Uploaded October 2025 | Updated September 2026, 2 weeks ago
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 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 → foundr.com/startdollartrial
PREFER A CUSTOM ROADMAP AND 1-ON-1 COACHING?
→ Starting from scratch? Apply here → foundr.com/pages/coaching-start-application
→ Already have a store? Apply here → foundr.com/pages/coaching-growth-application
CONNECT WITH NATHAN CHAN
Instagram → instagram.com/nathanchan
LinkedIn → linkedin.com/in/nathanhchan
CONNECT WITH SUNEERA MADHANI
Website → staxpayments.com
Instagram → instagram.com/suneeramadhani
LinkedIn → linkedin.com/in/suneeramadhani
00:00 – From Laughed Out of the Room to $1B Fintech Founder
01:17 – Immigrant Roots & Growing Up Around Small Businesses
03:53 – The Lightbulb Moment That Sparked Stax
05:50 – Pitching Her Employer & Getting Rejected
08:23 – Why Her Family Said “Why Not You?”
09:56 – Quitting Her Job, Moving Home & Building From Scratch
11:20 – How Suneera Processed $5M in Payments in Just 6 Months
13:01 – Bootstrapping on $50K & Using White-Label Tech to Launch
17:55 – The Bet on Omnichannel Payments That Changed Everything
18:33 – Surviving 10 Years of Blood, Sweat & Tears
22:06 – Turning Down a $17.5M Buyout Offer
28:15 – Fundraising Lessons: Advisors, Intuition & Execution
33:12 – Inside Her Latest Funding Round & Relationship-Driven Capital
36:31 – Why She Rebranded From FatMerchant to Stax
40:21 – The Hardest & Best Decision as CEO
41:22 – Where to Find Suneera Madhani & CEO School
FOLLOW FOUNDR FOR MORE BUSINESS GROWTH STRATEGIES
YouTube → bit.ly/2uyvzdt
Website → foundr.com
Instagram → instagram.com/foundr
Facebook → facebook.com/foundr
Twitter → twitter.com/foundr
LinkedIn → linkedin.com/company/foundr
Podcast → foundr.com/podcast
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 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 → foundr.com/startdollartrial
PREFER A CUSTOM ROADMAP AND 1-ON-1 COACHING?
→ Starting from scratch? Apply here → foundr.com/pages/coaching-start-application
→ Already have a store? Apply here → foundr.com/pages/coaching-growth-application
CONNECT WITH NATHAN CHAN
Instagram → instagram.com/nathanchan
LinkedIn → linkedin.com/in/nathanhchan
CONNECT WITH SUNEERA MADHANI
Website → staxpayments.com
Instagram → instagram.com/suneeramadhani
LinkedIn → linkedin.com/in/suneeramadhani
00:00 – From Laughed Out of the Room to $1B Fintech Founder
01:17 – Immigrant Roots & Growing Up Around Small Businesses
03:53 – The Lightbulb Moment That Sparked Stax
05:50 – Pitching Her Employer & Getting Rejected
08:23 – Why Her Family Said “Why Not You?”
09:56 – Quitting Her Job, Moving Home & Building From Scratch
11:20 – How Suneera Processed $5M in Payments in Just 6 Months
13:01 – Bootstrapping on $50K & Using White-Label Tech to Launch
17:55 – The Bet on Omnichannel Payments That Changed Everything
18:33 – Surviving 10 Years of Blood, Sweat & Tears
22:06 – Turning Down a $17.5M Buyout Offer
28:15 – Fundraising Lessons: Advisors, Intuition & Execution
33:12 – Inside Her Latest Funding Round & Relationship-Driven Capital
36:31 – Why She Rebranded From FatMerchant to Stax
40:21 – The Hardest & Best Decision as CEO
41:22 – Where to Find Suneera Madhani & CEO School
FOLLOW FOUNDR FOR MORE BUSINESS GROWTH STRATEGIES
YouTube → bit.ly/2uyvzdt
Website → foundr.com
Instagram → instagram.com/foundr
Facebook → facebook.com/foundr
Twitter → twitter.com/foundr
LinkedIn → linkedin.com/company/foundr
Podcast → foundr.com/podcast
