Feb 23, 2026 · 1h 11m · how-i-built-this
Square: Jim McKelvey. He Lost a $2,000 Sale, Then Built a $10 Billion Company
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gold bands on the timeline = statements, start to end. Hover to read, click to jump. CC turns on captions
In this interview with Guy Raz on How I Built This, Square co-founder Jim McKelvey recounts how losing a $2,000 glass sale led him and Jack Dorsey to invent the mobile card reader and revolutionize credit card processing. McKelvey details how radical transparency, low-cost hardware engineering, and a resilient 'innovation stack' allowed Square to overcome regulatory barriers and defeat retail giants like Amazon.
How this conversation actually went
Every chapter scored 0–10 on four independent dynamics. Hover any point for the reasoning behind the score. Guy holds 39.4% of the talking time here. How this is scored →
Guy as informed peer 3.5 Guest teaching 2.6 Guest disagreement 1.5 Guy pushing back 1.6
speaking balance: gold is Guy, purple is the guest (3 minute bins)
Sharpest disagreement ▶ 53:40 Candor versus confidence reframe
Jim directly dismisses Guy's framing that presenting 140 failure risks was a display of swagger, clarifying that it was radical candor meant to disarm defensive investors.
Hardest push from Guy ▶ 32:42 Guy calls revenge plan a poor use of timeGuy interrupts Jim's recollection of wanting to wage war against Twitter's founders, explicitly challenging the idea as unusual and an unwise allocation of energy.
Biggest teaching moment ▶ 37:20 Card-present mechanics and merchant risk schoolingJim systematically educates Guy on why software camera scanning fails industry compliance and why physical card-present swipe protection is critical for merchant fraud liability.
Guy holds their own ▶ 42:45 Guy outlines network rules versus intermediary feesGuy articulates the structural economic difference between credit card network brand rules and independent sales organization markups to drill down into Square's value proposition.
the scores for every segment, with the reasoning behind each
| Chapter | Topic | Guy as informed peer | Guest teaching | Guest disagreement | Guy pushing back | Why |
|---|---|---|---|---|---|---|
| Promotional Announcement: The How I Built This Advice Line | 4 | 0 | 0 | 0 | Guy opens with promotional housekeeping followed by an introductory monologue outlining regulatory capture, payment processing chains, and Jim McKelvey's background before introducing the guest. | |
| Early Ambition and Writing The Debugger's Handbook | 3 | 2 | 1 | 1 | Jim shares how writing a spite computer science handbook at nineteen launched his career. Guy guides the narrative while asking about publishing logistics and early earnings. | |
| Rejecting Corporate Life for Glassblowing and IBM | 3 | 2 | 1 | 1 | Jim recounts abandoning corporate consulting for artisanal glassblowing and remote technical writing for IBM. Guy asks clarifying questions about glassblowing economics and lifestyle subsidization. | |
| Personal Loss and a Lifelong Commitment to Action | 2 | 1 | 1 | 1 | Jim speaks candidly about his mother's suicide and how the guilt of inaction drove his lifelong bias toward taking action. Guy provides an empathetic, reflective container for the discussion. | |
| Founding Mira and Pivoting to Trade Show CD-ROMs | 3 | 2 | 2 | 3 | Jim describes pivoting Mira into trade show CD-ROMs after Adobe Acrobat crushed his original product. Guy actively challenges Jim when Jim calls his early entrepreneurial ventures mediocre. | |
| Mentoring Jack Dorsey and Shifting to Academic Publishing | 3 | 2 | 1 | 1 | Jim recounts hiring a teenage Jack Dorsey and recognizing the internet's threat to CD-ROMs. Guy prompts for details regarding Dorsey's early abilities and the transition to academic publishing. | |
| Reconnecting with Dorsey and the Lost $2,000 Sale | 4 | 2 | 3 | 4 | Jim details reconnecting with Dorsey post-Twitter ouster and losing a $2,000 glass sale over Amex. Guy forcefully questions Jim's initial impulse to go wage war against Twitter's founders. | |
| Developing the Audio Jack Reader and Card-Present Architecture | 5 | 5 | 2 | 2 | Jim educates Guy on payment mechanics, card-present liability rules, and hacking the iPhone headphone jack. Guy drills down on credit card network incentives versus merchant middleman friction. | |
| Hardware Prototyping, Chinese Manufacturing, and Device Design | 3 | 4 | 1 | 1 | Jim explains hardware prototyping hurdles, Steve Jobs design pressures, heartbeat interference on conductive aluminum, and cost engineering in China. Guy listens and clarifies technical steps. | |
| Presenting 140 Reasons for Failure to Secure Funding | 4 | 4 | 3 | 2 | Jim discusses pitching venture capitalists with a list of 140 reasons Square could fail. Jim explicitly rejects Guy's suggestion that listing failure reasons was an act of confidence rather than candor. | |
| Scaling Up, Patent Disputes, and Stepping Back | 4 | 3 | 2 | 2 | Guy addresses the Robert Morley patent lawsuit with diplomatic neutrality while Jim explains stepping away from operational duties to raise his newborn son. | |
| Defeating Amazon with the Innovation Stack Strategy | 4 | 5 | 2 | 2 | Jim articulates how Square survived predatory undercutting from Amazon through an interdependent Innovation Stack of fourteen proprietary practices. Guy prompts on strategic response choices. | |
| Lowering Drug Testing Costs and Embracing Life's Serendipity | 3 | 2 | 1 | 1 | Jim describes tackling drug testing costs and muses on luck, time travel, and accepting life's past mistakes. Guy facilitates a thoughtful philosophical conclusion. |
Statements from this episode (21)
McKelvey wrote 'The Debugger's Handbook' as a freshman spite project
“So freshman year, out of stubbornness, I wrote what was basically a spite book. I rewrote the textbook for my intern to computer science class from the perspective of a student, and that book turned out to be pretty popular and actually got me a publisher.”
