A seventh-grade friendship, a Soho apartment and $700 from a dinner party became a nationwide business. Fifteen years later, Danielle Duboise is learning that a founder's most consequential move may be stepping back without stepping away.

Apple made elegant computers for desks. Greg McGraw helped stack them by the thousand, turning an awkward hardware rule into the foundation of MacStadium.

A compliance crisis taught Niji Sabharwal where insurance software breaks. He and Jenn Knight spent seven years turning that lesson into AgentSync - then he chose to hand the CEO job to a different kind of operator.