diff --git a/src/components/Chat/Sidebar/Users/Users.tsx b/src/components/Chat/Sidebar/Users/Users.tsx
index 8b79d7c..a908aeb 100644
--- a/src/components/Chat/Sidebar/Users/Users.tsx
+++ b/src/components/Chat/Sidebar/Users/Users.tsx
@@ -1,39 +1,53 @@
 import React from 'react';
-import { Box, Stack, Text } from '@chakra-ui/react';
+import { observer } from 'mobx-react';
+import { Box, Stack, StackProps, Text } from '@chakra-ui/react';
 import { User } from './User';
 import { useChatContext } from '../../context';
+import { useRootStore } from '@educt/hooks/useRootStore';
+import { Skeleton } from '@chakra-ui/react';
 
-const tempDb = [
-  { id: 'user-1', name: 'Trace Kerluke', lastMessage: 'Hello.', time: '2g' },
-  { id: 'user-2', name: 'Dalton Conn ', lastMessage: 'Hello, how you doing ?', time: '30m' },
-  { id: 'user-3', name: 'Cleo Hane', lastMessage: 'Hi.', time: '1h' },
-];
+const Wrapper: React.FC<StackProps> = ({ children }) => {
+  return (
+    <Stack mt='12' maxH='690px' overflowY={'scroll'} pr={{ base: '0', lg: '3' }}>
+      {children}
+    </Stack>
+  );
+};
 
-const Users: React.FC = () => {
+const Users: React.FC = observer(() => {
+  const { onlineStore } = useRootStore();
   const { search } = useChatContext();
+  const { users } = onlineStore;
 
-  const filtered = !search ? tempDb : tempDb.filter(u => u.name.toLocaleLowerCase().includes(search));
+  if (users === null)
+    return (
+      <Wrapper>
+        <Skeleton h='90px' borderRadius={'lg'} />
+        <Skeleton h='90px' borderRadius={'lg'} />
+      </Wrapper>
+    );
+
+  const filtered = !search ? users : users.filter(u => u.userName.toLocaleLowerCase().includes(search));
   const isEmpty = filtered.length === 0;
 
   return (
-    <Stack mt='12' maxH='690px' overflowY={'scroll'} pr={{ base: '0', lg: '3' }}>
+    <Wrapper>
       {!isEmpty ? (
         filtered.map(u => (
-          <User key={u.id} id={u.id}>
-            <User.Avatar isOnline={false} fullname={u.name} />
-            <User.Info fullname={u.name} lastMessage={u.lastMessage} />
-            <User.Time time={u.time} />
+          <User key={u.userId} id={u.userId}>
+            <User.Avatar isOnline={onlineStore.isOnline(u.userId) || false} fullname={u.userName} />
+            <User.Info fullname={u.userName} lastMessage={''} />
+            <User.Time time={'2h'} />
           </User>
         ))
       ) : (
         <Box textAlign={'center'}>
           <Text userSelect={'none'} color='gray.500'>
-            Cannot find any chat
+            Cannot find any users
           </Text>
         </Box>
       )}
-    </Stack>
+    </Wrapper>
   );
-};
-
+});
 export { Users };
diff --git a/src/components/Chat/Window/Message/Message.tsx b/src/components/Chat/Window/Message/Message.tsx
index 75b66e5..cd4d5de 100644
--- a/src/components/Chat/Window/Message/Message.tsx
+++ b/src/components/Chat/Window/Message/Message.tsx
@@ -1,8 +1,9 @@
-import React from 'react';
-import { Flex } from '@chakra-ui/react';
+import React, { useEffect, useRef } from 'react';
+import { Flex, Stack } from '@chakra-ui/react';
 import { Avatar, IAvatarProps } from './Avatar';
 import { Text, ITextProps } from './Text';
 import { MessageContext } from './context';
+import { MessageType } from '@educt/types';
 
 interface IMessageComposition {
   Avatar: React.FC<IAvatarProps>;
@@ -13,6 +14,22 @@ interface IMyMessageProps {
   isMyMessage: boolean;
 }
 
+const MessageList: React.FC<{ messages: MessageType[] }> = ({ messages, children }) => {
+  const listRef = useRef<HTMLDivElement | null>(null);
+
+  useEffect(() => {
+    if (listRef.current) {
+      listRef.current.scrollTo(0, listRef.current.scrollHeight);
+    }
+  }, [messages]);
+
+  return (
+    <Stack ref={listRef} h='65vh' overflowY={'scroll'} mb='12' mt='6' spacing={'3'} pr='8'>
+      {children}
+    </Stack>
+  );
+};
+
 const Message: React.FC<IMyMessageProps> & IMessageComposition = ({ children, isMyMessage }) => {
   return (
     <MessageContext.Provider value={{ isMyMessage }}>
@@ -26,4 +43,4 @@ const Message: React.FC<IMyMessageProps> & IMessageComposition = ({ children, is
 Message.Avatar = Avatar;
 Message.Text = Text;
 
