Cleepbus allows Cleep devices to communicate each other.
It is based on the great 0MQ open source messaging library.
Unlike other solutions that use MQTT solution for IoT communication, Cleep needs a network without a critical central point like the MQTT broker.
Thanks to a specific 0MQ implementation, Cleep implements a mesh network.
One of Cleep requirement was to use the same way of communication between devices and desktop application used to configure devices. Using a broker would have required its installation on final user computer while 0MQ is directly embedded in Cleep software.
Of course it doesn't mean MQTT is not supported in Cleep. A specific application will be available to allow communication with other market devices that use MQTT.