The echo is a fantastic option for voice control and there is an official SmartThings integration, so I think they’ve covered themselves fine there.
I use both Echo and Siri for voice Control, but echo for preference every time as the far field recognition is just amazing.
Since smartthings has an IFTTT channel, there is a third option as well which works particularly well with a smart watch, and that’s to send a voice text to IFTTT and trigger the SmartThings channel that way. I used that before the echo integration was available. But you can also use it with either hey Siri or hey Google on a smart phone.
There are also several other ways to add voice control to smartthings. See the following thread.
