
Description: emqtt is an open-source, scalable, distributed MQTT message broker that supports a wide range of network transport protocols. It is written in Erlang/OTP and provides features such as persistent sessions, queueing, clustering, bridges and enterprise-grade security.
Type: Open Source Test Automation Framework
Founded: 2011
Primary Use: Mobile app testing automation
Supported Platforms: iOS, Android, Windows

Description: MQTTBox is an open source MQTT client tool that enables users to easily test and debug MQTT clients and brokers. It features an intuitive UI with message logging, topic subscription, and publishing capabilities for working with MQTT.
Type: Cloud-based Test Automation Platform
Founded: 2015
Primary Use: Web, mobile, and API testing
Supported Platforms: Web, iOS, Android, API