6 December 2025 (Saturday)
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How Ben Chestnut Turned Mailchimp From a Side Project Into a $12 Billion Empire

How Ben Chestnut Turned Mailchimp From a Side Project Into a $12 Billion Empire
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Author: Aditya Pareek | EQMint | Business News


Ben Chestnut never set out to build a startup, let alone one of the most iconic tech companies of the last two decades. In fact, Mailchimp began as nothing more than a side project — a small tool he built with his co-founder, Dan Kurzius, to help clients send email newsletters. It wasn’t glamorous. It wasn’t funded. And it definitely wasn’t built with the ambition of becoming a billion-dollar company.


Yet while Silicon Valley chased venture capital, blitzscaling, and growth-at-all-costs strategies, Chestnut quietly built Mailchimp from Atlanta — profit-first, customer-obsessed, and completely bootstrapped. That unconventional path is exactly what made Mailchimp one of the greatest startup stories in tech.


In the early 2000s, Chestnut ran a struggling web design agency. Clients constantly asked for help with email marketing, which, at the time, was expensive and complicated. To make their lives easier, he created a simple tool: Mailchimp. It wasn’t meant to replace the agency’s business. It was just one more service to pay the bills. But there was a clear pattern — clients loved the tool more than anything else the agency offered. Over time, Mailchimp began generating more revenue than the agency itself.


Chestnut did something rare in the startup world: he listened.
He didn’t chase trends; he followed demand.


By 2007, the founders shut down the agency and focused entirely on Mailchimp. They didn’t raise a single dollar of venture capital. Every customer dollar went back into improving the product. This discipline became their advantage. Mailchimp grew steadily, sustainably, and profitably — a stark contrast to VC-backed competitors burning millions for growth.


Mailchimp’s breakthrough came with its decision to introduce a freemium model. Suddenly, millions of small businesses, creators, and freelancers who couldn’t afford traditional marketing tools could use Mailchimp for free. The company exploded in popularity. What started as a humble email tool became an all-in-one marketing platform powering newsletters, automation, e-commerce engagement, and customer insights for businesses worldwide.


Throughout the journey, Chestnut stayed grounded in a simple philosophy: build for small businesses, not for Silicon Valley approval. He turned Mailchimp into a brand known for personality — the quirky monkey mascot, fun copywriting, and user-friendly design. It was software that didn’t feel like software.


By 2021, Mailchimp had become a global powerhouse with millions of users and hundreds of millions in annual revenue. That same year, Intuit acquired Mailchimp for an astonishing $12 billion — one of the largest acquisitions in marketing tech history. For a company that never took VC funding, the exit remains one of the most successful bootstrap stories ever told.


Ben Chestnut’s journey is a reminder that empires don’t always start with grand visions. Sometimes, they start as small tools built to solve simple problems. What matters is execution, patience, and listening to what customers truly want.


Mailchimp wasn’t supposed to be a world-changing company.


But in Chestnut’s hands, a side project became a global marketing giant — proving that great businesses can come from anywhere, even from the projects meant only to “pay the bills.”


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Disclaimer: This article is based on information available from public sources. It has not been reported by EQMint journalists. EQMint has compiled and presented the content for informational purposes only and does not guarantee its accuracy or completeness. Readers are advised to verify details independently before relying on them.

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