Table 2.

Comparison of the most relevant open-source home automation platforms.

System	Development Language	API	Other Features
OpenHAB	Java	Representational state transfer (REST)	web interface, many protocols, many plugins, MQTT, EPL v1 license, extensive documentation
HomeAssistant	Python	REST/Python/Websocket APIs	web interface, many protocols, many plugins, MQTT, Apache 2.0 license, extensive documentation
Domoticz	C++	JSON based	web interface, many protocols, many plugins, MQTT, GPL v3 license, extensive documentation
Calaos	C++	JSON based	web interface, a few protocols, under development plugins, MQTT, GPL v3 license, extensive documentation (in French)
Jeedom	PHP	JSON RPC and HTTP based	web interface, many protocols, many plugins, MQTT, GPL v2 license, extensive documentation (in French)
Fhem	Perl	ASCCII commands	web interface, many protocols, many plugins, MQTT, GPL v2 license, extensive documentation (in German)
qToogle	Python	JSON based REST	web interface, many protocols, a few plugins (undergoing continuous development), Hypertext Transfer Protocol (HTTP) based messaging, Apache 2.0 license, extensive documentation (in English on Github)