Guillaume Pousaz is a Swiss-born entrepreneur, the self-made billionaire Founder and CEO of Checkout.com, a major global payment processing platform. Born in the outskirts of Geneva, Switzerland, in 1981, his career is a blend of financial ambition and personal resilience.

Pousaz initially planned to become an investment banker, studying mathematical engineering before enrolling in economics at HEC Lausanne. His life pivoted in 2005 when his father's cancer resulted in him leaving HEC Lausanne before completing his degree. He moved to California to pursue surfing and took a job at a payments company, where he recognized the massive inefficiency of the payments industry—the genesis of Checkout.com.

Guillaume Pousaz left his job and, in 2007, started his first payments business, NetMerchant (specializing in selling European currencies to U.S. merchants). Recognizing the limitations of relying on middlemen, he founded Checkout.com in 2012 with the strategic vision of creating a payments company that used all its own technology, becoming licensed by the FCA that same year.

Under his leadership as CEO, Checkout.com achieved hyper-growth, providing high-volume payment processing for global e-commerce giants. His focus on full-stack technology, real-time data, and owning the entire payments flow (avoiding middlemen) drove the company's valuation into the billions, securing his multi-billion dollar fortune (estimated at $7.8 billion in May 2025). Pousaz is now a prominent figure in the fintech industry, known for his deep understanding of global payments infrastructure.

Guillaume Pousaz's social impact is structural, stemming from Checkout.com's role in facilitating global e-commerce and cross-border payments for thousands of businesses worldwide. His technology streamlines complex financial transactions, driving efficiency in the global digital economy.

His personal philanthropy supports various educational and community initiatives. His career provides an inspirational narrative of a founder who overcame early setbacks (dropping out due to family illness) to build a multi-billion dollar company by mastering a core financial services niche.

Guillaume Pousaz maintains the professional, high-energy style of a fintech founder. His attire is consistently modern and high-quality, favoring tailored business casual wear. His aesthetic is one of confident, disruptive authority, reflecting his engineering and economic background.

Residing in Dubai (and traveling globally), his luxury is the immense security and autonomy derived from his multi-billion dollar fortune. His life is dedicated to fintech innovation, global commerce, and his personal passion for surfing.