openHAB is described as 'Java-based open-source home automation platform that integrates and combines a vast range of different smart home systems and technologies into one single solution' and is a very popular Home Automation tool in the bitcoin & cryptocurrency category. There are more than 50 alternatives to openHAB for a variety of platforms, including Linux, Android, Mac, Windows and iPhone apps. The best openHAB alternative is Home Assistant, which is both free and Open Source. Other great apps like openHAB are ioBroker, Homebridge, Domoticz and SmartThings.