You’ve all heard the story of Jamie Siminoff, creator of Doorbot, later renamed Ring, who was infamously rejected on national TV on SharkTank, but then went on to create a wildly successful business. You’ve all heard the story of Jamie Siminoff, creator of Doorbot, later renamed Ring, who was infamously rejected on national TV on SharkTank, but then went on to create a wildly successful business.