Guillaume Pousaz

Founder of Checkout.com

Guillaume Pousaz is the founder and chief executive of Checkout.com, a payments company he started in 2012 to help businesses deliver better payment experiences. Its leadership page describes a company of more than 1,600 employees in 19 countries; a later company announcement puts headcount at about 2,000 at the end of 2025.^[1][3]

Checkout.com's February 2026 results announcement says the company works with more than 1,000 enterprise merchants, among them Uber, eBay, Spotify, Temu, Pinterest, HelloFresh, ASOS and Vinted, and that 63 merchants now process more than $1 billion a year with it, up from 39 a year earlier.^[3]

Early life and education

Checkout.com's own biography says Pousaz grew up in Switzerland, was drawn to street art, technology and numbers, and was programming by the age of eight. Wikipedia gives his birth year as 1981 and places his upbringing on the outskirts of Geneva.^[1][2]

Wikipedia says he studied mathematical engineering at EPFL and then enrolled in an economics degree at HEC Lausanne, which he left in 2005 without graduating after his father's cancer diagnosis. Checkout.com's page refers to the Ecole Polytechnique and HEC Lausanne. Wikipedia adds that he had been offered a role at Citibank in London but instead moved to California to surf.^[1][2]

Early ventures, 2006 to 2012

Pousaz joined International Payments Consultants in 2006 and went on to co-found NetMerchant, a money-transfer service between the United States and Europe that operated until 2009. In 2009 he bought the Mauritius-based gateway SMS Pay, reportedly for $300,000 paid over three years, and founded Opus Payments in Singapore. Opus was rebranded Checkout.com in 2012.^[2]

Funding and valuation

Checkout.com took its first outside capital in 2019, a $230 million round at a $2 billion valuation that Wikipedia calls the largest Series A for a European fintech company. In January 2021 it raised $450 million at a $15 billion valuation, and a further $1 billion round followed in 2022. Wikipedia reports that Pousaz owns about two-thirds of the company.^[2]

In September 2025 the company announced an employee share buyback and a new internal valuation of $12 billion. The release says it employed 2,000 people across 19 offices, had exited 2024 profitably after 45 percent net revenue growth in its core business, and was targeting full-year profitability in 2025.^[4]

Recent results and strategy

Checkout.com's announcement dated February 24, 2026 says it returned to full-year EBITDA profitability in 2025 with an adjusted margin above 10 percent, that total payment volume exceeded $300 billion, up 64 percent, and that net revenue grew more than 30 percent for the second year running. It also reports 99.999 percent uptime and $5.2 billion processed over the Black Friday and Cyber Monday weekend.^[3]

Product and expansion items in the same release include card issuing that reached a $5 billion run rate in the fourth quarter of 2025, alternative payment volume growth of 104 percent across more than 50 methods, new hubs in San Francisco, Atlanta and Sao Paulo, and approval of a limited-purpose bank license application in Georgia as a step toward direct acquiring in the United States. The company is also positioning itself for agentic commerce, with support for Google's Universal Commerce Protocol, Visa Intelligent Commerce and Mastercard's Agent Pay framework.^[3][4]

Pousaz said in the release that the results validate the company's long-standing bet that one unified infrastructure would outperform patched-together legacy systems, and that holding to its principles has earned it the standing to compete in any category and geography.^[3]

Investing, philanthropy and recognition

In May 2021 Pousaz set up the family office Zinal Growth, which focuses on European technology; Wikipedia lists holdings including Ziina, Wayflyer, Pledge, Snickerdoodle Labs and Bloom Money. In 2022 he and his wife founded Pousaz Philanthropies, which concentrates on child safety and education, and Checkout.com's biography says he is active in the Endeavor network and invests in startups.^[1][2]

Employee surveys placed him on Glassdoor's 2021 list of top UK CEOs, according to Checkout.com. Wikipedia cites a Forbes estimate of his net worth at $7.8 billion as of May 2025; such estimates vary by source and date.^[1][2]

Why he matters

Pousaz built a large private payments company without outside capital until 2019, then steered it through a sharp reset in private valuations to profitability. His bet that a single, unified payments stack can serve global enterprises is now being tested again in agentic commerce.^[2][3][4]

On The Executive List

Guillaume Pousaz is ranked No. 84 on The Executive List (October 2026) in the Chief Executive Officers discipline. The ranking reflects The Executive Review's own editorial Trending Score; it is not an outside award, and placement on the list is never sold. View the October 2026 edition.