Fortt Knox

You've probably heard of TaskRabbit – the online service lets you pay a contractor to run an errand, clean an apartment, put together an Ikea bookshelf – any number of odd jobs. Before there was Uber or Airbnb, TaskRabbit birthed the so-called "gig economy." You might not know that Kevin Busque co-founded TaskRabbit with his wife, Leah, who he is quick to admit was the brains behind the operation all along. In an unusual twist on the typical Silicon Valley story, Kevin and Leah were high school sweethearts, married right after college. They worked at the same company more than once, bootstrapped a business together, and eventually moved across the country to realize the Silicon Valley dream. Leah served as CEO of TaskRabbit for years, and is now executive chairman. Kevin recently launched a new venture, Guideline, a 401(k) platform.