I would suggest to go with home assistant. I have been running it for couple of years now and I am very happy.

I would also suggest to purchase a Home Assistant Green. While not needed, you can self install on a Pi or a standard pc, it’s a small price to support the project and the Green is a nice solid and super stable piece of hardware, I am very happy with it after using first an old laptop, and then a Pi. The green is a clear upgrade from both.