DeviceHive

DeviceHive is another feature-rich Open source IoT platform distributed under Apache 2.0 license. The DeviceHive is free to use and change. It provides Docker and Kubernetes deployment options. You can download and use it with both public and private clouds and also can scale from a single virtual machine to an enterprise-grade cluster. It can connect to any device or hacker board via REST API, WebSockets, or MQTT. You can even connect such low-end wi-fi enabled devices as ESP8266.