diff --git a/src/client/components/WebsiteOnlineCount.tsx b/src/client/components/WebsiteOnlineCount.tsx
new file mode 100644
index 0000000..50ce6f1
--- /dev/null
+++ b/src/client/components/WebsiteOnlineCount.tsx
@@ -0,0 +1,26 @@
+import React from 'react';
+import { trpc } from '../api/trpc';
+
+export const WebsiteOnlineCount: React.FC<{
+  workspaceId: string;
+  websiteId: string;
+}> = React.memo((props) => {
+  const { workspaceId, websiteId } = props;
+
+  const { data: count } = trpc.website.onlineCount.useQuery({
+    workspaceId,
+    websiteId,
+  });
+
+  if (typeof count === 'number' && count > 0) {
+    return (
+      <div className="flex items-center space-x-2">
+        <div className="w-2.5 h-2.5 rounded-full bg-green-500" />
+        <span>{count} current visitor</span>
+      </div>
+    );
+  }
+
+  return null;
+});
+WebsiteOnlineCount.displayName = 'WebsiteOnlineCount';
diff --git a/src/client/components/WebsiteOverview.tsx b/src/client/components/WebsiteOverview.tsx
index 2ad4749..08aea41 100644
--- a/src/client/components/WebsiteOverview.tsx
+++ b/src/client/components/WebsiteOverview.tsx
@@ -23,6 +23,7 @@ import { useEvent } from '../hooks/useEvent';
 import { MetricCard } from './MetricCard';
 import { formatNumber, formatShortTime } from '../utils/common';
 import { useTheme } from '../hooks/useTheme';
+import { WebsiteOnlineCount } from './WebsiteOnlineCount';
 
 interface WebsiteOverviewProps {
   workspaceId: string;
@@ -110,6 +111,13 @@ const WebsiteOverviewItem: React.FC<{
               status: 'health',
             }))}
           />
+
+          <div className="ml-4 text-base font-normal">
+            <WebsiteOnlineCount
+              workspaceId={props.website.workspaceId}
+              websiteId={props.website.id}
+            />
+          </div>
         </div>
 
         <div>
diff --git a/src/server/model/website.ts b/src/server/model/website.ts
index cbe6d9c..4719962 100644
--- a/src/server/model/website.ts
+++ b/src/server/model/website.ts
@@ -10,6 +10,7 @@ import {
   URL_LENGTH,
 } from '../utils/const';
 import type { DynamicData } from '../utils/types';
+import dayjs from 'dayjs';
 
 export interface WebsiteEventPayload {
   data?: object;
@@ -255,3 +256,20 @@ export async function saveWebsiteSessionData(data: {
     }),
   ]);
 }
+
+export async function getWebsiteOnlineUserCount(
+  websiteId: string
+): Promise<number> {
+  const startAt = dayjs().subtract(5, 'minutes').toDate();
+
+  interface Ret {
+    x: number;
+  }
+
+  const res = await prisma.$queryRaw<
+    Ret[]
+  >`SELECT count(distinct "sessionId") x FROM "WebsiteEvent" where "websiteId" = ${websiteId}::uuid AND "createdAt" >= ${startAt}`;
+  console.log('res', res);
+
+  return res?.[0].x ?? 0;
+}
diff --git a/src/server/trpc/index.ts b/src/server/trpc/index.ts
index 449a4a0..1a23390 100644
--- a/src/server/trpc/index.ts
+++ b/src/server/trpc/index.ts
@@ -1,12 +1,10 @@
 import * as trpcExpress from '@trpc/server/adapters/express';
-import { createContext, publicProcedure, router } from './trpc';
-import { z } from 'zod';
+import { createContext, router } from './trpc';
 import { notificationRouter } from './routers/notification';
+import { websiteRouter } from './routers/website';
 
 const appRouter = router({
-  debug: publicProcedure.input(z.string()).query((opts) => {
-    return { id: opts.input, name: 'Bilbo' };
-  }),
+  website: websiteRouter,
   notification: notificationRouter,
 });
 
diff --git a/src/server/trpc/routers/website.ts b/src/server/trpc/routers/website.ts
new file mode 100644
index 0000000..984ef33
--- /dev/null
+++ b/src/server/trpc/routers/website.ts
@@ -0,0 +1,19 @@
+import { router, workspaceProcedure } from '../trpc';
+import { z } from 'zod';
+import { getWebsiteOnlineUserCount } from '../../model/website';
+
+export const websiteRouter = router({
+  onlineCount: workspaceProcedure
+    .input(
+      z.object({
+        websiteId: z.string(),
+      })
+    )
+    .query(async ({ input }) => {
+      const websiteId = input.websiteId;
+
+      const count = await getWebsiteOnlineUserCount(websiteId);
+
+      return count;
+    }),
+});