Jul 21, 2025 · 54m · product-market-fit
How Mercury Hit $500M ARR—then raised $300M from Sequoia at $3.5B. | Immad Akhund, CEO & Founder ... · PMF Show
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In this episode of the Product Market Fit Show, Mercury CEO and founder Immad Akhund explains how he built Mercury into a fintech leader reaching $500M in ARR and a $3.5B valuation. He shares insights on navigating banking regulation, executing an incorporation-focused go-to-market strategy, surviving macroeconomic shocks, and preserving company culture during rapid scale.
How this conversation actually went
Every chapter scored 0–10 on four independent dynamics. Hover any point for the reasoning behind the score. Pablo holds 18.6% of the talking time here. How this is scored →
Pablo as informed peer 3.8 Guest teaching 4.7 Guest disagreement 1.3 Pablo pushing back 1.3
speaking balance: gold is Pablo, purple is the guest (3 minute bins)
Sharpest disagreement ▶ 42:44 Fintech vs Bank Clarification
Immad directly corrects Pablo's framing of Mercury as a bank, clarifying that Mercury is strictly a fintech partnering with sponsor banks.
Hardest push from Pablo ▶ 19:23 VC Capital Allocation DefensePablo pushes back on Immad's dismissal of VC value-add by arguing that a VC's primary duty is risk-adjusted capital allocation.
Biggest teaching moment ▶ 44:26 Deconstructing Legacy Bank Auth FlawsImmad educates Pablo on why legacy banks require cumbersome wire phone calls, attributing it to obsolete TOTP authentication rather than compliance regulations.
Pablo holds their own ▶ 19:23 Explaining Core Venture EconomicsPablo articulates an informed breakdown of how venture capital creates value through portfolio risk management rather than hands-on coaching.
the scores for every segment, with the reasoning behind each
| Chapter | Topic | Pablo as informed peer | Guest teaching | Guest disagreement | Pablo pushing back | Why |
|---|---|---|---|---|---|---|
| Lessons from Heyzap and Achieving Initial Product-Market Fit | 3 | 4 | 1 | 1 | Pablo prompts Immad to detail his background before Mercury. Immad explains the four pivots at Heyzap and contrasts false progress with real product-market fit. | |
| Generating Startup Ideas in Broken Ecosystems | 3 | 4 | 1 | 1 | Pablo asks how idea generation evolved over Immad's career. Immad explains how the lack of modern infrastructure in 2006 made problems visible everywhere. | |
| Transitioning from Heyzap to Researching Mercury | 4 | 4 | 1 | 1 | Pablo tracks the transition from the sale of Heyzap to the initial concept of Mercury. Immad shares his framework around the consumerization of enterprise tools. | |
| The Enabling Technology of Banking-as-a-Service | 4 | 5 | 2 | 2 | Immad explains the rise of Banking-as-a-Service and why fintech infrastructure is significantly harder to build than standard SaaS. Pablo probes why competitors hadn't moved faster. | |
| Leveraging the Scale and Ambition of Silicon Valley | 5 | 4 | 2 | 2 | Immad explains why he found angel investing depressing, arguing top founders succeed regardless of investors. Pablo pushes back with an analysis of VC as capital allocation. | |
| Securing Sponsor Bank Term Sheets Pre-Fundraising | 4 | 6 | 1 | 1 | Immad outlines his process for falsifying the startup idea by consulting fintech lawyers and securing sponsor bank term sheets before writing code. | |
| Blitz-Scaling Partner Bank Relationships at Money 20/20 | 4 | 5 | 1 | 1 | Immad details blitzing 30 bank meetings at Money 20/20 and how an informal catch-up with Andreessen Horowitz turned into a seed term sheet. | |
| Identifying White Space in Startup Banking | 4 | 6 | 2 | 2 | Immad provides context on the neobank landscape and shares a contrarian philosophy on keeping zero users until all core payment rails are built. | |
| Maintaining Speed with a Compact Engineering Team | 4 | 4 | 1 | 1 | Immad discusses keeping the engineering team under ten people to eliminate management overhead, with Pablo concurring on communication drags. | |
| Launching Mercury and Achieving 30-40% Monthly Growth | 4 | 4 | 1 | 1 | Immad recounts the public launch and how activating 60 angel investors on Twitter provided immediate distribution and 30-40% monthly growth. | |
| Partnering with Stripe Atlas and Y Combinator | 4 | 6 | 2 | 2 | Immad clarifies Mercury's status as a fintech rather than a bank and breaks down how legacy banks fail at onboarding and wire security. | |
| Capturing Early-Stage Startups at Incorporation | 4 | 5 | 2 | 2 | Immad explains why targeting newly incorporated companies avoids high switching friction and clarifies how Mercury monetizes via interchange and deposit interest. | |
| Overcoming March 2020 Interest Rate Collapse | 4 | 5 | 1 | 1 | Immad recounts the panic of March 2020 when interest rates fell to zero, wiping out 60% of revenue until e-commerce debit volume rebounded. | |
| Securing Series A Funding Three Weeks Post-Launch | 3 | 4 | 1 | 1 | Immad explains raising a $20M Series A three weeks after launch and recognizing true PMF only after surviving the initial COVID shock. | |
| Writing Down Cultural Values at Four Employees | 3 | 4 | 1 | 1 | Immad shares his key advice for early founders: codifying cultural values at four employees to guide hiring at scale. |
Statements from this episode (28)
Akhund: Operating a business naturally reveals constant B2B startup ideas
“If you're running a business, you're just like, there's so many problems in running a business that you just see ideas everywhere. Like if you're an engineer, you see developer tool ideas everywhere.”
