Checkout.com

Checkout.com was founded by Guillaume Pousaz, a Swiss economics dropout who abruptly packed his bags and moved to California to surf after failing his university exams. He eventually drifted into the payments industry, relocating to Mauritius to build an early processing gateway before officially incorporating Checkout.com in London in 2012. Pousaz made a radical corporate decision: he refused all external venture capital funding for the first seven years of the company's lifecycle, bootstrapping operations entirely on organic transaction revenues and flying completely under the radar of Silicon Valley.

After remaining completely profitable in total obscurity, Checkout.com stunned the European tech ecosystem in May 2019 by closing a massive $230 million Series A investment round. Led by Insight Partners and DST Global, it represented the largest ever debut Series A funding round for a European fintech startup. The capital injection revealed that Pousaz had quietly built a cross-border payments powerhouse, processing billions of dollars for giant digital merchants like Shein, Grab, and Deliveroo by integrating payment processing, gateway, and fraud screening into a single API.

During the peak of the pandemic digital asset craze, Checkout.com grew exponentially by positioning its software infrastructure as the dominant payment gateway for the cryptocurrency industry. The firm signed up massive crypto platforms, including Binance, Coinbase, and Crypto.com, processing tens of billions of dollars in high-margin credit card transactions from retail consumers buying digital tokens. This highly specialized processing volume propelled Checkout.com's transaction metrics to historic highs, making it the primary financial bridge between fiat currency and the crypto world.

In January 2022, Checkout.com raised a massive $1 billion Series D round, pushing its private market valuation to an astronomical $40 billion and making Guillaume Pousaz the wealthiest self-made billionaire in Europe on paper. However, the victory was short-lived as the tech market turned hostile months later. As interest rates spiked and crypto volumes imploded, Checkout.com was hit by a wave of corporate markdowns, forcing management to internally slash its own valuation by over 70% down to $11 billion to match public market comps.

By mid-2026, Checkout.com successfully completed a grueling corporate pivot away from high-risk cryptocurrency processing to focus entirely on institutional B2B enterprise marketplaces across the Middle East and Europe. Under Guillaume Pousaz's continued leadership, the company expanded its high-margin automated identity verification and fraud prevention software suites. With annualized processing volumes stabilizing past $250 billion, the private firm remained highly profitable, generating over $1.1 billion in net operational revenue while avoiding the public market listing route.