Matrix & XMPP

Open-source instant messaging server

Replaces WhatsApp, Slack

Glossy Matrix client for the web and desktop

Replaces Slack, Discord

Robust, scalable XMPP messaging server

Replaces Slack, WhatsApp

Second-generation Matrix homeserver written in Go

Replaces Slack, Discord

Reference homeserver for the Matrix network

Replaces Slack, Discord

Simple, elegant and secure Matrix client

Replaces Slack, Discord

Web-based XMPP/Jabber chat client

Replaces Slack

Real-time collaboration XMPP server written in Java

Replaces Slack, Microsoft Teams

Cute, cross-platform Matrix messenger

Replaces WhatsApp, Telegram

Modern XMPP chat client for the desktop

Replaces Skype, Slack

Desktop Matrix client with native Qt interface

Replaces Slack, Discord

Simple, fast and reliable chat server powered by Matrix based on

Replaces Conduit, Dendrite

Simple, fast and reliable Matrix homeserver in Rust

Replaces Slack, Discord

Advanced and flexible IRC bouncer

Replaces IRCCloud

Social and chat platform built on XMPP

Replaces Facebook, Slack

Matrix-WhatsApp puppeting bridge

Replaces WhatsApp official client

Scalable, robust XMPP messaging platform

Replaces Slack, WhatsApp

Terminal-based Matrix client written in Go

Replaces Slack, Discord

Console-based XMPP client inspired by irssi

Replaces Slack

Always-online web IRC client you can self-host

Replaces Slack, IRCCloud

Privacy-focused Matrix client built with Flutter

Replaces WhatsApp, Discord

Encrypted group video calls on Matrix

Replaces Zoom, Google Meet

Second-generation Matrix homeserver written in Go

Replaces Slack, Discord

Next-generation fast Matrix client for mobile

Replaces WhatsApp, Signal

GNOME-native Matrix messaging client

Replaces Slack, Discord

Plugin-based bot framework for Matrix chat rooms

Replaces Slack bots

JavaScript XMPP client for the browser

Replaces Slack

Web client for Matrix

Python library for building Matrix clients and bots

Replaces Slack bot SDK

Community-maintained Rust Matrix homeserver

Replaces Slack, Discord

Bridge connecting Signal messaging to Matrix

Replaces Signal

Secure desktop XMPP client with OTR encryption

Replaces Skype

Full-featured XMPP client with plugins

Replaces Skype, Slack

Matrix-Discord puppeting bridge

Replaces Discord official client

Element-based Matrix client with extra usability tweaks

Replaces Slack, WhatsApp

Web admin interface for Synapse Matrix homeservers

Admin UI for Matrix homeservers

Lightweight C implementation of the XMPP server

Replaces Slack

Moderation bot for Matrix communities

Replaces Discord moderation bots

High-performance Matrix homeserver written in C++

Replaces Slack, Discord

Highly scalable XMPP/Jabber messaging server

Replaces Slack, WhatsApp

End-to-end encryption-aware Matrix reverse proxy

Standalone sync proxy enabling fast Matrix clients

Matrix-Slack bridge application service

Replaces Slack official client

OAuth2 and OIDC authentication service for Matrix

Pure-Python XMPP client library and toolkit

Replaces Slack bots

Console XMPP client modeled after IRC clients

Replaces Slack

XMPP-to-anything puppeteering bridge framework

Replaces Beeper, Matrix bridges

Reference push notification gateway for Matrix

Replaces Firebase Cloud Messaging

Lightweight, fork-based XMPP communication server

Replaces Slack, WhatsApp

Reconciliator and gateway for managed Matrix homeservers

Replaces Slack admin tools

Plugin adding live chat to PeerTube streams

Replaces Twitch chat

Cross-platform Matrix client built with Flutter

Replaces Discord, Slack

Privacy-focused XMPP messenger for Android

Replaces WhatsApp, Signal

Command-line tool to send XMPP messages

Replaces Slack incoming webhooks

Beginner-friendly framework for Matrix bots

Replaces Slack bot framework

Meetings and messaging plugin for Openfire

Replaces Zoom, Slack

XMPP client for team messaging

Replaces Discord, Facebook Messenger

Well-maintained fork of the Conduit Matrix homeserver

Replaces Slack, Discord

Modern XMPP communication server