Akhund: Slack, Stripe, and Gusto succeeded by applying consumer UX to enterprise
“There was a lot of ideas came out, which were just like taking consumer grade product and design and applying it to just like the Slack kind of thing. The Slack, Stripe, Gusto, et cetera.”
Akhund: 2018 Was the First Year BaaS Made Seed Fintech Launches Viable
“Probably 18 was like the first year where there was like a few of these services that you could actually get live with and you didn't have to go, because before then what used to happen is you'd have to go find a bank”
Akhund: Building a fintech with money movement is 3x harder than software
“I would say to do a fintech company in general, especially one that has like any sort of payments like money movement it's probably three times harder than a software company. Like a software company, you can probably launch at three months, a payment slash ba…”
Akhund: Mercury avoided an overcrowded neobank market by launching in 2019
“If we hadn't launched in 2019 and built up like a little bit of a lead, it would have been probably like an overly competitive space by 2020, 20, 21.”
Akhund: Rappi founders never spoke to him again after his investment
“I made this investment in this company called Rappi which is a doordash for Latam, and it's done really well. Nice, nice, nice. Honestly, I invested and they never talk to me again.”
Akhund: Great founders succeed regardless of any investor input
“If you're a good company with a good founder, you're probably gonna raise money from someone else, if not me and you'll probably be successful regardless of any investor input.”
Akhund: Y Combinator is truly transformational because it invests when others do not
“I mean, there are some things like Y Cominator that like are truly transformational. Like they, you know, they make an investment when other people are not, or like they come up with a model that's different.”
Akhund: Fintech founders can gain free market intelligence from brief lawyer calls
“Lawyers are pretty useful. They're smart. They know the law, but B they actually like also know people like they know companies that have done this or tried to do this and who have they partnered with. If you think about it, a lawyer is often you know, working…”
Akhund: Mercury secured three sponsor bank term sheets before VC fundraising
“The Deliverables or the items that I had before, you know, I did a fundraise was, you know, I had some, I worked with a designer and I had, like, some rough initial designs of, like, what it might look like, and I had, like, three, either sponsor banks or bass…”
Akhund: Fintech founders can easily reach bank partnership heads through networks
“Whether you work with lawyers or other fintech entrepreneurs, like you can normally get to the partnership people at these places. So getting like an actual like test term sheet, not that hard.”
Akhund landed 30 bank meetings by cold-emailing Money 20/20 attendees
“I went to this conference, Money, 2020, which is, like, the biggest FinTech conference and I basically got the full list of attendance, and I, you know, scrapes and stuff, and I found, like, the 60 people who were going that had that were, like, from a bank, a…”
Akhund: a16z offered Mercury a seed term sheet same-day pre-product
“We met on the Tuesday, they gave me a turn shoot on the Tuesday. So it was done. But I mean, they moved quickly and I appreciated that and like they really you know, who knows whether I would have got any other VC, but like they really did believe in, in the m…”
Akhund: Chime focuses primarily on underbanked and subprime consumers
“They were, and I would say they still are focused on kind of underbanked consumers, like people who don't have bank accounts, and they're well, they're like, yeah subprime kind of consumers.”
Akhund: No U.S. startup or SMB neobank operated at scale before Mercury
“Yeah, I think the, there was one company that tried a little bit called Seed that was doing kind of SMB banking, but at that point that kind of faltered but yeah, nothing at scale for sure.”
Akhund: Startups with known feature roadmaps should build before acquiring users
“I've also found that if you don't build a thing up front, it's often actually hard to build it after you launch. This is, like, pretty contrarian, but just when you have users and, like, Yeah. You have to worry about things breaking and like fixing bugs and et…”
Akhund: Startup execution slows significantly once teams exceed 16 people
“I've also found that more than, probably around, like, the number 16 things slow down quite a bit. Like, you need, with, like, eight people in a room, like, you don't really need management. It's like, everyone knows what everyone's doing. Everyone's doing, yo…”
Akhund: Mercury grew 30% to 40% monthly during its first year
“And we grew kind of 30 to 40% a month for the first 12 months.”
Akhund: Mercury intentionally added 60 seed investors to drive distribution
“We had 60 investors in our seed round. So I, you know, I deliberately, you know, we had recent Horowitz as a lead, and then as soon as they kind of committed, which is relatively early, I deliberately went and like Hunted people that had like a large portfolio…”
Mercury wanted to do Y Combinator but the deal fell through
“I kind of wanted to do it for Mercury as well. It didn't work out”
Akhund: Opening an SVB account took three weeks when Mercury launched
“SVB was not in-person at the time, but it took three, three weeks of, like, doing online forms and waiting”
Akhund: Traditional banks require manual wire calls due to weak security
“A lot of the reasons that wires are like that is because banks don't have, like, true TOTP authentication, right? Like, when you, I mean, nowadays, I guess they mostly have SMS kind of verification, but that's very easy to, you know, steal someone's phone numb…”
Akhund: About 75% of Mercury Customers Join Within Six Months of Incorporation
“Nowadays about 75% of our customers are within, with Probably their first bank account within six months of incorporating.”
Akhund outlines Mercury's dual monetization model
“The two, two main ways is, number one, people use our debit card or credit card, and we make money on the interchange, so every time you swipe, there's a fee, and as the issuer, you get, like, a pretty big chunk of the fee and then number two, we, you know, if…”
Akhund: 60% of Mercury's Revenue Disappeared When Interest Rates Hit Zero in 2020
“When COVID happened like, it's, like, March, 2020, interest rates go to zero which, you know, from our perspective, like, that was, like, At that point, like, 60% of our revenue went to zero, basically.”
Mercury Reached $1M ARR Five Months After Launching in April 2019
“April, 2019 is when we launched and we were at a million dollars in annualized revenue in September, 2019.”