At NFX, we dig into network effects companies and their founding stories, so we emailed Craig Newmark, the founder of Craigslist.

Craigslist is the purest example of a 2-sided network effect and has remained stronger than ever for the past 20+ years. NFX partner James Currier had a chance to sit down with Craig to talk and catch up.

Craig handed over the operations of Craigslist in 2000 and is now more focused on his philanthropy, but when we catch up, we get to discuss his mental models for business and for life. Just like the product he built, his secret to success is simple - treat others the way you want to be treated and put service above all else.