diff --git a/__tests__/components/features/sidebar/sidebar.test.tsx b/__tests__/components/features/sidebar/sidebar.test.tsx
index 711089fd5..6fa00a40e 100644
--- a/__tests__/components/features/sidebar/sidebar.test.tsx
+++ b/__tests__/components/features/sidebar/sidebar.test.tsx
@@ -7,6 +7,7 @@ import {
   type NavigationContextValue,
 } from "#/context/navigation-context";
 import translations from "#/i18n/translation.json";
+import { OPENHANDS_SLACK_INVITE_URL } from "#/utils/constants";
 
 // The global `useTranslation` mock in `vitest.setup.ts` returns the key
 // as-is. Override it here so `t(...)` resolves keys via the source-of-truth
@@ -396,6 +397,26 @@ describe("Sidebar", () => {
     }
   });
 
+  it("renders a Join Slack link in the expanded sidebar footer", () => {
+    renderSidebar("/conversations");
+
+    const link = screen.getByTestId("sidebar-join-slack-link");
+    expect(link).toHaveAttribute("href", OPENHANDS_SLACK_INVITE_URL);
+    expect(link).toHaveAttribute("target", "_blank");
+    expect(link).toHaveAttribute("rel", "noopener noreferrer");
+    expect(link).toHaveTextContent("Join Slack");
+  });
+
+  it("renders a Join Slack icon link when the sidebar is collapsed", () => {
+    window.localStorage.setItem("openhands-sidebar-collapsed", "true");
+    renderSidebar("/conversations");
+
+    const link = screen.getByTestId("collapsed-join-slack-link");
+    expect(link).toHaveAttribute("href", OPENHANDS_SLACK_INVITE_URL);
+    expect(link).toHaveAttribute("target", "_blank");
+    expect(link).toHaveAttribute("aria-label", "Join Slack");
+  });
+
   it("renders the renamed top-level nav labels", () => {
     // Arrange
     renderSidebar("/conversations");
diff --git a/src/components/features/sidebar/sidebar.tsx b/src/components/features/sidebar/sidebar.tsx
index 0fe8a658a..c3b20bda3 100644
--- a/src/components/features/sidebar/sidebar.tsx
+++ b/src/components/features/sidebar/sidebar.tsx
@@ -7,6 +7,7 @@ import {
   Server,
   Settings,
 } from "lucide-react";
+import { SiSlack } from "react-icons/si";
 import { OpenHandsLogoButton } from "#/components/shared/buttons/openhands-logo-button";
 import { SidebarNavLink } from "./sidebar-nav-link";
 import { getErrorStatus, useSettings } from "#/hooks/query/use-settings";
@@ -23,6 +24,7 @@ import { SidebarCollapseContext } from "./sidebar-collapse-context";
 import { useSidebarCollapsedState } from "#/hooks/use-sidebar-collapsed";
 import { useClickOutsideElement } from "#/hooks/use-click-outside-element";
 import { useBackendsHealth } from "#/hooks/query/use-backends-health";
+import { OPENHANDS_SLACK_INVITE_URL } from "#/utils/constants";
 import AutomationsIcon from "#/icons/automations.svg?react";
 
 // The LLM settings modal is only mounted when the settings query 404s and
@@ -147,6 +149,7 @@ export function Sidebar() {
     currentPath.startsWith("/skills") ||
     currentPath === "/plugins" ||
     currentPath === "/mcp";
+  const joinSlackLabel = t(I18nKey.SIDEBAR$JOIN_SLACK);
 
   return (
     <SidebarCollapseContext.Provider value={collapsed}>
@@ -327,6 +330,16 @@ export function Sidebar() {
 
         {collapsed && (
           <div className="hidden md:flex md:flex-col md:items-center mt-auto gap-2 pb-2 cursor-pointer">
+            <a
+              href={OPENHANDS_SLACK_INVITE_URL}
+              target="_blank"
+              rel="noopener noreferrer"
+              data-testid="collapsed-join-slack-link"
+              aria-label={joinSlackLabel}
+              className="inline-flex items-center justify-center w-10 h-10 p-0 mx-auto rounded-md transition-colors text-[var(--oh-muted)] hover:text-white hover:bg-[var(--oh-surface-raised)]"
+            >
+              <SiSlack width={16} height={16} aria-hidden />
+            </a>
             <button
               type="button"
               data-testid="collapsed-settings-link"
@@ -420,7 +433,23 @@ export function Sidebar() {
             visual separator above it. Hidden in collapsed mode because the
             control needs full-width space. */}
         {!collapsed && (
-          <div className="hidden md:flex md:flex-col md:items-stretch pt-2 border-t border-[var(--oh-border)] md:-mx-2 md:px-2">
+          <div className="hidden md:flex md:flex-col md:items-stretch pt-2 border-t border-[var(--oh-border)] md:-mx-2 md:px-2 gap-1">
+            <a
+              href={OPENHANDS_SLACK_INVITE_URL}
+              target="_blank"
+              rel="noopener noreferrer"
+              data-testid="sidebar-join-slack-link"
+              className={cn(
+                "flex items-center gap-2 rounded-md transition-colors",
+                "text-sm leading-5 truncate px-2 py-2 w-full",
+                "text-[var(--oh-muted)] hover:text-white hover:bg-[var(--oh-surface-raised)]",
+              )}
+            >
+              <span className="shrink-0 flex items-center justify-center">
+                <SiSlack width={ICON_SIZE} height={ICON_SIZE} aria-hidden />
+              </span>
+              <span className="truncate">{joinSlackLabel}</span>
+            </a>
             <BackendSelector openUpward />
           </div>
         )}
diff --git a/src/i18n/translation.json b/src/i18n/translation.json
index 4e1a23d1f..872ec6225 100644
--- a/src/i18n/translation.json
+++ b/src/i18n/translation.json
@@ -14959,6 +14959,23 @@
     "uk": "Документація",
     "ca": "Documentació"
   },
+  "SIDEBAR$JOIN_SLACK": {
+    "en": "Join Slack",
+    "ja": "Slackに参加",
+    "zh-CN": "加入 Slack",
+    "zh-TW": "加入 Slack",
+    "ko-KR": "Slack 참여",
+    "no": "Bli med i Slack",
+    "it": "Unisciti a Slack",
+    "pt": "Entrar no Slack",
+    "es": "Unirse a Slack",
+    "ar": "انضم إلى Slack",
+    "fr": "Rejoindre Slack",
+    "tr": "Slack'e katıl",
+    "de": "Slack beitreten",
+    "uk": "Приєднатися до Slack",
+    "ca": "Uneix-te a Slack"
+  },
   "SUGGESTIONS$ADD_DOCS": {
     "en": "Add best practices docs for contributors",
     "ja": "コントリビューター向けのベストプラクティスドキュメントを追加",
diff --git a/src/utils/constants.ts b/src/utils/constants.ts
index 1896831bb..8075976ec 100644
--- a/src/utils/constants.ts
+++ b/src/utils/constants.ts
@@ -42,6 +42,8 @@ export const PRODUCT_URL = {
   PRODUCTION: "https://app.all-hands.dev",
 };
 
+export const OPENHANDS_SLACK_INVITE_URL = "https://openhands.dev/joinslack";
+
 export const SETTINGS_FORM = {
   LABEL_CLASSNAME: "text-[11px] font-medium leading-4 tracking-[0.11px]",
 };