1. WhatsApp 信使：
WhatsApp Messenger，或简称 WhatsApp，是 Facebook, Inc. 旗下的跨平台消息传递服务。它允许用户发送文本消息、语音消息、进行语音通话、视频通话、共享图像、文档、用户位置和其他媒体。
2. 电报：
Telegram 是一种基于云的即时消息和 IP 语音服务。它允许用户发送消息和交换任何类型的照片、视频、贴纸、音频和文件。
WhatsApp Messenger 和 Telegram 的区别：
| Telegram | |
|---|---|
| It is owned by Facebook, Inc. | It is owned by Telegram Messenger LLP. |
| It was launched on 3rd May, 2009. | It was launched in 14th Aug 2013. |
| It was developed by Jan Koum and Brian Acton. | It was developed by Pavel Durov. |
| We can do phone calls using whatsapp. | We can not do phone calls using telegram. |
| Whatsapp does not have built-in browser. | Telegram has built-in browser, so you we can open links and websites while still inside the app. |
| In whatsapp anyone can send message to you. | In telegram you have to add or accept contacts before messaging. It prevents strangers fron sending you unwanted messages. |
| There is no option such that an image which automatically disappears once the person has seen it. | In telegram you can send an image which can disappear once the person has seen it. |
| It supports less languages as compared to telegram. | It supports more languages as compared to whatsapp. |
| Whatsapp requires a SIM card to log in. | Telegram does not require a SIM card to log in. |
| It has less rating in play store as compared to telegram. | It has more rating in play store as compared to whatsapp. |