When you’re building a startup, you’ve got a lot to figure out. How do you know if an idea is a good one? Do you need a co-founder? How do …

To help you make a startup that matters, it helps to have people who have been in the idea maze — trying to get product-market fit, finding it, and holding …

Where does your story begin? In Your Life: The Movie, what’s the opening scene? For Tracy Young, it might start years before she co-founded PlanGrid — a company she’d later …

Every batch, we invite founders to advise YC companies as Visiting Group Partners. These advisors bring valuable insights and recent operational experience to YC’s early-stage companies. Throughout the batch, they …

Curtis Fonger and Matthew Busel met on YC’s Co-Founder Matching (CFM) Platform, a tool we built to help co-founders find each other. Even in early conversations, their fit as co-founders …

Y Combinator runs a website where we help people find potential co-founders. While running that, we’ve had a lot of people ask for a set of questions to help figure …