diff --git a/packages/app/src/front/components/grid/LogCell.tsx b/packages/app/src/front/components/grid/LogCell.tsx
index 42e8872..5fb8087 100644
--- a/packages/app/src/front/components/grid/LogCell.tsx
+++ b/packages/app/src/front/components/grid/LogCell.tsx
@@ -1,9 +1,11 @@
 import { FsdtLogMessageContent } from '@fullstack-devtool/core'
 import styled from '@emotion/styled'
 import { ObjectView } from '../ObjectView'
+import { StoredMessage } from '../../stores/messageStore'
 
 type LogCellProps = {
   value: FsdtLogMessageContent
+  data: StoredMessage
 }
 
 const StyledLogCell = styled.div`
@@ -13,8 +15,24 @@ const StyledLogCell = styled.div`
   * {
     font-family: ${(props) => props.theme.fontFamily.secondary};
   }
+  display: flex;
+  align-items: center;
 `
 
-export const LogCell = ({ value }: LogCellProps) => {
-  return <StyledLogCell>{typeof value === 'object' ? <ObjectView value={value} /> : value}</StyledLogCell>
+const Quantity = styled.span`
+  margin-left: 8px;
+  background-color: ${(props) => props.theme.colors.primary};
+  color: white;
+  padding: 2px 4px;
+  border-radius: 400px;
+  font-size: 12px;
+`
+
+export const LogCell = ({ value, data }: LogCellProps) => {
+  return (
+    <StyledLogCell>
+      {typeof value === 'object' ? <ObjectView value={value} /> : value}
+      {data.quantity > 1 && <Quantity>{data.quantity}</Quantity>}
+    </StyledLogCell>
+  )
 }
diff --git a/packages/app/src/front/stores/messageStore.ts b/packages/app/src/front/stores/messageStore.ts
index 306ba62..91708ce 100644
--- a/packages/app/src/front/stores/messageStore.ts
+++ b/packages/app/src/front/stores/messageStore.ts
@@ -1,8 +1,13 @@
 import { FsdtLogMessageContent, FsdtServerMessage } from '@fullstack-devtool/core'
 import { create } from 'zustand'
+import { groupMessagesWithTheSameContent } from '../utils/message'
+
+export type StoredMessage = FsdtServerMessage<FsdtLogMessageContent> & {
+  quantity: number
+}
 
 interface MessageState {
-  messages: FsdtServerMessage<FsdtLogMessageContent>[]
+  messages: StoredMessage[]
   sources: string[]
   tags: string[]
   addMessage: (message: FsdtServerMessage<FsdtLogMessageContent>) => void
@@ -16,6 +21,18 @@ export const useMessageStore = create<MessageState>((set) => ({
   tags: [],
   addMessage: (message) =>
     set((state) => {
+      // Group messages with the same content
+      const lastMessage = state.messages[state.messages.length - 1]
+      if (
+        lastMessage &&
+        lastMessage.source === message.source &&
+        lastMessage.data.content === message.data.content &&
+        lastMessage.data.tag === message.data.tag
+      ) {
+        lastMessage.quantity++
+        return { messages: [...state.messages] }
+      }
+      // Add new message
       const newSources = [...state.sources]
       const newTags = [...state.tags]
       if (!newSources.includes(message.source)) {
@@ -24,7 +41,7 @@ export const useMessageStore = create<MessageState>((set) => ({
       if (!newTags.includes(message.data.tag) && message.data.tag) {
         newTags.push(message.data.tag)
       }
-      return { messages: [...state.messages, message], sources: newSources, tags: newTags }
+      return { messages: [...state.messages, { ...message, quantity: 1 }], sources: newSources, tags: newTags }
     }),
   addMessages: (messages) =>
     set((state) => {
@@ -38,7 +55,14 @@ export const useMessageStore = create<MessageState>((set) => ({
           newTags.push(message.data.tag)
         }
       })
-      return { messages: [...state.messages, ...messages], sources: newSources, tags: newTags }
+      return {
+        messages: groupMessagesWithTheSameContent([
+          ...state.messages,
+          ...messages.map((mess) => ({ ...mess, quantity: 1 })),
+        ]),
+        sources: newSources,
+        tags: newTags,
+      }
     }),
   clearMessages: () => set({ messages: [] }),
 }))
diff --git a/packages/app/src/front/utils/message.spec.ts b/packages/app/src/front/utils/message.spec.ts
new file mode 100644
index 0000000..34c131b
--- /dev/null
+++ b/packages/app/src/front/utils/message.spec.ts
@@ -0,0 +1,88 @@
+import { EventType, LogLevel } from '@fullstack-devtool/core'
+import { StoredMessage } from '../stores/messageStore'
+import { groupMessagesWithTheSameContent } from './message'
+
+describe('message', () => {
+  describe('groupMessagesWithTheSameContent', () => {
+    it('should group messages with the same content', () => {
+      const allMessages: StoredMessage[] = [
+        {
+          id: 1,
+          source: 'source1',
+          type: EventType.LOG,
+          data: {
+            content: 'content1',
+            tag: 'tag1',
+            timestamp: '1',
+            level: LogLevel.LOG,
+          },
+          quantity: 1,
+        },
+        {
+          id: 2,
+          source: 'source1',
+          type: EventType.LOG,
+          data: {
+            content: 'content1',
+            tag: 'tag1',
+            timestamp: '2',
+            level: LogLevel.LOG,
+          },
+          quantity: 1,
+        },
+        {
+          id: 3,
+          source: 'source1',
+          type: EventType.LOG,
+          data: {
+            content: 'content2',
+            tag: 'tag1',
+            timestamp: '3',
+            level: LogLevel.LOG,
+          },
+          quantity: 1,
+        },
+        {
+          id: 4,
+          source: 'source1',
+          type: EventType.LOG,
+          data: {
+            content: 'content2',
+            tag: 'tag1',
+            timestamp: '4',
+            level: LogLevel.LOG,
+          },
+          quantity: 1,
+        },
+      ]
+      const groupedMessages: StoredMessage[] = [
+        {
+          id: 1,
+          source: 'source1',
+          type: EventType.LOG,
+          data: {
+            content: 'content1',
+            tag: 'tag1',
+            timestamp: '1',
+            level: LogLevel.LOG,
+          },
+          quantity: 2,
+        },
+        {
+          id: 3,
+          source: 'source1',
+          type: EventType.LOG,
+          data: {
+            content: 'content2',
+            tag: 'tag1',
+            timestamp: '3',
+            level: LogLevel.LOG,
+          },
+          quantity: 2,
+        },
+      ]
+
+      expect(groupMessagesWithTheSameContent(allMessages)).toEqual(groupedMessages)
+    })
+  })
+})
diff --git a/packages/app/src/front/utils/message.ts b/packages/app/src/front/utils/message.ts
new file mode 100644
index 0000000..34335bb
--- /dev/null
+++ b/packages/app/src/front/utils/message.ts
@@ -0,0 +1,19 @@
+import { StoredMessage } from '../stores/messageStore'
+
+export const groupMessagesWithTheSameContent = (messages: StoredMessage[]) => {
+  const groupedMessages: StoredMessage[] = []
+  messages.forEach((message) => {
+    const lastMessage = groupedMessages[groupedMessages.length - 1]
+    if (
+      lastMessage &&
+      lastMessage.source === message.source &&
+      lastMessage.data.content === message.data.content &&
+      lastMessage.data.tag === message.data.tag
+    ) {
+      lastMessage.quantity++
+    } else {
+      groupedMessages.push({ ...message, quantity: 1 })
+    }
+  })
+  return groupedMessages
+}