This episode of "How I Built This" features an interview with Patrick and John Collison, the founders of Stripe, a payment processing company. The episode explores their upbringing in rural Ireland, their early interest in coding, and the founding of their first company, Octomatic. The Collison brothers discuss the challenges they faced in creating Stripe, including navigating the complexities of the financial system and convincing investors of their vision. They explain how Stripe differentiated itself from existing solutions like PayPal by focusing on developers and providing a simple, elegant way for businesses to accept payments online. The interview also touches on the company's growth, its valuation, and the competitive landscape, as well as a short segment about another entrepreneur's experience dealing with counterfeit products.