Google Home and most recently Amazon’s Alexa can tell whose voice is talking to it so it can respond to the right person, making the voice assistants even more personally tuned.

Around 11% or so of U.S. consumers own an Amazon Echo or Google Home, making the percentages relatively small but the numbers high. For example, 15 million Amazon Echo devices were sold just last year, according to Parks Associates.

From the article "Smart Light Bulb Owners Turn To Amazon Echo, Google Home" by Chuck Martin.