The Fintech Blueprint

In this episode, Lex chats with Immad Akhund, CEO and founder of Mercury, a leading neobank for businesses. Immad shares his entrepreneurial journey, explaining how frustrating banking experiences inspired Mercury's creation.

They discuss Banking as a Service, open banking, embedded finance, and core banking systems. Immad details Mercury's product philosophy, team structure, and migration away from Synapse before its collapse. He also outlines Mercury's impressive growth, with 300,000 customers, $650M in annual revenue, and three years of profitability.

The conversation concludes with Mercury's future plans, including lending expansion, a bank charter application, and hopes for smarter AI-driven regulatory compliance.

NOTABLE DISCUSSION POINTS:

Banking-as-a-Service Has Been Completely Restructured - and the Original Model Is Dead: The fintech BaaS layer that enabled the 2019–2021 neobank boom - middleware providers like Synapse, Unit, and Bond sitting between fintechs and partner banks - has effectively collapsed. The replacement model is banks themselves exposing modern APIs directly, with Column Bank and Lead Bank emerging as the new infrastructure layer. Mercury navigated this shift early, moving entirely off Synapse months before its April 2024 failure, but the broader lesson is that the hundred-program BaaS model broke under the weight of compliance and reconciliation complexity.

Mercury’s 40% Startup Market Share Is Just the Entry Point to a $2 Trillion Opportunity: Mercury captures over 35% of early-stage US startups, but broader SMB banking represents 30% of all banking revenue - a $2 trillion market. The company is now expanding into personal banking (launched December 2025), lending (bank charter application filed), and subscription software. Akhund frames Mercury not as a bank but as a financial operating system - the “Google suite of banking” - where deposits are the entry point to invoicing, bill pay, spend management, and eventually underwriting.

Stablecoins Don’t Magically Solve the Ledger Problem: Akhund pushes back on the narrative that stablecoins eliminate reconciliation risk. In practice, most stablecoin providers pool customer funds into shared wallets and run their own abstraction layers and internal ledgers - recreating the same reconciliation challenges that exist in traditional banking. The benefit only holds in the narrow case where users truly own their own keys and wallets, which is rarely how scaled fintech products operate.

TOPICS

Mercury, Synapse, Chase, Evolve Bank, Column Bank, Stripe, Plaid, Coinbase, neobank, neobanking, banking-as-a-service, BAAS, fintech, fintech regulation, reconciliation, product development, stablecoins, API, blockchain, VCs, embedded finance

 

ABOUT THE FINTECH BLUEPRINT

🔥Subscribe to the Fintech Blueprint newsletter to stay at the forefront of Fintech and DeFi: https://bit.ly/3hyhlC2

🤝 Partner with Fintech Blueprint through sponsorships: https://bit.ly/3UZllsV

👉 Twitter: https://twitter.com/LexSokolin

 

TIMESTAMPS

1’05: Signing up for six bank accounts and asking for an API nobody understood : how the idea for Mercury was born

4’57: Why depository banking was fintech's last untouched frontier : partner banks, BaaS, and the gap Mercury filled

6’54: BaaS, open banking, embedded finance, and banking cores : a plain-English breakdown of fintech's alphabet soup

13’50: Competing against Chase and Wells Fargo : why Mercury's best advantage is how bad banks still are

18’28: Checkbox banking versus handcrafted product : how Mercury built a unified experience that incumbents can't replicate

20’52: Autonomous product teams and customer-first engineering : how Mercury structures 300 people to ship like a startup

23’21: The right unit of speed : why Mercury bets on autonomy over coordination in product development

26’14: Navigating the Synapse collapse : how Mercury moved off early and reconciled every transaction

29’42: Stablecoins as the new embedded finance : why blockchain ledgers don't magically solve reconciliation

31’52: $650M in revenue and still just getting started : Mercury's vision for the Google suite of banking

35’04: Why profitability beats begging VCs : Mercury's business model and the case for financial independence

37’42: 40% of startups and a bank charter application : Mercury's roadmap inside a $2 trillion market

41’28: The path to a national bank charter : why AI will reshape compliance costs for fintechs

44’00: The channels used to connect with Immad & learn more about Mercury

Disclaimer here — this newsletter does not provide investment advice and represents solely the views and opinions of FINTECH BLUEPRINT LTD.
Contributors: Lex, Laurence, Matt, Farhad, Mike, Daniella
Want to discuss? Stop by our Discord and reach out here with questions.