-export { Message };
+export { MessageList, Message };
diff --git a/src/components/Chat/Window/Message/index.ts b/src/components/Chat/Window/Message/index.ts
index f2d89d2..cd58e02 100644
--- a/src/components/Chat/Window/Message/index.ts
+++ b/src/components/Chat/Window/Message/index.ts
@@ -1 +1 @@
-export { Message } from './Message';
+export * from './Message';
diff --git a/src/components/Chat/Window/Window.tsx b/src/components/Chat/Window/Window.tsx
index 2f267fc..c1c237e 100644
--- a/src/components/Chat/Window/Window.tsx
+++ b/src/components/Chat/Window/Window.tsx
@@ -1,53 +1,131 @@
-import React, { useEffect } from 'react';
-import { GridItem, GridItemProps, Flex, Box, Icon, Text, Input, Heading, IconButton, Stack } from '@chakra-ui/react';
+import React, { ChangeEvent, useContext, useEffect, useState } from 'react';
+import { GridItem, GridItemProps, Flex, Box, Icon, Text, Input, Heading, IconButton, Divider } from '@chakra-ui/react';
 import { MdOutlineChat, MdSend } from 'react-icons/md';
-import { Message } from './Message';
+import { Message, MessageList } from './Message';
+import { useRootStore } from '@educt/hooks/useRootStore';
+import { SocketContext } from '@educt/contexts';
+import { useSocketEvent } from '@educt/hooks/useSocketEvent';
+import { MessageType } from '@educt/types';
 
 const Window: React.FC<GridItemProps> = props => {
+  const {
+    userStore: { me },
+    onlineStore,
+  } = useRootStore();
   const chatId = new URLSearchParams(location.search).get('chat_id');
+  const [inputValue, setInputValue] = useState<string>('');
+  const [messages, setMessages] = useState<MessageType[]>([]);
+  const { socket } = useContext(SocketContext);
+
+  const onSubmit = (e: React.FormEvent<HTMLFormElement>) => {
+    e.preventDefault();
+
+    if (inputValue === '' || me === null) return;
+
+    const message: MessageType = {
+      userName: me.fullname,
+      content: inputValue,
+      time: new Date().toLocaleTimeString(),
+      isMyMessage: true,
+    };
+
+    /**
+     * Emit event to server and update messages state
+     */
+    if (chatId) {
+      socket?.emit('message:private', {
+        content: message.content,
+        to: chatId,
+      });
+      setMessages(prev => [...prev, message]);
+      setInputValue('');
+    }
+  };
+
+  const onChangeInputValue = (e: ChangeEvent<HTMLInputElement>) => setInputValue(e.target.value);
 
   useEffect(() => {
+    // TODO load message history
     console.log('chat id changed!');
+    setMessages([]);
   }, [chatId]);
 
