Aqara just launched a new set of in-wall smart switches for the US market. In my tests they look to be a competitively priced and compelling option, especially if you are trying to find smart switches for an older home. With the option to get a switch without a neutral wire, and two switches in one, this product will fit a lot of peculiar switch boxes.
Available now on Amazon (affiliate links):
Smart Wall Switch (No Neutral, Single Rocker)