In this episode, Lex chats with Marc Boiron — CEO of Polygon Labs. Marc shares his journey from law to blockchain, discussing the challenges of navigating crypto’s evolving legal landscape and the complexities of structuring compliant DeFi projects. He explains Polygon’s strategic pivot to focus on stablecoin payments, leveraging its proven blockchain and global partnerships.

Marc highlights Polygon’s real-world adoption, competitive edge, and vision to become the leading platform for on-chain payments. The episode offers insights into regulatory hurdles, industry trends, and Polygon’s mission to transform digital money movement.

NOTABLE DISCUSSION POINTS:

The Labs-Foundation Structure Is a Frankenstein - and Its Creator Knows It: Marc helped architect the legal frameworks behind major DeFi token launches but openly calls the outcome a “complete Frankenstein.” The arm’s-length separation between labs and foundations was necessary to survive regulatory hostility, but makes coherent execution nearly impossible. He argues projects still copying this structure today are doing so out of habit, not legal necessity.

Generalist Blockchains Are Dead - Polygon Is Betting Everything on Payments: As chain architectures converge, Boiron believes differentiation through speed and low fees is over. Polygon analysed its actual usage, found stablecoin payments was the standout vertical - $2.3 trillion already moved, fintechs across LatAm, Africa, and Southeast Asia already on-chain - and went all-in. The thesis is binary: if all money moves on-chain within a decade, even the 50th-best payments chain wins big.

Polygon’s Real Moat Is Enterprise Trust Built During the NFT Era: The 2022–23 enterprise NFT push looked like a dead end after FTX collapsed, but it left behind institutional due diligence and credibility. Fintechs evaluating payments chains find that Polygon has years of live production use, Fortune 500 relationships, and Stripe already defaulting to it - a trust advantage no newly launched chain can replicate.

TOPICS

Polygon Labs, Polygon protocol, blockchain, crypto, decentralized finance, DeFi, legal frameworks, token launches, meme coins, stablecoins, payments, fintech, Ethereum, ICO boom, web3, NFT, Stripe, Circle

 

ABOUT THE FINTECH BLUEPRINT

🔥Subscribe to the Fintech Blueprint newsletter to stay at the forefront of Fintech and DeFi: https://bit.ly/3hyhlC2

🤝 Partner with Fintech Blueprint through sponsorships: https://bit.ly/3UZllsV

👉 Twitter: https://twitter.com/LexSokolin

 

TIMESTAMPS

1’09: From Spreadsheets to Smart Contracts: The Accidental Lawyer Who Found His Edge in Emerging Companies

4’40: Selling Your Soul for Low-Risk Capital: The Case For and Against the JD MBA

9’41: Fake It Till You Make It: How the ICO Craze of 2017 Turned One Niche Bet Into a Crypto Legal Career

13’01: Read the Actual Law: Why Memorizing the Securities Act Beat 20 Years of Legal Precedent in Crypto

18’19: The Crypto Legal Frankenstein: How Regulatory Survival, Not Business Logic, Built the Foundation-Labs-Token Structure

25’16: From Stockholm Syndrome to Meme Coin Mania: The Disorienting Cost of Crypto's Regulatory 180

30’05: The Dichotomy of Success: How Polygon's Most Celebrated Moment Was Secretly Its Most Broken

36’49: All Money on Chain: Why Polygon Is Betting Its Future on Becoming the World's Payments Blockchain

48’29: The channels used to connect with Marc & learn more about Polygon Labs

Disclaimer here — this newsletter does not provide investment advice and represents solely the views and opinions of FINTECH BLUEPRINT LTD.
Contributors: Lex, Laurence, Matt, Farhad, Mike, Daniella
Want to discuss? Stop by our Discord and reach out here with questions.

