I don’t have any smart speakers or hubs, but I have several smart lights, outlets, and thermostat that I can control with the Alexa app on my laptop and my phone. I can also control them with the Google assistant on my phone by saying “Hey Google” or “Alexa”. The smart lights are from 3 different manufacturers, and the smart outlets are from 2 different manufacturers, which control lights, security cams, and a portable fan. On my Alexa app device list is also an Amazon Fire TV Stick, but I can’t get Alexa or Google Assistant to control it.