+  // TODO add types for this event
+  useSocketEvent('message:private', data => {
+    const user = onlineStore.getUser(data.from);
+    console.log('message!');
+
+    if (user) {
+      if (chatId === data.from) {
+        /**
+         * Do not add duplicate of message
+         */
+        if (data.to === data.from) return;
+
+        const message: MessageType = {
+          content: data.content,
+          userName: user.userName,
+          isMyMessage: false,
+          time: new Date().toLocaleTimeString(),
+        };
+
+        setMessages(prev => [...prev, message]);
+      }
+    }
+  });
+
   return (
     <GridItem pt={'7rem'} pb='5' px='12' {...props}>
       {chatId ? (
         <Flex flexDir={'column'}>
           <Box my='3'>
             <Heading as='h2' fontWeight={'semibold'} fontSize='3xl'>
-              John Doe
+              {chatId}
             </Heading>
           </Box>
-          <Stack h='65vh' overflowY={'scroll'} mb='12' mt='6' spacing={'3'} pr='8'>
-            <Message isMyMessage={false}>
-              <Message.Avatar fullname='John Doe' />
-              <Message.Text content={'Lorem ipsum dolor sit amet consectetur adipisicing elit.'} time='18:00' />
-            </Message>
-            <Message isMyMessage={true}>
-              <Message.Avatar fullname='Sergey Yarkov' />
-              <Message.Text content={'Lorem ipsum dolor sit amet consectetur.'} time='18:00' />
-            </Message>
-          </Stack>
-          <Flex mt='auto' alignItems={'flex-end'}>
-            <Input
-              resize={'block'}
-              type='text'
-              placeholder='Write a message...'
-              maxW='900px'
-              variant={'outline'}
-              rounded='xl'
-              mr='2'
-            />
-            <IconButton
-              icon={<MdSend />}
-              aria-label='Send message'
-              variant={'ghost'}
-              _hover={{ bg: 'inherit' }}
-              _active={{ bg: 'inherit' }}
-              _focus={{ outline: 'none' }}
-            />
-          </Flex>
+
+          <Divider my='2' />
+
+          <MessageList messages={messages}>
+            {messages.length !== 0 ? (
+              messages.map((message, i) => (
+                <Message key={i} isMyMessage={message.isMyMessage}>
+                  <Message.Avatar fullname={message.userName} />
+                  <Message.Text content={message.content} time={message.time} />
+                </Message>
+              ))
+            ) : (
+              <Box>
+                <Text mt='5' textAlign={'center'} color='gray.500' userSelect={'none'}>
+                  Your message history will be displayed here.
+                </Text>
+              </Box>
+            )}
+          </MessageList>
+          <form onSubmit={e => onSubmit(e)}>
+            <Flex mt='auto' alignItems={'flex-end'}>
+              <Input
+                onChange={onChangeInputValue}
+                value={inputValue}
+                resize={'block'}
+                type='text'
+                placeholder='Write a message...'
+                maxW='900px'
+                variant={'outline'}
+                rounded='xl'
+                mr='2'
+              />
+              <IconButton
+                type='submit'
+                icon={<MdSend />}
+                aria-label='Send message'
+                variant={'ghost'}
+                _hover={{ bg: 'inherit' }}
+                _active={{ bg: 'inherit' }}
+                _focus={{ outline: 'none' }}
+              />
+            </Flex>
+          </form>
         </Flex>
       ) : (
         <Box textAlign={'center'} mt={{ base: '0', lg: '15rem' }}>
diff --git a/src/hooks/useSocketEvent.ts b/src/hooks/useSocketEvent.ts
index 272597b..0a81121 100644
--- a/src/hooks/useSocketEvent.ts
+++ b/src/hooks/useSocketEvent.ts
@@ -1,7 +1,7 @@
 import { useContext, useEffect } from 'react';
 import { SocketContext } from '@educt/contexts';
 
-export const useSocketEvent = (event: string, callback: (...args: any) => void) => {
+export const useSocketEvent = (event: string, callback: (...args: unknown[]) => void) => {
   const { socket } = useContext(SocketContext);
 
   useEffect(() => {
diff --git a/src/pages/messages/messages.tsx b/src/pages/messages/messages.tsx
index fc1d8d7..b2ca915 100644
--- a/src/pages/messages/messages.tsx
+++ b/src/pages/messages/messages.tsx
@@ -2,6 +2,7 @@ import React from 'react';
 import { Page } from '@educt/components/PageElements';
 import { IPageProps } from '@educt/interfaces';
 import { Chat } from '@educt/components/Chat';
+import { observer } from 'mobx-react';
 
 /**
  * Messages page
@@ -22,4 +23,4 @@ const MessagesPage: React.FC<IPageProps> = () => {
   );
 };
 
-export default MessagesPage;
+export default observer(MessagesPage);
diff --git a/src/stores/OnlineStore.ts b/src/stores/OnlineStore.ts
index 1aab713..8ba68d0 100644
--- a/src/stores/OnlineStore.ts
+++ b/src/stores/OnlineStore.ts
@@ -1,27 +1,39 @@
 import { makeAutoObservable } from 'mobx';
 import RootStore from './RootStore';
 
+type UserType = {
+  userId: string;
+  userName: string;
+};
+
 export default class OnlineStore {
   public root: RootStore;
 
-  public online: Set<string>;
+  public online: Map<string, UserType> | null = null;
 
   constructor(root: RootStore) {
     this.root = root;
-    this.online = new Set();
 
     makeAutoObservable(this);
   }
 
-  public loadOnline(online: string[]) {
-    this.online = new Set(online);
+  public loadOnline(online: [string, UserType][]) {
+    this.online = new Map(online);
   }
 
   public isOnline(id: string) {
-    return this.online.has(id);
+    return this.online && this.online.has(id);
+  }
+
+  public getUser(id: string) {
+    return this.online && this.online.get(id);
   }
 
   public get count() {
-    return this.online.size;
+    return this.online && this.online.size;
+  }
+
+  public get users() {
+    return this.online && Array.from(this.online).map(entry => entry[1]);
   }
 }
diff --git a/src/types/index.d.ts b/src/types/index.d.ts
index e58f1cf..e673964 100644
--- a/src/types/index.d.ts
+++ b/src/types/index.d.ts
@@ -62,6 +62,13 @@ export type ConfirmEmailContainerDataType = {
   expired_seconds: number;
 };
 
+export type MessageType = {
+  userName: string;
+  content: string;
+  time: string;
+  isMyMessage: boolean;
+};
+
 /**
  * Change email page context
  */