In this episode, Lex chats with Alex Gluchowski — Cofounder and CEO of Matter Labs, about the transformative impact of zero-knowledge proofs (ZK proofs) on blockchain scalability and privacy. They discuss Matter Labs’ evolution, the development of zkSync, and how ZK proofs enable secure, private, and efficient blockchain transactions.

The conversation explores enterprise adoption, regulatory shifts, and the potential for blockchain to revolutionize global finance by enabling privacy-preserving, interoperable networks anchored to Ethereum, ultimately highlighting the growing role of cryptography in advancing financial sovereignty and innovation.

NOTABLE DISCUSSION POINTS:

Incorruptibility is Blockchain’s Core Value—Not Consensus: Consensus mechanisms solve network liveness without central operators, but the guarantee that your assets can’t be spent without your permission comes from verification. Bitcoin’s “don’t trust, verify” mantra is literal: every node re-executes every transaction. Zero knowledge proofs achieve the same incorruptibility without requiring universal visibility—enabling both scale and privacy.

The Regulatory Shift Has Unlocked an Entirely New Market: The post-Trump regulatory environment represents a “great divide” for crypto. Banks and enterprises that previously couldn’t engage are now actively piloting blockchain infrastructure. Matter Labs is working with Deutsche Bank, UBS, and 35+ global financial institutions through initiatives like Presidio Breakthrough. The focus has shifted from building systems to withstand regulatory hostility to integrating crypto into real business processes.

Private Enterprise Chains Settling on Ethereum is the Institutional Path: Banks experimented with consortium blockchains (Hyperledger, Corda, R3) for years but failed due to privacy concerns—participants could see each other’s transactions. Zero knowledge proofs solve this by enabling private chains that interoperate trustlessly through Ethereum as a shared settlement layer. Each institution maintains sovereignty over its operations while gaining cryptographic guarantees when transacting with counterparties.

TOPICS

Matter Labs, zkSync, Ethereum, Consensys, Hyperledger, Arbitrum, Optimism, fintech, blockchain, zero-knowledge proofs, ZK proofs, privacy, institutional adoption, scalability, cryptography, interoperability

 

ABOUT THE FINTECH BLUEPRINT

🔥Subscribe to the Fintech Blueprint newsletter to stay at the forefront of Fintech and DeFi: https://bit.ly/3hyhlC2

🤝 Partner with Fintech Blueprint through sponsorships: https://bit.ly/3UZllsV

👉 Twitter: https://twitter.com/LexSokolin

 

TIMESTAMPS

1’14: The Incorruptibility Problem: Why Zero Knowledge Proofs Are the Only Path to Private, Scalable Finance

5’19: From Soviet Ukraine to Zero Knowledge: How Hyperinflation and a Hunger for Freedom Built a Crypto Visionary

14’07: Freedom Has a Cost: Squaring Crypto's Libertarian Promise With a Decade of Market Abuse

17’11: The Post-Trump Paradigm Shift: Why Stablecoins Are the Shipping Container Moment for Global Finance

25’19: ZK Rollups Demystified: How a Few Kilobytes of Cryptographic Proof Inherit the Full Security of Ethereum

31’38: The Bank Stack of Ethereum: How Zero Knowledge Proofs Finally Solve the Problem Hyperledger and Corda Never Could

37’11: Ethereum as the World's Chronometer: Why Trustless Interoperability Lives or Dies Within a Single Settlement Layer

39’46: The channels used to connect with Alex & learn more about Matter Labs

Disclaimer here — this newsletter does not provide investment advice and represents solely the views and opinions of FINTECH BLUEPRINT LTD.
Contributors: Lex, Laurence, Matt, Farhad, Mike, Daniella
Want to discuss? Stop by our Discord and reach out here with questions.

In this episode, Lex chats with Yoshi Yokokawa, CEO of Alpaca — a brokerage infrastructure company that provides API-based trading and custody services to fintechs and developers globally.

