As a student at Harvard Business School, Katia Beauchamp developed a passion for shopping online. The fashionista couldn't resist chic finds like a Walter shift dress and Madewell skinny jeans on budding e-commerce curators Gilt and Shopbop. But the former commercial real estate agent, now 29, wasn't willing to buy new makeup that way. Why? When purchasing something that she applies to her skin and costs up to $1,000 an ounce, "I have to try it first," says Beauchamp.
So when it came time for the 2010 graduate to find a job, she teamed up with her best friend and business-school...