diff --git a/packages/core/src/time.ts b/packages/core/src/time.ts
index fadb0dc6dd..5cb82eb0d9 100644
--- a/packages/core/src/time.ts
+++ b/packages/core/src/time.ts
@@ -20,6 +20,12 @@ export function getDay (time: Timestamp): Timestamp {
   return date.getTime()
 }
 
+export function getHour (time: Timestamp): Timestamp {
+  const date: Date = new Date(time)
+  date.setMinutes(0, 0, 0)
+  return date.getTime()
+}
+
 export function getDisplayTime (time: number): string {
   let options: Intl.DateTimeFormatOptions = { hour: 'numeric', minute: 'numeric' }
   if (!isToday(time)) {
@@ -37,6 +43,10 @@ export function isOtherDay (time1: Timestamp, time2: Timestamp): boolean {
   return getDay(time1) !== getDay(time2)
 }
 
+export function isOtherHour (time1: Timestamp, time2: Timestamp): boolean {
+  return getHour(time1) !== getHour(time2)
+}
+
 function isToday (time: number): boolean {
   const current = new Date()
   const target = new Date(time)
diff --git a/plugins/activity-resources/src/components/Activity.svelte b/plugins/activity-resources/src/components/Activity.svelte
index c608d32bb0..3f47af0804 100644
--- a/plugins/activity-resources/src/components/Activity.svelte
+++ b/plugins/activity-resources/src/components/Activity.svelte
@@ -21,6 +21,7 @@
   import ActivityExtensionComponent from './ActivityExtension.svelte'
   import ActivityFilter from './ActivityFilter.svelte'
   import { combineActivityMessages } from '../activityMessagesUtils'
+  import { canGroupMessages } from '../utils'
 
   export let object: Doc
   export let showCommenInput: boolean = true
@@ -95,14 +96,16 @@
 <div class="p-activity select-text" id={activity.string.Activity} class:newest-first={isNewestFirst}>
   {#if filteredMessages.length}
     <Grid column={1} rowGap={0}>
-      {#each filteredMessages as message}
+      {#each filteredMessages as message, index}
+        {@const canGroup = canGroupMessages(message, filteredMessages[index - 1])}
         <Lazy>
           <Component
             is={activity.component.ActivityMessagePresenter}
             props={{
               value: message,
               hideLink: true,
-              boundary
+              boundary,
+              type: canGroup ? 'short' : 'default'
             }}
           />
         </Lazy>
diff --git a/plugins/activity-resources/src/components/MessageTimestamp.svelte b/plugins/activity-resources/src/components/MessageTimestamp.svelte
index 822a9f8518..8ebfcc10e6 100644
--- a/plugins/activity-resources/src/components/MessageTimestamp.svelte
+++ b/plugins/activity-resources/src/components/MessageTimestamp.svelte
@@ -19,6 +19,7 @@
   import { getEmbeddedLabel } from '@hcengineering/platform'
 
   export let date: Timestamp
+  export let shortTime = false
 
   $: fullDate = new Date(date).toLocaleString('default', {
     minute: '2-digit',
@@ -27,8 +28,14 @@
     month: 'short',
     year: 'numeric'
   })
+
+  function getShortTime (date: Timestamp): string {
+    const options: Intl.DateTimeFormatOptions = { hour: 'numeric', minute: 'numeric' }
+
+    return new Date(date).toLocaleTimeString('default', options).split(' ')[0]
+  }
 </script>
 
