Flutter Chat SDK – Short Note
A Flutter Chat SDK (Software Development Kit) provides pre-built tools and APIs to help developers quickly integrate real-time messaging features into Flutter applications.
Popular Flutter chat SDKs include:

Mirrorfly – Known for fast, scalable, customizable chat UIs.

CometChat – Easy integration with features like voice/video calling.

https://www.apptha.com/blog/best-flutter-chat-sdk/