Ringby Jamie Siminoff
Jamie Siminoff built Ring, a WiFi-enabled smart doorbell with a camera, starting from a personal problem he couldn't hear his doorbell. The company grew to $480 million in revenue by 2017 with triple-digit growth rates, despite being cash-flow negative due to rapid scaling. After nearly losing the deal to Amazon due to an ADT lawsuit injunction, Siminoff settled the suit, and Amazon acquired Ring for $1.15 billion in December 2017, just weeks after the legal cloud lifted.
Hardwareword-of-mouthsubscriptionvia My First Million