diff --git a/contact.html b/contact.html
index f029621..bc567be 100644
--- a/contact.html
+++ b/contact.html
@@ -280,6 +280,7 @@
     </div>
   </footer>
 
+  <script src="https://cdn.jsdelivr.net/npm/@emailjs/browser@4/dist/email.min.js"></script>
   <script src="js/translations.js"></script>
   <script src="js/main.js"></script>
   <script src="js/form-handler.js"></script>
diff --git a/js/form-handler.js b/js/form-handler.js
index 9e59354..8d41d43 100644
--- a/js/form-handler.js
+++ b/js/form-handler.js
@@ -8,6 +8,16 @@ const HUBSPOT_PORTAL_ID = '148163754';
 const HUBSPOT_FORM_GUID = '1d9b75c9-8b60-4966-aa18-4bf503452e9a';
 const FORMSPREE_ID = 'mojrvokp';
 
+// ── EMAILJS (email de bienvenue au client) ────────────────────────────────────
+const EMAILJS_PUBLIC_KEY  = '8KUlaQ7BDVlbkZRyP';
+const EMAILJS_SERVICE_ID  = 'service_o1yv09o';
+const EMAILJS_TEMPLATE_ID = 'yx7jdwi';
+
+// Initialisation EmailJS (une seule fois au chargement)
+if (typeof emailjs !== 'undefined') {
+  emailjs.init({ publicKey: EMAILJS_PUBLIC_KEY });
+}
+
 // ── PROXY CLOUDFLARE WORKER ───────────────────────────────────────────────────
 // URL du Worker qui proxifie l'API HubSpot CRM (contourne le CORS).
 // Après déploiement du Worker (voir cloudflare-worker/hubspot-proxy.js),
@@ -94,7 +104,7 @@ function setupContactForm(form) {
     setLoading(false);
 
     if (hubspotOk || formspreeOk) {
-      showSuccess(refNumber);
+      showSuccess(refNumber, data);
     } else {
       showError();
     }
@@ -248,7 +258,7 @@ function setLoading(isLoading) {
   form?.classList.toggle('form-loading', isLoading);
 }
 
-function showSuccess(refNumber) {
+function showSuccess(refNumber, clientData) {
   const successEl  = document.getElementById('formSuccess');
   const form       = document.getElementById('contactForm');
   const refDisplay = document.getElementById('refNumberDisplay');
@@ -258,6 +268,24 @@ function showSuccess(refNumber) {
     successEl.scrollIntoView({ behavior: 'smooth', block: 'center' });
   }
   if (form) form.style.display = 'none';
+
+  // Envoi de l'email de bienvenue au client (sans bloquer l'affichage)
+  if (clientData) sendWelcomeEmail(clientData);
+}
+
+// ── EMAIL DE BIENVENUE ────────────────────────────────────────────────────────
+async function sendWelcomeEmail(data) {
+  if (typeof emailjs === 'undefined') return;
+  try {
+    await emailjs.send(EMAILJS_SERVICE_ID, EMAILJS_TEMPLATE_ID, {
+      firstname:        data.firstname,
+      email:            data.email,
+      reference_client: data.reference_client,
+    });
+  } catch (err) {
+    // L'email de bienvenue est un bonus — on ne bloque pas l'inscription si ça échoue
+    console.warn('EmailJS welcome email failed:', err);
+  }
 }
 
 // Affiche le message "déjà client" — ne modifie AUCUNE donnée HubSpot