 <span class="text-sm" use:tooltip={{ label: getEmbeddedLabel(fullDate) }}>
-  {getDisplayTime(date)}
+  {shortTime ? getShortTime(date) : getDisplayTime(date)}
 </span>
diff --git a/plugins/activity-resources/src/components/activity-message/ActivityMessagePresenter.svelte b/plugins/activity-resources/src/components/activity-message/ActivityMessagePresenter.svelte
index 759b0b011a..49f5fb865a 100644
--- a/plugins/activity-resources/src/components/activity-message/ActivityMessagePresenter.svelte
+++ b/plugins/activity-resources/src/components/activity-message/ActivityMessagePresenter.svelte
@@ -13,7 +13,7 @@
 // limitations under the License.
 -->
 <script lang="ts">
-  import { DisplayActivityMessage } from '@hcengineering/activity'
+  import { DisplayActivityMessage, ActivityMessageViewType } from '@hcengineering/activity'
   import view from '@hcengineering/view'
   import { getClient } from '@hcengineering/presentation'
   import { Action, Component } from '@hcengineering/ui'
@@ -34,6 +34,7 @@
   export let hoverStyles: 'borderedHover' | 'filledHover' = 'borderedHover'
   export let withShowMore: boolean = true
   export let attachmentImageSize: 'x-large' | undefined = undefined
+  export let type: ActivityMessageViewType = 'default'
   export let showLinksPreview = true
   export let videoPreload = true
   export let hideLink = false
@@ -68,6 +69,7 @@
       showLinksPreview,
       videoPreload,
       hideLink,
+      type,
       compact,
       onClick
     }}
diff --git a/plugins/activity-resources/src/components/activity-message/ActivityMessageTemplate.svelte b/plugins/activity-resources/src/components/activity-message/ActivityMessageTemplate.svelte
index 3aef41eaf1..def8ac1209 100644
--- a/plugins/activity-resources/src/components/activity-message/ActivityMessageTemplate.svelte
+++ b/plugins/activity-resources/src/components/activity-message/ActivityMessageTemplate.svelte
@@ -13,7 +13,11 @@
 // limitations under the License.
 -->
 <script lang="ts">
-  import activity, { ActivityMessageViewlet, DisplayActivityMessage } from '@hcengineering/activity'
+  import activity, {
+    ActivityMessageViewlet,
+    DisplayActivityMessage,
+    ActivityMessageViewType
+  } from '@hcengineering/activity'
   import { Person } from '@hcengineering/contact'
   import { Avatar, EmployeePresenter, SystemAvatar } from '@hcengineering/contact-resources'
   import core from '@hcengineering/core'
@@ -47,6 +51,7 @@
   export let hoverable = true
   export let hoverStyles: 'borderedHover' | 'filledHover' = 'borderedHover'
   export let showDatePreposition = false
+  export let type: ActivityMessageViewType = 'default'
   export let onClick: (() => void) | undefined = undefined
 
   const client = getClient()
@@ -93,6 +98,12 @@
 
   let readonly: boolean = false
   $: readonly = $restrictionStore.disableComments
+
+  function canDisplayShort (type: ActivityMessageViewType, isSaved: boolean): boolean {
+    return type === 'short' && !isSaved && (message.replies ?? 0) === 0
+  }
+
+  $: isShort = canDisplayShort(type, isSaved)
 </script>
 
 {#if !isHidden}
@@ -119,10 +130,16 @@
         isActionsOpened = true
       }}
     >
-      {#if showNotify && !embedded}
+      {#if showNotify && !embedded && !isShort}
         <div class="notify" />
       {/if}
-      {#if !embedded}
+      {#if embedded}
+        <div class="embeddedMarker" />
+      {:else if isShort}
+        <span class="text-sm lower time">
+          <MessageTimestamp date={message.createdOn ?? message.modifiedOn} shortTime />
+        </span>
+      {:else}
         <div class="min-w-6 mt-1 relative">
           {#if $$slots.icon}
             <slot name="icon" />
@@ -137,33 +154,33 @@
             </div>
           {/if}
         </div>
-      {:else}
-        <div class="embeddedMarker" />
       {/if}
       <div class="flex-col ml-2 w-full clear-mins message-content">
-        <div class="header clear-mins">
-          {#if person}
-            <EmployeePresenter value={person} shouldShowAvatar={false} compact />
-          {:else}
-            <div class="strong">
-              <Label label={core.string.System} />
-            </div>
-          {/if}
+        {#if !isShort}
+          <div class="header clear-mins">
+            {#if person}
+              <EmployeePresenter value={person} shouldShowAvatar={false} compact />
+            {:else}
+              <div class="strong">
+                <Label label={core.string.System} />
+              </div>
+            {/if}
 
-          {#if !skipLabel}
-            <slot name="header" />
-          {/if}
+            {#if !skipLabel}
+              <slot name="header" />
+            {/if}
+
+            {#if !skipLabel && showDatePreposition}
+              <span class="text-sm lower">
+                <Label label={activity.string.At} />
+              </span>
+            {/if}
 
-          {#if !skipLabel && showDatePreposition}
             <span class="text-sm lower">
-              <Label label={activity.string.At} />
+              <MessageTimestamp date={message.createdOn ?? message.modifiedOn} />
             </span>
-          {/if}
-
-          <span class="text-sm lower">
-            <MessageTimestamp date={message.createdOn ?? message.modifiedOn} />
-          </span>
-        </div>
+          </div>
+        {/if}
 
         <slot name="content" />
 
@@ -203,7 +220,7 @@
     position: relative;
     display: flex;
     flex-shrink: 0;
-    padding: 0.75rem 0.75rem 0.75rem 1rem;
+    padding: 0.5rem 0.75rem 0.5rem 1rem;
     gap: 1rem;
     //overflow: hidden;
     border: 1px solid transparent;
@@ -243,6 +260,18 @@
       visibility: visible;
     }
 
