What Smart Dimmer switch?

As per thread title, what smart dimmer switch do you use in your house?

I want one that’s fully compatible with LED bulbs (I will have GU10 LED almost everywhere)
It needs to be controllable form OpenHAB too and then via Alexa, through OpenHAB.

I don’t want to go the smart bulb route, I would like to use cheap dimmable LED bulbs.

I am using re-flashed SonOff units for simple on/off and RGBW, I don’t want to spend a fortune on the dimming units.