Interesting. I looked at their site, some pretty expensive items. How 'cloud based' dependent is this system? I noticed they have a 'caller' service that you have to have a service for. Can the system do notifications of this nature on its own?
It can get expensive. It can get too proprietary if you go with their tree devices. My home is under construction so I don't have a lot of experience with it yet. I decided to not go their proprietary way. I'm using DMX for dimming and another solution for switch input (events can be fed into what they call virtual inputs over ethernet); my Loxone setup will be a MiniServer as the "master controller" and a DMX Extension, nothing more. (And to be honest, I will likely replace even that with a custom solution in the future.)
I don't intend to use any of their cloud services. Its trivial to use virtual outputs to push events out over ethernet. There is a customization language (PicoC). I know there are alternatives to their weather service and I'd be surprised if there weren't alternatives for the other services including notifications and email.
One thing to be aware of is that they don't have the certifications to be a full blown alarm panel or smoke alarm in the USA. I'm going to interface to a dumb (and cheap) DSC or Honeywell panel. They also make a big deal about their HVAC control capability but it only works with older dumb systems with the traditional thermostat wiring - no direct support for the many modern "smart" HVAC systems and their proprietary control interfaces.
All of these systems have their pros & cons. As a software engineer with a moderate background in electronics, I'm not completely happy with any of the options in the market. My decision is basically the "least undesirable". I've already implemented my own "smart" switch system (see Advanced Central Switch Interface) and when I have more time available I will probably implement an entirely custom replacement for Loxone. Some people are looking at Node-Red as a potential graphical programming environment.
There is a Loxone Forum if anyone is interested.