Best Smart Vents?

I prefer to stay away from Hubs and try to control everything through WiFi. I had put this off too, long, an old drafty home I would like to dynamically open and close vents to use less energy keeping us warm/cool wherever we happen to be.

I understand Keen or Flair are good brands… what are considered the best with regards to Home Assistant? Are their other brands that are compatiblke with HA? - especially any company that can make custom ones in a variety of styles?

Thanks for the feedback! I am trying out Flair…