+    &:hover > .time {
+      visibility: visible;
+    }
+
+    .time {
+      display: flex;
+      justify-content: end;
+      width: 2.5rem;
+      visibility: hidden;
+      margin-top: 0.125rem;
+    }
+
     &.actionsOpened {
       &.borderedHover {
         border: 1px solid var(--global-ui-BackgroundColor);
diff --git a/plugins/activity-resources/src/components/doc-update-message/DocUpdateMessagePresenter.svelte b/plugins/activity-resources/src/components/doc-update-message/DocUpdateMessagePresenter.svelte
index a449ef867b..019171deaa 100644
--- a/plugins/activity-resources/src/components/doc-update-message/DocUpdateMessagePresenter.svelte
+++ b/plugins/activity-resources/src/components/doc-update-message/DocUpdateMessagePresenter.svelte
@@ -15,6 +15,7 @@
 <script lang="ts">
   import activity, {
     ActivityMessage,
+    ActivityMessageViewType,
     DisplayActivityMessage,
     DisplayDocUpdateMessage,
     DocUpdateMessage,
@@ -35,6 +36,7 @@
   import DocUpdateMessageHeader from './DocUpdateMessageHeader.svelte'
 
   import { getAttributeModel, getCollectionAttribute } from '../../activityMessagesUtils'
+  import { getIsTextType } from '../../utils'
 
   export let value: DisplayDocUpdateMessage
   export let showNotify: boolean = false
@@ -50,6 +52,7 @@
   export let hoverable = true
   export let hoverStyles: 'borderedHover' | 'filledHover' = 'borderedHover'
   export let hideLink = false
+  export let type: ActivityMessageViewType = 'default'
   export let onClick: (() => void) | undefined = undefined
 
   const client = getClient()
@@ -169,6 +172,7 @@
   {skipLabel}
   {hoverable}
   {hoverStyles}
+  type={viewlet?.label || getIsTextType(attributeModel) ? 'default' : type}
   showDatePreposition={hideLink}
   {onClick}
 >
diff --git a/plugins/activity-resources/src/utils.ts b/plugins/activity-resources/src/utils.ts
index 9465991c2e..058c7f49f5 100644
--- a/plugins/activity-resources/src/utils.ts
+++ b/plugins/activity-resources/src/utils.ts
@@ -17,7 +17,8 @@ import core, {
   TxProcessor,
   type TxUpdateDoc,
   matchQuery,
-  getCurrentAccount
+  getCurrentAccount,
+  isOtherHour
 } from '@hcengineering/core'
 import { type Asset, type IntlString, getResource, translate } from '@hcengineering/platform'
 import { getAttributePresenterClass, getClient } from '@hcengineering/presentation'
@@ -520,9 +521,36 @@ export async function unpinMessage (message?: ActivityMessage): Promise<void> {
   await client.update(message, { isPinned: false })
 }
 
-export function getIsTextType (attributeModel: AttributeModel): boolean {
+export function getIsTextType (attributeModel?: AttributeModel): boolean {
+  if (attributeModel === undefined) {
+    return false
+  }
+
   return (
     attributeModel.attribute?.type?._class === core.class.TypeMarkup ||
     attributeModel.attribute?.type?._class === core.class.TypeCollaborativeMarkup
   )
 }
+
+const groupMessagesThresholdMs = 15 * 60 * 1000
+
+type MessageData = Pick<ActivityMessage, '_class' | 'createdBy' | 'createdOn' | 'modifiedOn'>
+
+export function canGroupMessages (message: MessageData, prevMessage?: MessageData): boolean {
+  if (prevMessage === undefined) {
+    return false
+  }
+
+  if (message.createdBy !== prevMessage.createdBy || message._class !== prevMessage._class) {
+    return false
+  }
+
+  const time1 = message.createdOn ?? message.modifiedOn
+  const time2 = prevMessage.createdOn ?? prevMessage.modifiedOn
+
+  if (isOtherHour(time1, time2)) {
+    return false
+  }
+
+  return time1 - time2 < groupMessagesThresholdMs
+}
diff --git a/plugins/activity/src/index.ts b/plugins/activity/src/index.ts
index a6ffdeaa89..00b4bc2a70 100644
--- a/plugins/activity/src/index.ts
+++ b/plugins/activity/src/index.ts
@@ -313,6 +313,7 @@ export interface UserMentionInfo extends AttachedDoc {
 export interface IgnoreActivity extends Class<Doc> {}
 
 export type ActivityMessagePreviewType = 'full' | 'content-only'
+export type ActivityMessageViewType = 'default' | 'short'
 
 export default plugin(activityId, {
   mixin: {
diff --git a/plugins/chunter-resources/src/channelDataProvider.ts b/plugins/chunter-resources/src/channelDataProvider.ts
index 7e8932493c..1832e4b74a 100644
--- a/plugins/chunter-resources/src/channelDataProvider.ts
+++ b/plugins/chunter-resources/src/channelDataProvider.ts
@@ -34,9 +34,11 @@ import chunter from './plugin'
 
 export type LoadMode = 'forward' | 'backward'
 
