https://www.cnbc.com/2017/09/27/amazon-has-5000-people-on-echo-and-alexa-more-than-fitbit-and-gopro.html

Amazon's Alexa voice technology is being used in a bunch of new hardware devices, including an upgraded Echo, a box for making phone calls and even in some upcoming BMW cars.

To develop all of that technology, Amazon has quietly assembled a team of over 5,000 people working on Echo and the Alexa ecosystem, Amazon's hardware chief Dave Limp said during an event on Wednesday.