Y Combinator Startup Podcast

Stripe, Airbnb and Lyft are a few of the most successful companies of the past decade. And there are at least two things they all have in common - great design, and Katie Dill. Katie was Head of Experience Design at Airbnb, led the design team at Lyft and is now Head of Design at Stripe. We spoke with Katie about her design philosophy, what sets companies like Stripe apart, and how important it is to instill a culture of design in your startup from day one.

Building a startup and trying to break into an established market is very difficult, especially if you’re trying to do it alone! That’s why it’s critical to find the right co-founder for the journey. In this episode of Startup School, YC Group Partner Harj Taggar explains why you need a co-founder, when to bring them on, where you can find one and how to maintain the relationship.

Whether it's for sales, recruiting or making new connections, cold outreach is a necessary tool for helping build your startup. But as you probably know, most cold emails either are ignored or end up in the trash. So what can you do to make sure your emails break through the noise? In this episode of Startup School, YC Group Partner Aaron Epstein shares expert advice on how to write cold emails that have all the right ingredients to get noticed and convert new customers.

At YC our motto is make something people want. But how do you actually know if you’ve accomplished that in the early days? One of the best ways to measure successful growth is a concept called cohort retention, which tracks the fraction of new users that come back time and time again to use your product. In this episode of Startup School, YC Group Partner David Lieb explains how to define cohorts, track active users and determine the appropriate time frame for measuring successful retention rates.