-interface MessageMetadata {
+export interface MessageMetadata {
   _id: Ref<ActivityMessage>
+  _class: Ref<Class<ActivityMessage>>
   createdOn?: Timestamp
+  modifiedOn: Timestamp
   createdBy?: Ref<Account>
 }
 
@@ -54,6 +56,7 @@ interface IChannelDataProvider {
   messagesStore: Readable<ActivityMessage[]>
   newTimestampStore: Readable<Timestamp | undefined>
   datesStore: Readable<Timestamp[]>
+  metadataStore: Readable<MessageMetadata[]>
 
   loadMore: (mode: LoadMode, loadAfter: Timestamp) => Promise<void>
   canLoadMore: (mode: LoadMode, loadAfter: Timestamp) => boolean
@@ -72,7 +75,7 @@ export class ChannelDataProvider implements IChannelDataProvider {
   private selectedMsgId: Ref<ActivityMessage> | undefined = undefined
   private tailStart: Timestamp | undefined = undefined
 
-  private readonly metadataStore = writable<MessageMetadata[]>([])
+  public readonly metadataStore = writable<MessageMetadata[]>([])
   private readonly tailStore = writable<ActivityMessage[]>([])
   private readonly chunksStore = writable<Chunk[]>([])
 
@@ -166,7 +169,7 @@ export class ChannelDataProvider implements IChannelDataProvider {
         void this.loadInitialMessages(undefined, loadAll)
       },
       {
-        projection: { _id: 1, createdOn: 1, createdBy: 1, attachedTo: 1 },
+        projection: { _id: 1, _class: 1, createdOn: 1, createdBy: 1, attachedTo: 1, modifiedOn: 1 },
         sort: { createdOn: SortingOrder.Ascending }
       }
     )
diff --git a/plugins/chunter-resources/src/components/ChannelScrollView.svelte b/plugins/chunter-resources/src/components/ChannelScrollView.svelte
index 02a5927cf6..f1952afc5e 100644
--- a/plugins/chunter-resources/src/components/ChannelScrollView.svelte
+++ b/plugins/chunter-resources/src/components/ChannelScrollView.svelte
@@ -24,7 +24,8 @@
   import { Loading, Scroller, ScrollParams } from '@hcengineering/ui'
   import {
     ActivityExtension as ActivityExtensionComponent,
-    ActivityMessagePresenter
+    ActivityMessagePresenter,
+    canGroupMessages
   } from '@hcengineering/activity-resources'
   import { InboxNotificationsClientImpl } from '@hcengineering/notification-resources'
   import { get } from 'svelte/store'
@@ -34,7 +35,7 @@
   import ActivityMessagesSeparator from './ChannelMessagesSeparator.svelte'
   import { filterChatMessages, getClosestDate, readChannelMessages } from '../utils'
   import HistoryLoading from './LoadingHistory.svelte'
-  import { ChannelDataProvider } from '../channelDataProvider'
+  import { ChannelDataProvider, MessageMetadata } from '../channelDataProvider'
   import JumpToDateSelector from './JumpToDateSelector.svelte'
 
   export let provider: ChannelDataProvider
@@ -71,6 +72,7 @@
   const isLoadingMoreStore = provider.isLoadingMoreStore
   const newTimestampStore = provider.newTimestampStore
   const datesStore = provider.datesStore
+  const metadataStore = provider.metadataStore
 
   let messages: ActivityMessage[] = []
   let displayMessages: DisplayActivityMessage[] = []
@@ -553,6 +555,17 @@
   }
 
   $: void compensateAside(isAsideOpened)
+
+  function canGroupChatMessages (message: ActivityMessage, prevMessage?: ActivityMessage) {
+    let prevMetadata: MessageMetadata | undefined = undefined
+
+    if (prevMessage === undefined) {
+      const metadata = $metadataStore
+      prevMetadata = metadata.find((_, index) => metadata[index + 1]?._id === message._id)
+    }
+
+    return canGroupMessages(message, prevMessage ?? prevMetadata)
+  }
 </script>
 
