[Solved] Best Wireless Smart Home Systems for Finished Houses Without Fibaro

Hello.
I'm buying a finished house and don't have the option to lay a dedicated installation, so only a wireless system remains.
Can you suggest any manufacturers so I can check what they offer?
I liked the Fibaro solutions, but there was a topic on the forum a few years ago where this system was described negatively. But a lot may have changed over those few years.

@szeryfff Nothing is known about your eyesight, how many points, whether just relay switches or also dimmers, flow/smoke detectors, pairing this with cameras, alarm system etc.

Sorry, I am already adding more details.
The house we bought is already practically finished, there is no wiring for the alarm system and for smart appliances and it is no longer possible to lay such an installation.
The house consists of a ground floor (garage, living room, kitchen, bathroom and boiler room), a first floor (mezzanine only, no rooms, but there are windows on two walls) and a second floor (3 rooms and a bathroom).
In the house I want to install a video intercom with gate control (the installation will be laid), an alarm and make at least a substitute for a smart home (control of lighting - also dimmers, power sockets - but not all, roller shutters, gas heating). I haven't thought about cameras yet, but it is possible that I will install one in the near future.
I will be installing a Satel alarm. I know you can do something like an alarm on Fibaro, but it's probably better to have a dedicated one. I know you can do a smart home on a Satel control panel, but I've done a bit of reading about it and I'll forgo that option.
I would also like to be able to control everything from my phone/tablet.

The Fibaro Home Centre alone is more than 2k, plus Relay switches and dimmers priced at approx. 250PLN/unit - with these requirements you may be able to fit in 10k, not counting the alarm system.

Yes, I know that, but I don't need to do everything at once. Plus there's the alarm, which I'll have to start with.
I was wondering whether to deploy the Satel detectors only on the ground floor, and use Fibaro (or other) detectors on the other floors for possible alarm activation. The idea is to minimise costs, but also so that these detectors are not crammed on every wall. I know that Satel detectors can be used for scenes, but this introduces limitations as they don't have a light sensor or temperature sensor.

The question is, is Fibaro the best option in my case? There is also Grenton, but they seem to be more geared towards a wired system.

Fibaro is not an alarm system, why should there be loads of them on every wall? It's all a matter of proper placement.
There is Grenton, there is F&F, you can also read about Supli....

I suggest Supla. I have personally and am satisfied. The system works stably and only requires internet to manage points.

In the end I went with Home Assistant. Integrated Satel control panel and masses of sensors on wifi/zigbee.