35
ZHA or Zigbee2mqtt
(lemmy.ml)
Home Assistant is open source home automation that puts local control and privacy first. Powered by a worldwide community of tinkerers and DIY enthusiasts. Perfect to run on a Raspberry Pi or a local server. Available for free at home-assistant.io
I use ZHA. As I have a Pi, I prefer the less addons the better, and there are ZHA devices for everything. It simply narrows down the spectrum, but overtime it's coming closer and closer to Z2M in terms of device support and features... So...
There is also Matter and Thread on the horizon, so I wouldn't bother complicating things further.