Expensify

David Barrett started programming at age six and went on to work in virtual reality labs and 3D graphics engines before joining Travis Kalanick at Red Swoosh, a peer-to-peer file transfer company acquired by Akamai in 2007. In 2008, Barrett left to start Expensify—but not for the reason you'd think. He initially had no interest in expense reports whatsoever. Instead, he was building in the prepaid debit card space, approaching banks for partnerships. When banks rejected him as "too risky," Barrett pivoted to what he thought would be the most boring possible product: expense reporting. It was meant to be a Trojan horse to gain credibility with financial institutions.

Here's where the story gets interesting. Once Barrett launched the expense report feature—a mobile app that photographs receipts and automatically extracts information—the market's reaction surprised him. Users loved it. Everyone said, "Forget the prepaid cards, this expense report thing is amazing." Barrett realized he'd stumbled onto something genuinely useful. What he'd initially created as cover for a different product became the real business.

The acquisition model was unconventional from the start. Rather than chasing enterprise deals, Barrett focused on making the product so good that individual users—the janitor, the office assistant—would organically adopt it and champion it upward within their organizations. Pricing at around $9 per month per active user kept it accessible to everyone.

Expensify's growth accelerated when Barrett stopped chasing enterprise customers and refocused on the mid-market and small business segment. He admitted that the enterprise space had distracted them for a couple of years with its promise of big logos, but discovered that enterprise actually "sucks"—slow sales cycles, terrible margins, high competition.

Most critically, Expensify proved that you don't need paid advertising or aggressive capital deployment to scale. While many companies raise hundreds of millions to fuel ads and aggressive sales teams, Expensify grew primarily through word-of-mouth. "Every business you cared about was ever built through word of mouth," Barrett argued, noting that VCs don't fund this model because it doesn't align with their capital deployment playbook. By December 2017, the company had zero advertising spend and was growing 50-100% year-over-year organically.

With 45,000 paying companies (more than the next four expense reporting competitors combined) and approximately $60-100M in annual recurring revenue, Expensify operates lean with 110 employees. The company raised $27 million in funding but has since become profitable and stopped the fundraising treadmill. Barrett deliberately kept prices low—the least expensive option in the market—prioritizing customer acquisition volume over extracting maximum wallet share. His philosophy: grow massive at scale rather than squeeze each customer harder. This bottoms-up, consumer-first acquisition model proved that even at scale, word-of-mouth and product excellence could outpace conventional venture-backed growth strategies.