diff --git a/frontend/middleware.ts b/frontend/middleware.ts
new file mode 100644
index 0000000..038f5fd
--- /dev/null
+++ b/frontend/middleware.ts
@@ -0,0 +1,35 @@
+import { NextRequest, NextResponse } from "next/server";
+
+const protectedRoutes = [
+  "/dashboard",
+  "/projects",
+  "/workspace",
+  "/chat",
+  "/insights",
+];
+
+export function middleware(req: NextRequest) {
+  const token =
+    req.cookies.get("sb-access-token")?.value ||
+    req.headers.get("authorization");
+
+  const isProtectedRoute = protectedRoutes.some((route) =>
+    req.nextUrl.pathname.startsWith(route)
+  );
+
+  if (isProtectedRoute && !token) {
+    return NextResponse.redirect(new URL("/login", req.url));
+  }
+
+  return NextResponse.next();
+}
+
+export const config = {
+  matcher: [
+    "/dashboard/:path*",
+    "/projects/:path*",
+    "/workspace/:path*",
+    "/chat/:path*",
+    "/insights/:path*",
+  ],
+};
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