diff --git a/router/index.ts b/router/index.ts
index 7d97541a..a40066b5 100644
--- a/router/index.ts
+++ b/router/index.ts
@@ -712,7 +712,11 @@ const router = {
       url.searchParams.forEach((value, key) => {
         redirectUrl.searchParams.append(key, value);
       });
-      return Response.redirect(redirectUrl.toString(), 302);
+      // Never cache: a cached 302 would pin a visitor to one /founder calendar.
+      return new Response(null, {
+        status: 302,
+        headers: { Location: redirectUrl.toString(), "Cache-Control": "no-store" },
+      });
     }
 
     const agentChatCloudPath = getAgentChatCloudPath(
diff --git a/router/test/vanity-redirects.test.ts b/router/test/vanity-redirects.test.ts
index 831eafd4..f405c829 100644
--- a/router/test/vanity-redirects.test.ts
+++ b/router/test/vanity-redirects.test.ts
@@ -35,6 +35,7 @@ describe("router vanity redirects", () => {
 
     expect(response.status).toBe(302);
     expect(response.headers.get("location")).toBe(`${destination}?utm_source=test`);
+    expect(response.headers.get("cache-control")).toBe("no-store");
     expect(cloudWebWorker.fetch).not.toHaveBeenCalled();
   });