MQTT stands for MQ Telemetry Transport. It is a lightweight publish/subscribe messaging protocol designed for constrained devices and low-bandwidth, high-latency or unreliable networks, ideal for the connected IoT devices and mobile applications where bandwidth and battery power are at a premium.
Solace Message Routers natively support the OASIS MQTT 3.1.1 standard to meet the needs of connected devices and mobile applications that need an efficient way to send and receive information that requires very little bandwidth, client-side processing power and/or bandwidth.
Solace PubSub+ message brokers work with any third-party MQTT3.1.1 compliant client API, including open source APIs available via an Eclipse initiative called Paho.
You can learn more about how PubSub+ supports Paho here: