Instant Messaging vs Text Messaging

Summary: 

Difference Between Instant Messaging and Text Messaging is that text messaging, also called SMS, is a capability that allow users to send and receive short text messages, typically fewer than 300 characters, on a phone or other mobile device or computer. 

Instant messaging (IM) is a real-time Internet communications service that notifies you when one or more people are online and then allows you to exchange messages or files or join a private chat room with them.