Chat SDK (IM SDK) — Build in-app messaging with chat API, UIKit & send message capabilities. Supports Android, iOS, Flutter, Web, React Native, uni-app, HarmonyOS & more. Features: one-to-one chat, group chat, message push, real-time messaging, offline push, chat UI components.

Chat SDK Android - Open Source Mobile Messenger

💬 Android Chat SDK ➜ Stream Chat API. UI component libraries for chat apps. Kotlin & Jetpack Compose messaging SDK for Android chat

💬 React-Native Chat SDK ➜ Stream Chat. Includes a tutorial on building your own chat app experience using React-Native, React-Navigation and Stream

Flutter Chat SDK - Build your own chat app experience using Dart, Flutter and the Stream Chat Messaging API.

💬 iOS Chat SDK in Swift - Build your own app chat experience for iOS using the official Stream Chat API

Chat SDK iOS - Open Source Mobile Messenger

React Chat SDK ➜ Stream Chat 💬

Open-source engine for chat 💬, AI assistants 🤖 & wallets 🪪. React, Typescript, Python, XMPP. Build future apps with chat, AI agents and web3.

SwiftUI Chat SDK ➜ Stream Chat 💬

Tinode chat client application for Android

Build chat in minutes with Sendbird UIKit open source code.

JS / Browser Client - Build Chat with GetStream.io

A plug and play modular toolkit for integrating the Chat feature on top of Firebase!

Sendbird UIKit for iOS is a development kit with a user interface, offering a simplified integration into chat.

TalkJS (https://talkjs.com) examples

A Flutter Chat application, for android, ios and web platform, using Firebase for Google Sign In/Sign Up and exchange text, emoji and images, include user online feature

Build chat in minutes with Sendbird UIKit open source code.

Kommunicate.io Android Chatbot SDK

💬 Angular Chat SDK ➜ Stream Chat. Build a chat app with ease.