McKelvey learned his value was making superior engineers more productive
“And that's probably the thing I learned best in college, which was I can go into a group of people who are way better than me, and I can make them more productive.”
McKelvey maintained a $1,000-per-day production rule as a glassblower
“My rule was a thousand dollars a day. Every day I work in the studio, I make a thousand dollars.”
McKelvey funded his first startup using his glassblowing studio profits
“Well, I mean, I, that's allowed me to start my other company. My venture capital came out of the studio.”
McKelvey lived on a $25 weekly budget while founding Mira
“My budget was 25 dollars a week. Food, clothing, and transport. That was what I lived on.”
McKelvey's first trade show CD-ROM generated $70,000 in profit
“And the first one I did, I made 70 grand.
Guy Raz: On one product, on one CD.
Jim McKelvey: On one.
Guy Raz: 70 grand profit.
Jim McKelvey: 70,000 dollars of profit, and that was with the trade association actively suing me and trying to stop me.”
Jack Dorsey was not a programming genius as a teenager, says McKelvey
“No, he was very good. We called him Jack the Genius. That was his nickname. But, you know, he was not a genius. He was just very good.”
Early press reports actively erased Twitter founders Jack Dorsey and Noah Glass
“They not only kicked him out of Twitter, they tried to write him out of the history, and I know this very well because I was reading at the time The reports, and they would mention Biz, and they would mention Ev as the founders of Twitter, and they would omit …”
Pre-Square, merchants under $100K in revenue were barred from processing cards
“Basically, if you didn't have a 100,000 dollars of business, You would not take credit cards. That was sort of the cutoff. Because it was too expensive. You had to have a sponsoring bank. You had to have a certain level of accounting. You had to have a physica…”
Middlemen organizations, not Visa and MasterCard, exploit small merchants with fees
“Where the crazy abuse is, is all the middlemen in those transactions. So Visa and MasterCard, they don't really abuse the merchant, but the abuse happens with all their partners. Like the independent sales organizations that work for the banks that work for Vi…”
Apple's strict dock connector rules nearly killed Square's early hardware ambitions
“And at the time, it was this big port at the bottom, and you had to pay Apple for access to that port. You had to pay Apple for a special chip that allowed you to build your hardware, and then you had to Convince them to let you do it, and at the time the iPho…”
Square's early credit card readers cost 97 cents to manufacture
“And each reader cost you how much? 97 cents.”
Square was originally named Squirrel and had an acorn-shaped card reader
“Originally the company was called Squirrel, because we thought squirrels, you know, were cute and saved nuts and thought that was a good payment name. Turns out it was a good payment name, and another company had a payment system called Squirrel, so we pivoted…”
Square's early investor prototypes broke numerous banking laws and financial rules
“Everything worked, but it was breaking many, many laws and rules.”
Venture capital pitches are adversarial games where entrepreneurs routinely lie
“If you've ever been a VC pitch, they're really weird things, because they're basically, the VCs are up there playing defense. They're like goalies. And the entrepreneurs, the people who are pitching are just lying to them.”
Amazon board member offered VC funding to stop Amazon attacking Square
“I remember one guy telling me, oh, Amazon's gonna attack you? Don't worry, I'm on the board of Amazon, and I developed Amazon Prime, and we can get them to leave you alone. Like, if you take our money, we'll guarantee that Amazon doesn't attack you.”
Square received dozens of term sheets with only three investor rejections
“We had several dozen term sheets. I mean, I don't think we had More than three pitches that didn't result in offers.”
Make Magazine's first issue perfectly described Square's card reader design
“If you want to know the real story, just get the first issue of Make Magazine. It's publicly available. It describes exactly what we were building, and I knew that when I went to Bob.”
Amazon surrendered its payment product and mailed Square readers to merchants
“And it failed so badly that Amazon gave us all their soon-to-be former customers and mailed them a Square reader and said, we're out, go to Square.”
Interdependent 'innovation stacks' protect novel inventions from giant corporate copiers
“If you invent something truly new, you're not inventing one thing. You're inventing a stack of things, and that invention becomes its own protection. And as long as you behave properly, I mean, it turns out there are a bunch of rules that if you follow these r…”
Removing financial motivation eliminates the natural milestone to stop working
“When money's not a motivation, there's no reason to stop. Like, it used to be, oh, I'll earn enough too, and then I would say, oh, now I can take a break. Now, since money's not the goal, then I don't have any natural thing to stop me from doing the next thing…”