 {#if isLoading}
@@ -589,6 +602,7 @@
 
       {#each displayMessages as message, index (message._id)}
         {@const isSelected = message._id === selectedMessageId}
+        {@const canGroup = canGroupChatMessages(message, displayMessages[index - 1])}
 
         {#if separatorIndex === index}
           <ActivityMessagesSeparator bind:element={separatorElement} label={activity.string.New} />
@@ -609,6 +623,7 @@
             withShowMore={false}
             attachmentImageSize="x-large"
             showLinksPreview={false}
+            type={canGroup ? 'short' : 'default'}
             hideLink
           />
         </div>
@@ -633,7 +648,6 @@
 <style lang="scss">
   .msg {
     margin: 0;
-    min-height: 4.375rem;
     height: auto;
     display: flex;
     flex-direction: column;
diff --git a/plugins/chunter-resources/src/components/chat-message/ChatMessagePopup.svelte b/plugins/chunter-resources/src/components/chat-message/ChatMessagePopup.svelte
index 345a7adc8b..dda74298d4 100644
--- a/plugins/chunter-resources/src/components/chat-message/ChatMessagePopup.svelte
+++ b/plugins/chunter-resources/src/components/chat-message/ChatMessagePopup.svelte
@@ -21,6 +21,7 @@
   import chunter, { ChatMessage } from '@hcengineering/chunter'
   import { closeTooltip, Label, Lazy, Spinner, resizeObserver, MiniToggle } from '@hcengineering/ui'
   import { ObjectPresenter, DocNavLink } from '@hcengineering/view-resources'
+  import { canGroupMessages } from '@hcengineering/activity-resources'
 
   import ChatMessageInput from './ChatMessageInput.svelte'
   import ChatMessagePresenter from './ChatMessagePresenter.svelte'
@@ -83,10 +84,11 @@
         <Spinner />
       </div>
     {:else}
-      {#each messages as message}
+      {#each messages as message, index}
+        {@const canGroup = canGroupMessages(message, messages[index - 1])}
         <div class="item">
           <Lazy>
-            <ChatMessagePresenter value={message} hideLink />
+            <ChatMessagePresenter value={message} hideLink type={canGroup ? 'short' : 'default'} />
           </Lazy>
         </div>
       {/each}
@@ -131,10 +133,6 @@
       .item {
         max-width: 30rem;
       }
-
-      .item + .item {
-        margin-top: 0.75rem;
-      }
     }
 
     .input {
diff --git a/plugins/chunter-resources/src/components/chat-message/ChatMessagePresenter.svelte b/plugins/chunter-resources/src/components/chat-message/ChatMessagePresenter.svelte
index 01c289d203..9e41de805f 100644
--- a/plugins/chunter-resources/src/components/chat-message/ChatMessagePresenter.svelte
+++ b/plugins/chunter-resources/src/components/chat-message/ChatMessagePresenter.svelte
@@ -21,7 +21,7 @@
   import { getDocLinkTitle, LinkPresenter } from '@hcengineering/view-resources'
   import { Action, Button, IconEdit, ShowMore } from '@hcengineering/ui'
   import view from '@hcengineering/view'
-  import activity, { DisplayActivityMessage } from '@hcengineering/activity'
+  import activity, { ActivityMessageViewType, DisplayActivityMessage } from '@hcengineering/activity'
   import { ActivityDocLink, ActivityMessageTemplate } from '@hcengineering/activity-resources'
   import chunter, { ChatMessage, ChatMessageViewlet } from '@hcengineering/chunter'
   import { Attachment } from '@hcengineering/attachment'
@@ -49,6 +49,7 @@
   export let videoPreload = true
   export let hideLink = false
   export let compact = false
+  export let type: ActivityMessageViewType = 'default'
   export let onClick: (() => void) | undefined = undefined
 
   const client = getClient()
@@ -181,6 +182,7 @@
     {hoverStyles}
     {skipLabel}
     showDatePreposition={hideLink}
+    {type}
     {onClick}
   >
     <svelte:fragment slot="header">
diff --git a/plugins/chunter-resources/src/components/threads/ThreadView.svelte b/plugins/chunter-resources/src/components/threads/ThreadView.svelte
index 2f26bc1161..1ecf0eb582 100644
--- a/plugins/chunter-resources/src/components/threads/ThreadView.svelte
+++ b/plugins/chunter-resources/src/components/threads/ThreadView.svelte
@@ -121,7 +121,7 @@
           loadMoreAllowed={false}
         >
           <svelte:fragment slot="header">
-            <div class="mt-3 mr-6 ml-6">
+            <div class="mt-3">
               <ThreadParentMessage {message} />
             </div>
             <div class="separator">