The conversation begins with their shared experience at Lehman Brothers during the 2008 financial crisis, where Yoshi worked in fixed income securitization and learned that even when market participants sense a bubble, they keep dancing because timing the exit is impossible. After Lehman's collapse, Yoshi pursued entrepreneurship, building a computer vision AI company acquired by Kyocera before founding Alpaca in 2017. Initially inspired by Robinhood, Yoshi pivoted after experiencing firsthand the friction of accessing brokerage infrastructure—realizing the deeper opportunity was building API-first brokerage rails for developers. Today Alpaca powers 9 million accounts through 300+ partners across 45 countries, recently raising $150 million at a unicorn valuation.

The discussion explores how Alpaca follows Robinhood's product roadmap to anticipate partner demand, the challenges of adding crypto, and Yoshi's thesis that finance is undergoing a generational shift from digital to on-chain operations. Lex shares examples of legacy infrastructure dysfunction—from faxing PDFs to TD Ameritrade in 2012 to the Synapse collapse caused by manual CSV uploads—illustrating why Alpaca built its own custody and ledger systems as a path to competing in the $350 trillion global securities custody market.

NOTABLE DISCUSSION POINTS:

Alpaca’s biggest breakthrough was not a better investing app idea, but recognizing that the real bottleneck was brokerage infrastructure. Yokokawa and team initially explored B2C product concepts, but pivoted once they experienced firsthand how painful broker-dealer setup, custody, and clearing integrations were. For readers building fintech, this is a huge lesson: the highest-value opportunity is often the “invisible” infrastructure pain, not the user-facing feature set.

They found product-market fit by starting with a narrow wedge (API for automated traders) and only then expanding into a broader platform (Broker API for fintech apps). Alpaca did not begin by serving large fintechs; it first attracted power users who urgently needed programmable execution, then used inbound demand (“can I build my own Robinhood?”) as proof to build account opening, reporting, and full brokerage APIs. This is a valuable go-to-market pattern for infrastructure startups: win with a sharp use case, then expand into the system of record.

Yokokawa’s core strategic edge is full-stack control of licenses, memberships, and ledger technology rather than relying on legacy vendors. He explicitly ties this to lessons from historical fintech fragility (manual workflows, broken reconciliations, middleware failures) and argues that owning the custody/clearing layer is what makes Alpaca defensible long term. For readers, this is the key takeaway on moat-building in financial services: if you don’t control the ledger and operational core, your product may scale faster at first but remains structurally fragile.

TOPICS

Alpaca, Lehman Brothers, Barclays, Nomura, Neuberger Berman, Blackrock, Robinhood, Interactive Brokers, TD Ameritrade, BNY Mellon, Brokerage infrastructure, API, trading, tokenization, embedded finance, fintech, crypto, web3

 

ABOUT THE FINTECH BLUEPRINT

🔥Subscribe to the Fintech Blueprint newsletter to stay at the forefront of Fintech and DeFi: https://bit.ly/3hyhlC2

🤝 Partner with Fintech Blueprint through sponsorships: https://bit.ly/3UZllsV

👉 Twitter: https://twitter.com/LexSokolin

 

TIMESTAMPS

1’08: From Lehman and Subprime ABS to Alpaca: Yoshi Yokokawa’s Origin Story

4’39: Neuberger’s $120B MBO and Lehman’s Core Lesson: Keep Dancing Until the Music Stops

7’17: From AAA Securitized Demand to Startup Conviction: Yoshi’s Post Lehman Pivot From Asia Institutions to Entrepreneurship

10’59: Computer Vision AI at the Deep Learning Inflection Point: Building a Profitable Startup and Exiting to Kyocera

13’29: Web2 Fintech Tailwinds and Robinhood Inspiration: Searching for the Right Investing Product in 2017

15’23: Mockups to Broker API Pivot: Why Trade Execution Pain Beat User Interview Insights in 12 Months

19’46: API Brokerage Go to Market: Winning Automated Traders First Then Expanding Into Global Fintech Infrastructure

24’25: Broker API Expansion and Early Partners: Midas and GoTrade Validate the Shift to Fintech Infrastructure and Crypto

26’53: Global Broker Demand and Crypto Buildout: Using Robinhood Signals to Drive Multi Asset Infrastructure in One API

29’48: Multi Asset Revenue and the Endgame: 300 Partners 45 Countries 9M Accounts and a $350T Custody Ambition

34’07: Tokenization as the Regime Shift: How On Chain Finance Could Disrupt BNY Mellon and Reshape $350T Custody

37’12: Fax Machines CSV Ledgers and the Case for Web3 Finance: Why Owning the Custody Stack and Ledger Matters

45’37: The channels used to connect with Yoshi & learn more about Alpaca

Disclaimer here — this newsletter does not provide investment advice and represents solely the views and opinions of FINTECH BLUEPRINT LTD.
Contributors: Lex, Laurence, Matt, Farhad, Mike, Daniella
Want to discuss? Stop by our Discord and reach out here with questions.

