diff --git a/package.json b/package.json
index daf4d0d..9f9fdb6 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "libredb-website",
-  "version": "1.5.0",
+  "version": "1.5.1",
   "private": true,
   "type": "module",
   "description": "libredb.org — marketing website for LibreDB Studio (Astro static + Outstatic CMS)",
diff --git a/src/data/platform.ts b/src/data/platform.ts
index 4d3435e..0ea406c 100644
--- a/src/data/platform.ts
+++ b/src/data/platform.ts
@@ -133,7 +133,7 @@ export const limits: { term: string; detail: string }[] = [
   {
     term: 'Licence key',
     detail:
-      'Every self-hosted install needs a licence key, and Platform does not start without one. The key sets the admin and user seats and the expiry.',
+      'Every self-hosted install needs a licence key, and Platform does not start without one. The key names your organization and the one domain Platform runs on, and sets the admin and user seats and the expiry.',
   },
   {
     term: 'Audit',
@@ -153,7 +153,7 @@ export const offer = {
   seats: '1 admin and 3 users',
   term: '12 months',
   headline: 'Join the waiting list',
-  lead: 'The licence for 1 admin and 3 users is free for 12 months — no card, nothing to buy. Need more seats? Those are paid, and we will send a price for the number you need. Tell us a little about your team and we will come back with a licence key and the installer.',
+  lead: 'The licence for 1 admin and 3 users is free for 12 months — no card, nothing to buy. Need more seats? Those are paid, and we will send a price for the number you need. Tell us your organization and the domain Platform will run on, and we will come back with a licence key and the installer.',
   choices: [
     { value: 'Free licence — 1 admin + 3 users', label: '1 admin + 3 users', note: 'Free for 12 months' },
     { value: 'Paid licence — more seats', label: 'More than that', note: 'Paid — we send a price' },
diff --git a/src/pages/platform.astro b/src/pages/platform.astro
index c8a23c6..bff84be 100644
--- a/src/pages/platform.astro
+++ b/src/pages/platform.astro
@@ -186,13 +186,38 @@ const mailto = `mailto:${contact.email}?subject=${encodeURIComponent(contact.sub
               <input name="Email" type="email" autocomplete="email" required />
             </label>
             <label class="wl__field">
-              <span>Company <em aria-hidden="true">*</em></span>
-              <input name="Company" type="text" autocomplete="organization" required />
+              <span>Organization, as on the license <em aria-hidden="true">*</em></span>
+              <input name="Organization" type="text" autocomplete="organization" required />
             </label>
             <label class="wl__field">
               <span>Your role</span>
               <input name="Role" type="text" autocomplete="organization-title" placeholder="e.g. Head of Data" />
             </label>
+            <!-- A license is issued for one domain: the host of Platform's own
+                 URL, which Platform compares with AUTH_URL as it starts. A domain
+                 name only — no scheme, no port, no IP address. -->
+            <div class="wl__field wl__field--wide">
+              <label for="wl-domain">Platform domain <em aria-hidden="true">*</em></label>
+              <input
+                id="wl-domain"
+                name="Platform domain"
+                type="text"
+                inputmode="url"
+                autocapitalize="none"
+                spellcheck="false"
+                placeholder="libredb-platform.example.com"
+                pattern="([A-Za-z0-9]([A-Za-z0-9\-]{0,61}[A-Za-z0-9])?\.)+[A-Za-z]{2,63}"
+                maxlength="253"
+                title="A domain name such as libredb-platform.example.com, without https:// or a port"
+                aria-describedby="wl-domain-hint"
+                required
+              />
+              <p class="wl__hint" id="wl-domain-hint">
+                The address people will open Platform at. The license runs on this one domain, so give the name you will
+                set as <code>endpoints.hosts.platform</code> in the installer's <code>libredb.yaml</code>. A domain name
+                only: no https://, no port, no IP address.
+              </p>
+            </div>
             <label class="wl__field wl__field--wide">
               <span>Databases you would connect</span>
               <input name="Databases" type="text" placeholder="e.g. PostgreSQL, Oracle, MongoDB" />
@@ -482,6 +507,15 @@ const mailto = `mailto:${contact.email}?subject=${encodeURIComponent(contact.sub
     font-style: normal;
     color: var(--text-tertiary);
   }
+  .wl__hint {
+    font: var(--weight-regular) var(--body-xs-size) / 1.6 var(--font-ui);
+    color: var(--text-secondary);
+    text-wrap: pretty;
+  }
+  .wl__hint code {
+    font: var(--weight-regular) 0.95em / 1 var(--font-mono);
+    color: var(--text-primary);
+  }
   .wl__field input,
   .wl__field textarea {
     width: 100%;
diff --git a/src/scripts/waitlist.ts b/src/scripts/waitlist.ts
index d92aef8..b31b5e9 100644
--- a/src/scripts/waitlist.ts
+++ b/src/scripts/waitlist.ts
@@ -16,10 +16,15 @@ for (const form of document.querySelectorAll<HTMLFormElement>('[data-waitlist]')
   form.addEventListener('submit', (event) => {
     event.preventDefault();
     const lines = ['Hello LibreDB team,', '', 'I would like to join the LibreDB Platform waiting list.', ''];
-    for (const [name, value] of new FormData(form)) {
-      const text = String(value).trim();
-      if (text) lines.push(`${name}: ${text}`);
-    }
+    // What the license is issued from goes first, so whoever issues it reads
+    // the licence choice, the organization and the domain without scrolling.
+    const fields = [...new FormData(form)]
+      .map(([name, value]) => [name, String(value).trim()] as const)
+      .filter(([, text]) => text)
+      .map(([name, text]) => [name, name === 'Platform domain' ? text.toLowerCase() : text] as const);
+    const first = ['Licence', 'Organization', 'Platform domain'];
+    fields.sort(([a], [b]) => (first.indexOf(a) + 1 || 99) - (first.indexOf(b) + 1 || 99));
+    for (const [name, text] of fields) lines.push(`${name}: ${text}`);
     message = lines.join('\n');
     window.location.href = `mailto:${to}?subject=${encodeURIComponent(subject)}&body=${encodeURIComponent(message)}`;
     if (status) status.hidden = false;