http://www.techradar.com/news/amazon-echo-is-three-times-as-popular-as-google-home-says-new-sales-research

The smart speaker market has gone from strength to strength over 2017, with loads of new devices and brands entering the fray. But when it comes to pure sales, it appears that a clear leader is emerging, and that's Amazon.

According to Consumer Intelligence Research Partners, Amazon's Echo devices are shipping at a rate of three to one when compared to its nearest rival, Google Home. According to the report, that puts sales at an estimated 20 million for the Amazon Echo range, versus 7 million for Google Home.