Famous Quote
“I sold my users' privacy to a larger benefit. I made a choice and a compromise. And I live with that every day.”
Why #47
Acton co-built the world's most-used messaging app, then walked away from $850M on principle to fight for user privacy. His funding of Signal has made encrypted communication accessible to billions.
The Story
Brian Acton co-founded WhatsApp with Jan Koum and helped build it into the world's most-used messaging app before Facebook acquired it for $19 billion in 2014. But Acton's most defining act came after the acquisition: he walked away from $850 million in unvested stock because he disagreed with Facebook's plans to monetize WhatsApp with ads and data collection.
That principled departure — giving up nearly a billion dollars over a belief in user privacy — was extraordinary even by Silicon Valley standards. Acton then invested $50 million of his own money to launch the Signal Foundation, the nonprofit behind Signal, the encrypted messaging app used by journalists, activists, and anyone who prioritizes privacy over convenience.
Acton's career arc tells a poignant story: he was rejected by both Facebook and Twitter when he applied for engineering jobs (his tweet 'Facebook turned me down. It was a great opportunity to connect with some fantastic people. Looking forward to life's next adventure.' went viral after the $19B acquisition). He then built the app that Facebook wanted so badly it paid the largest acquisition price for a venture-backed company in history.
Key Achievements
Co-founded WhatsApp (2009) — 2B+ users worldwide
WhatsApp acquired by Facebook for $19B (2014)
Walked away from $850M in unvested Facebook stock over privacy principles
Founded the Signal Foundation with $50M of his own money
Signal is now the gold standard for encrypted messaging
Rejected by both Facebook and Twitter before building WhatsApp
By the Numbers
2B+
WhatsApp Users
$19B
Acquisition Price
$850M
Stock Walked Away From
$50M
Signal Foundation Seed
Fun Facts
He tweeted 'Facebook turned me down' in 2009 — four years later, Facebook paid $19B for his company.
He also tweeted about being rejected by Twitter. Both rejection tweets went viral after the WhatsApp acquisition.
He drove a modest car and lived simply even after becoming a billionaire.
His 'Delete Facebook' tweet in 2018 was one of the most-shared posts by a former Facebook insider.
He met Jan Koum while both worked at Yahoo — they bonded over their shared hatred of advertising.
Frequently Asked Questions
Who are the greatest entrepreneurs of all time?
The greatest entrepreneurs include Steve Jobs (Apple), Elon Musk (Tesla/SpaceX), Jeff Bezos (Amazon), Bill Gates (Microsoft), and Mark Zuckerberg (Meta). Each built companies that fundamentally changed how the world works — from personal computing and smartphones to e-commerce, cloud computing, and social media.
What makes someone a successful entrepreneur?
Successful entrepreneurs share several traits: the ability to identify unmet needs, willingness to take calculated risks, relentless execution, and resilience in the face of failure. They combine vision with practical problem-solving and are willing to persist long after most people would quit. Capital and credentials matter far less than most people think — resourcefulness beats resources.
Can you become an entrepreneur without a business degree?
Absolutely. Many of the greatest entrepreneurs had no business education. Steve Jobs dropped out of college. Richard Branson left school at 16. Sara Blakely was selling fax machines. Henry Ford had no formal engineering training. Jack Ma was an English teacher. What matters is not the degree — it is the ability to see an opportunity, build something people want, and persist through failure.
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