Amazon Ring’s founder is back as CEO with a hard pivot to AI. How Jamie Siminoff went from ‘Shark Tank’ reject to $1 billion brand

Jamie Siminoff pitched Doorbot, a smart video doorbell, on Shark Tank in 2013, but none of the Sharks saw enough potential to invest in it. Despite this rejection, Siminoff rebranded Doorbot as Ring, leveraged publicity and new investors, and ultimately sold the company to Amazon for about $1…