# The Complete History of Nubank (NU): How a Frustrating Bank Visit Built a $70 Billion Digital Empire
Some of the best companies are born from frustration. Nubank is a perfect example. It began because one man was fed up with how badly Brazilian banks treated their customers, and it grew into the largest digital bank in the world outside Asia. From a single purple credit card to 139 million customers across Latin America and beyond, this is the complete story of Nubank (NU).
The Spark: An Outsider Meets a Broken System
The founder, David Velez, was an outsider. Born in Colombia and raised partly in Costa Rica, he earned an MBA at Stanford and went to work for the legendary venture-capital firm Sequoia, with a mission to find great Latin American companies to invest in. The problem: he could not find any he loved. So he decided to build one himself.
What he found in Brazil shocked him. Just five banks, Itau, Bradesco, Santander, Banco do Brasil and Caixa, controlled roughly 80% of the entire market. With so little competition, they charged some of the highest fees and interest rates in the world while delivering famously poor customer service. Opening a simple bank account could mean bureaucracy, long waits, and dealing with branches behind bulletproof glass. Velez experienced this frustration firsthand, and he saw a massive opportunity: give Brazilians the simple, fair, digital banking the incumbents refused to offer.
Building the Team (2013)
A great idea needs the right people. Velez recruited two co-founders who became essential:
- Cristina Junqueira, a Brazilian engineer with an MBA from Northwestern's Kellogg School, who had just left her job running one of the largest credit-card divisions at Itau, the very kind of bank Nubank would challenge. She understood the enemy from the inside.
- Edward Wible, an American computer scientist from Princeton whom Velez knew from his Sequoia days, who would build the technology.
In 2013, the three founded Nubank. Velez secured $1 million from his mentor at Sequoia and another $1 million from the Argentine venture firm Kaszek. The company was born in a small house in Sao Paulo.
The Purple Card That Changed Everything
Nubank's first product was deceptively simple: a no-fee, purple credit card managed entirely through a smartphone app. No annual fee. No paperwork. No branches. No call-center hell. Just a clean app and genuinely helpful service.
In a country used to being nickel-and-dimed by big banks, this was revolutionary. Word spread fast, and demand exploded. The purple card became a status symbol of sorts, proof you had escaped the old banking system. Nubank grew largely through word of mouth, keeping customer-acquisition costs remarkably low, the foundation of its entire business model.
Explosive Growth
From that single card, Nubank expanded into a full financial platform: digital accounts, debit cards, personal loans, insurance, investments and more. It also expanded geographically, launching in Mexico and Colombia to bring its model to other underbanked Latin American markets.
The customer numbers tell the story. Nubank grew from a startup to tens of millions of users in just a few years, becoming the largest fintech in Latin America and one of the most valuable in the world.
The IPO and the Buffett Seal of Approval (2021)
Nubank's rise attracted one very famous believer: Warren Buffett. His Berkshire Hathaway invested $500 million in Nubank before its IPO and another $250 million at the debut, a remarkable endorsement from an investor known for avoiding tech and IPOs.
On December 9, 2021, Nubank went public on the New York Stock Exchange under the ticker NU. It priced shares at $9, raised about $2.6 billion, and reached a valuation near $41 billion, at the time making it one of the most valuable banks in all of Latin America, more valuable than century-old incumbents it had set out to disrupt.
Where Nubank Stands Today
- A massive user base: around 139 million customers across Brazil, Mexico and Colombia, making it the largest digital bank outside Asia.
- Real profits: Nubank crossed $1 billion in quarterly profit for the first time in 2026, proving the model works at scale, not just in growth.
- A roughly $70 billion company, trading around $14 a share as Nu Holdings (NU).
- Going global: in a landmark move, Nubank launched in the United States with Nu Global, a stablecoin-backed borderless account, its boldest step yet toward becoming a worldwide fintech.
The Bottom Line: From a Bad Bank Visit to a Global Giant
Nubank is proof that the best businesses often solve a real, everyday frustration. David Velez did not invent banking; he simply made it fair, simple and digital in a market that had forgotten how. In doing so he built one of the great fintech stories of the century.
Our take: A rare growth story with real profits behind it. Many disruptors grow fast and never make money; Nubank is now doing both, scaling toward its huge Latin American opportunity while finally posting serious profits, and opening a brand-new global chapter in the US. The risks are real, fierce competition, credit exposure in volatile economies, and a valuation that prices in continued growth. But few companies have turned customer frustration into a durable competitive advantage as effectively as Nubank. For investors, it is a high-conviction bet on the future of banking in the developing world. Key risk to watch: a sharp economic downturn in Brazil or heavy losses on its growing loan book, which would test whether its profits can survive a tougher credit cycle.---
This article is for informational purposes only and is not financial advice. Always do your own research before investing.
