599: They Rejected Her Idea, She Turned it into a BILLION Dollar Business | Suneera Madhani (Best of Foundr)

Suneera Madhani built Stax from an idea her employer rejected into a $1B fintech unicorn processing over $25B in payments. In this interview, the Stax co-founder shares how she went from selling credit card terminals out of her car to pioneering the first subscription-based payment processor, raising over $500M in capital, and scaling a company now generating $120M+ in revenue. From turning down a $17.5M acquisition offer to building an omnichannel platform before “fintech” was even a word, Suneera breaks down the strategies, resilience, and leadership lessons that took her from a scrappy founder to one of the most successful female entrepreneurs in tech. What you’ll learn from this interview: • How Suneera turned a rejected idea into a billion-dollar company • The scrappy marketing tactics that got her first 250 customers • Why she turned down a $17.5M acquisition offer early on • The lessons from raising over $500M in funding and navigating investors • How to build an MVP using white-label solutions and customer feedback • The importance of execution and focus over “big ideas” • Why resilience, intuition, and community are critical for long-term success • The rebrand from FatMerchant to Stax and what it taught her about scaling By the end of this interview, you’ll walk away with proven insights for scaling a fintech or SaaS company from zero to unicorn status—so you can apply the same strategies to grow your own business with focus and resilience. SAVE 50% ON OMNISEND FOR 3 MONTHS Get 50% off your first 3 months of email and SMS marketing with Omnisend with the code FOUNDR50. Just head to https://your.omnisend.com/foundrhttps://your.omnisend.com/foundr to get started. HOW WE CAN HELP YOU SCALE YOUR BUSINESS FASTER Learn directly from 7, 8 & 9-figure founders inside Foundr+ Start your $1 trial → https://www.foundr.com/startdollartrial PREFER A CUSTOM ROADMAP AND 1-ON-1 COACHING? → Starting from scratch? Apply here → https://foundr.com/pages/coaching-start-application → Already have a store? Apply here → https://foundr.com/pages/coaching-growth-application CONNECT WITH NATHAN CHAN Instagram → https://www.instagram.com/nathanchan LinkedIn → https://www.linkedin.com/in/nathanhchan/ CONNECT WITH SUNEERA MADHANI Website → https://staxpayments.com/ Instagram → https://www.instagram.com/suneeramadhani/ LinkedIn → https://www.linkedin.com/in/suneeramadhani/ FOLLOW FOUNDR FOR MORE BUSINESS GROWTH STRATEGIES YouTube → https://bit.ly/2uyvzdt Website → https://www.foundr.com Instagram → https://www.instagram.com/foundr/ Facebook → https://www.facebook.com/foundr Twitter → https://www.twitter.com/foundr LinkedIn → https://www.linkedin.com/company/foundr/ Podcast → https://www.foundr.com/podcast