Chat software also known as an instant messaging application or a chat application is an app that helps users to communicate with each other in real time in web chat rooms. Also, a chat app can be used either on a web browser or a smartphone and helps users to send instant messages, audio, or voice calls to anyone around the world, just like they would do in person.
And these days, businesses or organizations are using customizable chat SDKs to quickly build a personalized self-hosted chat solution so that they can include features they need, take full control of the app data, and host apps on their own premises.
Examples of some chat applications are FB, WhatsApp, WeChat, and Slack.