I need a new boiler (water heater) - are there any smart ones that can be integrated into homeassistant?

Dear community,

our 40 year old boiler (-> water heater) is end of live and I am soon going to replace it. I asked my supplier, if there is a boiler, where I can get the data into my homeassistant, but he doesn’t know.

I am living in Switzerland (-> Winterthur) and I would like to reach out to the community: what are your experiences? Did you find a boiler that easily integrates into HA without any cloud services?

The cheap solution would be to use a shelly to measure energy consumption - but that is not what I am looking for, when I have to buy a boiler in 2023.

Any Ideas or product recommendations are very welcome.

Chris