new to this forum

I am planning to buy a Netatmo system to replace my existing traditional system.
I live in an indipendent house, with indepenedent boiler (BERETTA EXCLUSIVE).
I am planning to buy a relay and 10 smart valves (one for every radiator).
The relay will be connected to the boiler in order to turn it on/off when the valves require hot water.
The question is: do I also need a thermostat?
In my opinion I don't need it, as every room will have its own temperature control.
But the question is if the system will work without a thermostat connected.
thanks for your input.