Sebastian Siemiatkowski

Sebastian Siemiatkowski co-founded Klarna in 2005 while still a student at the Stockholm School of Economics, driven by the frustration of observing European e-commerce merchants lose sales due to the lack of accessible consumer credit options. His defining founding philosophy was that payment friction was the single largest barrier to online retail growth, and that by assuming the credit risk himself, he could unlock massive economic value for merchants who were otherwise paralyzed by the fear of non-payment.

Sebastian Siemiatkowski has served as the Chief Executive Officer of Klarna since its inception, guiding the company from a dorm-room invoice factoring startup to a global digital bank processing over $127 billion in annual volume. Known for his intense focus on unit economics and operational efficiency, Siemiatkowski led the company through the catastrophic 2022 valuation crash, making the unpopular but necessary decision to reduce the workforce by 40% to ensure the company's survival. He is a vocal advocate for the integration of artificial intelligence in financial services, famously claiming that AI could replace the majority of the company's customer service roles, though he later demonstrated operational flexibility by rehiring human agents when consumer data dictated the need for a hybrid approach. Siemiatkowski remains the public face of Klarna, frequently engaging with regulators and the media to defend the Buy Now, Pay Later model against accusations of encouraging reckless consumer debt.