Smartphones Startups

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.

Doorman is an on-demand package delivery service founded by Xander Adel, a former Pixar technical director, that solves last-mile delivery problems by allowing customers to schedule package arrivals at convenient evening hours (6 PM to midnight). By 2016, the company had raised over $3 million, built a team of 10, and delivered over 100,000 packages across three markets (San Francisco, Chicago, and New York) with both direct-to-consumer and retail partnership models.