Top 357 messaging open source projects

⚡️ A framework for building conversational user interfaces.

Anonymous peer-to-peer instant messaging

qTox is a chat, voice, video, and file transfer IM client using the encrypted peer-to-peer Tox protocol.

JSON-RPC 2.0 implementation over WebSockets for Node.js and JavaScript/TypeScript

Spring Cloud event bus

Distributed Application Framework for .NET

An asynchronous messaging library, written in JavaScript, for node and the web browser

Android library. Flexible components for chat UI implementation with flexible possibilities for styling, customizing and data management. Made by Stfalcon

Framework for automated integration tests with focus on messaging integration

Javascript and Typescript Stomp client for Web browsers and node.js apps

Java client for NATS

Vonage API client for Node.js. API support for SMS, Voice, Text-to-Speech, Numbers, Verify (2FA) and more.

Eclipse Hono™ Project

The most beautiful SMS messenger for Android

🌟🌟🌟🌟🌟 Falcon Messenger is a Fast and Beautiful cloud-based messaging app. With iOS and IPadOS Support. Available on the App Store.

A small, feature complete Clojure client for RabbitMQ that embraces AMQP 0.9.1 model

The next generation messenger.

A curated list of services and alternatives that respect your privacy because PRIVACY MATTERS.

An observable microservice bus library for .NET, that wraps the underlying message transports in simple Rx based interfaces.

PHP Service Bus (publish-subscribe pattern) implementation

ChatSecure is a free and open source encrypted chat client for iOS that supports OTR and OMEMO encryption over XMPP.

Official Franz Plugin Repository

Official iOS SDK for Stream Chat

File sharing program using DC and ADC protocols

An implementation of the Wickr Secure Messaging Protocol in C

An open source, a high-performance hybrid integration platform that allows developers quick integration with any application, data, or system.

a modern Tox client for the GNU/Linux desktop

Stream Chat official Flutter SDK. Build your own chat experience using Dart and Flutter.

Apache Heron (Incubating) is a realtime, distributed, fault-tolerant stream processing engine from Twitter

A simple bot framework for Signal

Apache Pulsar NodeJS Client

A mildly opiniated modern cloud service architecture blueprint + reference implementation

Java Library for Distributed Services

Kafka Flow Retry Patterns Extensions

Live Chat Widget built with Firebase and Angular4 for customer support .

Tracing instrumentation for Apache Pulsar clients.

Holodeck B2B is an AS4 system-to-system messaging solution that implements the OASIS specifications for ebMS3 and it's AS4 profile. For more information visit the project website

Messaging APIs for multi-platform

Research and specification for Big Brother protocol

An ASP.NET Core middleware for Wechat/Weixin message handling and apis. (微信公众平台/接口调用服务)

Amazon SNS (Simple Notification Service) - Code Samples

Mirror of Apache Qpid JMS

An inprocess eventbus for highly concurrent Python applications

Ready-to-use Chat UI Components for Swift (iOS)

Sample code of application examples to build microservices with converged Oracle database and multi-cloud / hybrid cloud services

🐑 Decentralized chat with private messages and rooms. Messages and files are encrypted using RSA

☁️ Plugins for the .NET Standard client library for Azure Service Bus

Mirror of Apache Qpid Proton-J

UDP Transport: compress, encrypt and send any data reliably over unreliable UDP connections

Open-source Voice & Video Calling and Text Chat App for Swift (iOS)

Event Sourcing and Microservices Stack for Ruby

Fast, reliable UDP messaging for Java. Designed for games.

Dione is an anonymize and encrypted messaging system build on top on a peer to peer layer.

A re-imagining of the iconic BBS software.

iGap Core Messaging offer Open APIs for developers . This API allows you to build your own customized iGap clients.

Modular p2p messaging stack, with a focus on secure messaging.

A simple HTTP/NATS server to host JWTs for nats-server 2.0 account authentication.

Protobuf definitions for the Liftbridge gRPC API. https://github.com/liftbridge-io/liftbridge

UNIX compatible, Discord and Telegram inspired, Pokémon-themed instant messaging service.

Mirror of Apache Qpid Dispatch