Siri, Alexa, Hey Google, IFTTT overview (2020)

Takeaway: Alexa most popular, must have, IFTTT basically, too, as Alexa and Google missing real automation. Eve demonstrates a laser sharp focus on the Apple ecosystem.

 AlexaIFTTTGoogleHomeKit/Siri
Arlo
Hue
Kasa (TP-Link)
Gardena 
Netatmo
Logitech Circle
August✔*
WeMo (Belkin)
Ring 
Wyze✔* 
Home Connect (Bosch/Siemens) 
SmartThings (Samsung) 
Blink  
Sonos 
Eve   
IKEA 
Abus   
LupusSec   
Homematic IP   
Magenta SmartHome  
* = not localized for Germany