What are some alternatives?
When comparing ioBroker and openHAB, you can also consider the following products
Home-Assistant.io - Home Assistant is an open-source home automation platform running on Python 3.
Google Home - Set up, manage, and control your Chromecast, Chromecast Audio and Google Home devices.
Home - Securely control all your HomeKit accessories from your favorite iOS device.
Domoticz - Domoticz is a lightweight Home Automation System
Jeedom - Jeedom is a complete home-automation software.
FHEM - FHEM (TM) is a GPL'd perl server for house automation.