Looking for a co-founder? Don’t draw from this pool

When people choose their cofounder, it’s rarely scientific. They’re guided by trust, and trust is easiest to find in familiar places: former coworkers, college classmates, close friends, people who already sit in your orbit. While starting a company is chaotic enough without bringing strangers into the mix, I wanted to understand whether this instinct toward familiarity actually comes with a cost. Turns out it does. Having worked with hundreds of early-stage startups as founders and investors, including at Coatue, Kleiner Perkins, and NFX, we wanted to test whether the instincts founders us...