Casper, the online bed-in-a-box creator we called out as a startup to watch, has become a $100 million company in less than two years.

Casper, the online bed-in-a-box creator we called out as a startup to watch, has become a $100 million company in less than two years. After testing hundreds of mattress types, the brand settled for one patented model that can be delivered in a box “the size of a dorm refrigerator.” Along with a 100-day free trial for testing, Casper emphasizes personalized customer service to build long-term relationships, and has 15,000 passionate customers who have been a part of product development. What started as an attempt to disrupt the $14 billion mattress industry has quickly snowballed into a brand that aims to be the Whole Foods of sleep. (Inc.)