Domoticz

these Wifi wall-plugs are cheaper than Z-wave types:
https://www.banggood.com/search/wall-sw ... html?sbc=1
They claim to work with Alexa/Google

What is your experience? Do they work with native Domoticz?

They don't work natively with Domoticz as they rely on a Chinese cloud service. They have an ESP8266 inside so they can be flashed with ESPeasy like a Sonoff can and then they are supported. You will need to dissassemble and even desolder a daughterboard to flash so it's a bit of effort but it can be done. For a look at the guts, see:

https://github.com/xoseperez/espurna/wi ... -NAS-WR01W