diff --git a/ui/components/sidebar/navigation-mode-toggle.tsx b/ui/components/sidebar/navigation-mode-toggle.tsx
index 8983abdb0d..548c55dbef 100644
--- a/ui/components/sidebar/navigation-mode-toggle.tsx
+++ b/ui/components/sidebar/navigation-mode-toggle.tsx
@@ -19,10 +19,12 @@ export function SidebarNavigationModeToggle({
   isOpen,
   value,
   onChange,
+  chatEnabled = true,
 }: {
   isOpen: boolean;
   value: SidebarNavigationMode;
   onChange: (value: SidebarNavigationMode) => void;
+  chatEnabled?: boolean;
 }) {
   const router = useRouter();
   const modes = [
@@ -38,7 +40,8 @@ export function SidebarNavigationModeToggle({
     },
   ] as const;
 
-  const handleModeChange = (mode: SidebarNavigationMode) => {
+  const handleModeChange = (mode: SidebarNavigationMode, disabled: boolean) => {
+    if (disabled) return;
     onChange(mode);
     if (mode === SIDEBAR_NAVIGATION_MODE.CHAT) {
       router.push("/lighthouse");
@@ -56,11 +59,16 @@ export function SidebarNavigationModeToggle({
         {modes.map((mode) => {
           const Icon = mode.icon;
           const active = value === mode.value;
+          const disabled =
+            mode.value === SIDEBAR_NAVIGATION_MODE.CHAT && !chatEnabled;
           const button = (
             <button
               key={mode.value}
               type="button"
               aria-label={mode.label}
+              // aria-disabled (not disabled) keeps the button hoverable and
+              // focusable so the availability tooltip can fire.
+              aria-disabled={disabled || undefined}
               className={cn(
                 "flex h-8 items-center justify-center rounded-[6px] border px-2 text-sm transition-all duration-200 ease-out",
                 isOpen ? "min-w-0 gap-2" : "w-8",
@@ -70,22 +78,30 @@ export function SidebarNavigationModeToggle({
                   ? "border-border-input-primary bg-bg-neutral-primary text-text-neutral-primary shadow-md"
                   : "text-text-neutral-secondary hover:text-text-neutral-primary border-transparent",
                 isOpen && (active ? "flex-[11]" : "flex-[9]"),
+                disabled &&
+                  "hover:text-text-neutral-secondary cursor-not-allowed opacity-50",
               )}
-              onClick={() => handleModeChange(mode.value)}
+              onClick={() => handleModeChange(mode.value, disabled)}
             >
               <Icon className="size-4 shrink-0" />
               {isOpen && <span className="truncate">{mode.label}</span>}
             </button>
           );
 
-          if (isOpen) {
+          const tooltipContent = disabled
+            ? "Available in Prowler Cloud"
+            : !isOpen
+              ? mode.label
+              : null;
+
+          if (!tooltipContent) {
             return button;
           }
 
           return (
             <Tooltip key={mode.value} delayDuration={100}>
               <TooltipTrigger asChild>{button}</TooltipTrigger>
-              <TooltipContent side="right">{mode.label}</TooltipContent>
+              <TooltipContent side="right">{tooltipContent}</TooltipContent>
             </Tooltip>
           );
         })}
diff --git a/ui/components/ui/sidebar/menu.test.tsx b/ui/components/ui/sidebar/menu.test.tsx
index 62be707418..01cc4900b5 100644
--- a/ui/components/ui/sidebar/menu.test.tsx
+++ b/ui/components/ui/sidebar/menu.test.tsx
@@ -162,6 +162,19 @@ describe("Menu", () => {
     ).not.toBeInTheDocument();
     expect(screen.getByRole("button", { name: "Home" })).toBeInTheDocument();
   });
+
+  it("shows the mode toggle with Chat disabled outside cloud", () => {
+    pathnameValue.current = "/findings";
+    vi.stubEnv("NEXT_PUBLIC_IS_CLOUD_ENV", "false");
+
+    render(<MenuComponent isOpen />);
+
+    expect(screen.getByRole("button", { name: "Home" })).toBeInTheDocument();
+    expect(screen.getByRole("button", { name: "Chat" })).toHaveAttribute(
+      "aria-disabled",
+      "true",
+    );
+  });
 });
 
 describe("SidebarNavigationModeToggle", () => {
@@ -210,4 +223,34 @@ describe("SidebarNavigationModeToggle", () => {
     expect(onChange).toHaveBeenCalledWith(SIDEBAR_NAVIGATION_MODE.BROWSE);
     expect(pushMock).not.toHaveBeenCalled();
   });
+
+  it("blocks Chat and shows the cloud tooltip when chat is unavailable", async () => {
+    // Given
+    const user = userEvent.setup();
+    const onChange = vi.fn();
+
+    render(
+      <SidebarNavigationModeToggleComponent
+        isOpen
+        value={SIDEBAR_NAVIGATION_MODE.BROWSE}
+        onChange={onChange}
+        chatEnabled={false}
+      />,
+    );
+
+    // When
+    const chatButton = screen.getByRole("button", { name: "Chat" });
+    await user.hover(chatButton);
+
+    // Then
+    const tooltip = await screen.findByRole("tooltip");
+    expect(tooltip).toHaveTextContent("Available in Prowler Cloud");
+
+    // When
+    await user.click(chatButton);
+
+    // Then
+    expect(onChange).not.toHaveBeenCalled();
+    expect(pushMock).not.toHaveBeenCalled();
+  });
 });
diff --git a/ui/components/ui/sidebar/menu.tsx b/ui/components/ui/sidebar/menu.tsx
index 454e0932a2..76ae3e2765 100644
--- a/ui/components/ui/sidebar/menu.tsx
+++ b/ui/components/ui/sidebar/menu.tsx
@@ -116,13 +116,12 @@ export const Menu = ({ isOpen }: { isOpen: boolean }) => {
         </Tooltip>
       </div>
 
-      {isCloudEnv && (
-        <SidebarNavigationModeToggle
-          isOpen={isOpen}
-          value={navigationMode}
-          onChange={setNavigationMode}
-        />
-      )}
+      <SidebarNavigationModeToggle
+        isOpen={isOpen}
+        value={navigationMode}
+        onChange={setNavigationMode}
+        chatEnabled={isCloudEnv}
+      />
 
       {/* Menu Items */}
       <div className="flex-1 overflow-hidden">