Telegram API - We offer two kinds of APIs for developers. The Bot API allows you to easily create programs that use Telegram messages for…
TapTalk.io - TapTalk.io is a complete in-app chat SDK and messaging API - Easy integration and customizeable.
TDLib - Build your own Telegram
Chat by Stream - Build and ship in app messaging in a few hours
MirrorFly - World's Most Scalable Voice, Video & Chat SDK for Small, Medium & Enterprises
WeChat API - WeChat API and SDK allow developers to access and integrate the functionality of WeChat with other applications.