1. Skype :
Skype 是一种电信应用程序，可在手机之间提供视频通话和语音通话。计算机和其他设备。它需要互联网设施来提供其任何服务。它还用于可以包含文本、图像、音频或视频的消息传递。它允许在视频会议通话中一次连接多个人。它由 Skype Technologies 于 2003 年推出。它目前归微软公司所有。它是最常用的视频聊天应用程序之一。
2. 脸书信使：
Facebook Messenger 是由 Facebook 开发的美国消息应用和平台。它允许用户发送消息、交换照片、视频、贴纸、音频和文件，对其他用户的消息做出反应并与机器人交互，支持语音和视频通话。
Skype 和 Facebook Messenger 的区别：
| Skype | Facebook Messenger |
|---|---|
| It is owned by Microsoft Incorporation. | It is also owned by Facebook, Inc. |
| It was launched on August, 2003. | It was launched in 9th Aug 2011. |
| In Skype you have to add or accept contacts before messaging. It prevents strangers fron sending you unwanted messages. | In Facebook Messenger anyone can message you. |
| Skype allows to share documents. | Facebook Messenger does not allows to share documents. |
| In Skype you can see when a person was last active. | There is no such option in Facebook Messenger. |
| Skype allows to share music files. | Facebook Messenger does not allows this. |
| Skype does not allows to personalize the appearance of the app like choosing a different theme or colors. | Facebook Messenger allows to personalize the appearance of the app like choosing a different theme or colors. |
| In Skype you cannot share your location. | In Facebook Messenger you can share your location. |
| In Skype there is no media library that contains all uploaded files. | In Facebook Messenger there is a media library that contains all uploaded files, making search easier and helping you organize the content. |
| In Skype there is no Facebook sign-in option. | In Facebook Messenger there is Facebook sign-in option. |