OK, I thought we were talking about complete systems that had hardware interfaces as well.
If you are looking for just home automation only and running an interface on a phone or tablet, then there are a few options. They are still a bit science project like. But they do work.

Home Assistant
Loxone
Hubitat
Seems I'm not remembering some.

Josef, you keep mentioning lots of 'good' options out there. But you are not naming a single one. If you actually know of some good ones, by all means post it. Because me a lot of other integrators on this forum have never seen them. Maybe we can debate about what you consider good options.