In this episode, Lex chats to Joseph Chalom, CEO of SharpLink, a Nasdaq-listed leader in digital asset treasury management focused on Ethereum. Joseph shares his journey from BlackRock and the Aladdin platform to pioneering digital asset strategies, including staking and tokenization. The discussion explores the evolution of fintech, the integration of crypto into institutional finance, and the future of decentralized finance (DeFi) and AI-powered financial agents. 

Joseph highlights SharpLink approach to making Ether productive for investors and the growing institutional adoption of blockchain technologies.

NOTABLE DISCUSSION POINTS:

SharpLink’s scale and “productivity” pitch for ETH

We hear that SharpLink (Nasdaq listed since July 2025) has raised a little over $3B in equity, holds ~$3B of ETH, and claims it stakes nearly 100% of its ether—framing itself as a public equities “one click” way to get both ETH upside and yield.

A rare behind the scenes look at BlackRock’s crypto playbook

We get specifics on how BlackRock approached digital assets through three pillars—Circle/USDC reserves, the Coinbase integration (announced Aug 4, 2022) to make crypto trading “boring” for institutions, and tokenization via BUIDL on Ethereum with Securitize, which he calls the largest tokenized fund.

The next wave thesis AI agents + Ethereum rails

Chalom argues the underestimated unlock is autonomous AI agents using Ethereum for programmable settlement, continuously reallocating capital across staking, lending, liquidity, and DeFi while monitoring smart contract risk—replacing manual “yield farming” with always on optimization.

TOPICS

Sharplink, BlackRock, FutureAdvisor, Ethereum, ETH, Buidl, Aladdin, digital assets, treasury management, decentralized finance, tokenization, Bitcoin, AI, AI Agents, Roboadvisors, Autonomous Agents

 

ABOUT THE FINTECH BLUEPRINT

🔥Subscribe to the Fintech Blueprint newsletter to stay at the forefront of Fintech and DeFi: https://bit.ly/3hyhlC2

🤝 Partner with Fintech Blueprint through sponsorships: https://bit.ly/3UZllsV

👉 Twitter: https://twitter.com/LexSokolin

 

TIMESTAMPS

1’05: SharpLink’s Ethereum Treasury: $3B Raised to Make ETH Productive

4’53: BlackRock’s iShares Era and Aladdin Explained: Risk Tech at $14T Scale

9’07: From Aladdin to Robo Advisors: Why 320,000 Advisors Couldn’t Scale

16’32: The FutureAdvisor Culture Lesson: Balancing Product Builders and Institutional Know How

18’31: BlackRock’s Three Pillar Crypto Bet: Circle Coinbase and Tokenization

25’21: Why BlackRock Picked Coinbase: Making Crypto Trading “Boring” and Institutional

28’44: From Six Week Retirement to ETH Treasury: Why SharpLink Holds “Permanent Capital”

34’12: The Treasury Trade After the Hype: Why SharpLink Beats ETH ETFs on Staking

38’55: NAV Discounts and Mean Reversion: SharpLink’s Plan to Double ETH per Share

43’39: Ethereum’s Next Growth Stack: $300B Stablecoins $14T Tokenization and Institutional DeFi

48’23: From Copilots to Autonomous Agents: Ethereum as the Rails for Machine Finance

52’21: The channels used to connect with Joseph & learn more about SharpLink

Disclaimer here — this newsletter does not provide investment advice and represents solely the views and opinions of FINTECH BLUEPRINT LTD.
Contributors: Lex, Laurence, Matt, Farhad, Mike, Daniella
Want to discuss? Stop by our Discord and reach out here with questions.