HA and Hubitat are both internet-less home automation solutions. I am a big Hubitat user and no internet needed to control devices that are in the home using Z-Wave, Zigbee or WiFi. But… if you wanna use voice control like The Goog nor Amazonia, then internet link required. Also things like your thermostat, add-on for a mini-split like Cielo and many other WiFi enabled devices do require talking to the mother ship over the internet. Generally if it is Z-Wave or Zigbee, no internet needed and you can use your phone or iPad on local WiFi to control it with a dashboard as I do with Hubitat. We had a 4 day power outage and my smart home was still smart once I got the generator going… minus internet needed things. HA does have a voice option, but it is immature at this point.