Eclipse Mosquitto is described as 'Open source (EPL/EDL licensed) message broker that implements the MQTT protocol versions 5.0, 3.1.1 and 3.1. Mosquitto is lightweight and is suitable for use on all devices from low power single board computers to full servers' and is an app in the education & reference category. There are more than 10 alternatives to Eclipse Mosquitto for a variety of platforms, including Linux, Windows, Mac, Self-Hosted and SaaS apps. The best Eclipse Mosquitto alternative is RabbitMQ, which is both free and Open Source. Other great apps like Eclipse Mosquitto are Apache Pulsar, Amazon Simple Queue Service, HiveMQ and MQTTBox.