39. Philip Krim, Jeff Chapin, Gabe Flateman, Luke Sherwin, and Neil Parikh

Cofounders, Casper

In June, mattress-delivery startup Casper raised another $55 million in a series B funding round led by Institutional Venture Partners, with other investors including Leonardo DiCaprio, Tobey Maguire, and Adam Levine. In total, the mattress delivery startup has raised $70 million in venture-capital funding, and has plans to expand.

Casper’s based on a simple idea: Make buying a new mattress an easy, pain-free process. Customers choose a size online (ranging from twin to California king), and Casper delivers the compressed memory foam mattress straight to your door in a box no bigger than set of golf clubs, streamlining both the delivery and assembly processes. The plan is working too — Casper generated $1 million in sales in its first month after the site launched in 2014.