var distinctId = email || crId;
+      if (distinctId) {
+        var personProps = {};
+        if (email) personProps.email = email;
+        if (crId) personProps.common_room_user_id = crId;
+        window.posthog.identify(distinctId, personProps);
+      }
+      var props = { form_location: formLocation || 'unknown' };
+      if (email) props.email = email;
+      if (crId) props.common_room_user_id = crId;
+      window.posthog.capture('website_email_submit', props);
+    } catch (_) {}
+  };
+
   try {
     if (localStorage.getItem(STORAGE_KEY) === 'accepted') window.iiiLoadPostHog();
   } catch (_) {}