Instant messaging platform. Backend in Go. Clients: Swift iOS, Java Android, JS webapp, scriptable command line; chatbots

bridge between mattermost, IRC, gitter, xmpp, slack, discord, telegram, rocketchat, twitch, ssh-chat, zulip, whatsapp, keybase, matrix, microsoft teams, nextcloud, mumble, vk and more with REST API (mattermost not required!)

Robust, Ubiquitous and Massively Scalable Messaging Platform (XMPP, MQTT, SIP Server)

Event-driven networking engine written in Python.

Jitsi is an audio/video and chat communicator that supports protocols such as SIP, XMPP/Jabber, IRC and many other useful features.

Web-based XMPP/Jabber chat written in JavaScript

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

An XMPP server licensed under the Open Source Apache License.

Tsung is a high-performance benchmark framework for various protocols including HTTP, XMPP, LDAP, etc.

A modular and portable open source XMPP client library written in Java for Android and Java (SE) VMs

Modern XMPP ("Jabber") Chat Client using GTK/Vala

XMPP for JavaScript

Movim - Decentralized social platform

Open-source XMPP client for Android

MongooseIM is Erlang Solutions' robust, scalable and efficient XMPP server, aimed at large installations. Specifically designed for enterprise purposes, it is fault-tolerant and can utilise the resources of multiple clustered machines.

Chat SDK Android - Open Source Mobile Messenger

Ncurses based XMPP client

Strophe.js is an XMPP library for JavaScript

💬 Instant messaging server for the Extensible Messaging and Presence Protocol (XMPP).

JavaScript-based multi-user chat client for XMPP.

Modern XMPP, with a JSON API

【停止维护】基于Xmpp协议的即时通讯社交软件(客户端+服务端)Open source one last year to write their own Xmpp based on the agreement of the instant messaging social software (client + server)

Chat SDK iOS - Open Source Mobile Messenger

:speech_balloon: Real-time xmpp chat application with video calls, file transfer and encrypted communication.

An Adapter-based Bot Framework for Elixir Applications

IMPORTANT: due to a drive failure, as of 13-Mar-2021, the Mercurial repository had to be re-mirrored, which changed every commit SHA. The old SHAs and trees are backed up in the vault branches. Please migrate to the new branches as soon as you can.

Monal for XMPP (iOS and macOS)

coyim - a safe and secure chat client

Cross-platform real-time collaboration client optimized for business and organizations.

Kontalk official Android client