Author: Benji Siem, IOSG Ventures

Introduction

Stripe acquired Bridge for $1.1 billion. Mastercard acquired Zerohash for ~$2 billion. Robinhood launched its own L2.

These are not isolated bets—they signal a structural shift: the largest fintech giants are embedding blockchain infrastructure, stablecoins, and decentralized finance (DeFi) rails directly into their core products. Over the past decade, fintech firms transformed payments, banking, and investing through software-native platforms and massive digital distribution. The next phase has begun: crypto is becoming the backend.

This report analyzes the digital finance strategies of ten leading fintech companies, focusing on their business models, revenue drivers, and approaches to integrating crypto payments and DeFi infrastructure.

A consistent pattern emerges: the most successful companies treat crypto not as a speculative asset but as backend infrastructure that accelerates settlement, reduces costs, and expands global financial connectivity. Stablecoins, in particular, are increasingly serving as bridges between traditional finance (TradFi) and onchain markets.

Fintech Industry Insights

Consensus on Digital Finance: How Different Players View the Opportunity

The digital finance foundation of these ten companies can be summarized as:

“Financial services should be borderless, real-time, software-defined, composable—and regulatory compliance should be invisible to end users.”

How different types of players interpret the opportunity:

Infrastructure Players (Visa, Mastercard, Stripe, Adyen)

· Core view: Transform the underlying pipes of money movement—but do not hold customer relationships

· Opportunity: Every new payment rail (stablecoins, account-to-account/A2A, instant payments) expands the total addressable market

· Crypto entry point: Stablecoins reduce settlement friction and enable 7×24 treasury management

Consumer Platforms (Nu, Revolut, PayPal, Cash App)

· Core view: Own users’ primary financial entry point and cross-sell bundled services

· Opportunity: Bundle banking + payments + investing + crypto into a single app to increase lifetime value (LTV)

· Crypto entry point: Treat crypto as a layer to boost engagement and monetization (trading fees, yield products, cross-border)

Hybrid Players (Robinhood, Block, SoFi)

Aggregators bid capacity across multiple markets:

· Core view: Vertical integration across consumer-facing products and infrastructure

· Opportunity: Capture profit across multiple layers (consumer engagement, B2B infrastructure, asset custody)

· Crypto entry point: Dual-sided crypto strategy (consumer distribution + infrastructure ownership)

Key Trends in Fintech

Based on analysis of these ten leading companies, several clear patterns emerge. These constitute the central theses of this report; subsequent company case studies and the integration playbook serve to validate them.

Infrastructure-First, Not Speculation-First

Virtually all companies treat crypto as backend infrastructure—not frontend speculation. Visa, Mastercard, Stripe, and Adyen are upgrading their settlement layers with stablecoins while keeping consumer experiences unchanged. Crypto succeeds only when it’s “invisible.” This is the most consistent pattern across all ten companies—and underpins every subsequent integration strategy.

Stablecoins Are the “Bridge Asset”

Every company engaging with crypto is betting on stablecoins as the transitional layer between TradFi and crypto:

· Visa: USDC settlement on Solana; 130+ stablecoin card programs

· Mastercard: Supports four stablecoins—USDC, PYUSD, USDG, and FIUSD—across multiple chains

· Robinhood: Partners with USDG and shares revenue

· PayPal: Launched its own PYUSD, internalizing settlement

· Stripe: Uses USDC for cross-border merchant payouts

Stablecoins compress settlement time, reduce FX friction, and enable programmable treasury management—all without volatility exposure.

“Regulated Distribution” as a Moat

Companies with massive user bases (PayPal: 400M, Revolut: 50M+, Nu: 122M, Cash App: 58M) position themselves as compliant on/off-ramps—not protocol builders. Their competitive advantage lies not in technology, but in trust, regulatory compliance, and scaled distribution.

DeFi Is Wholesale, Not Retail

No company exposes native DeFi protocols directly to end users. Instead, DeFi exists as a wholesale backend: a source of yield (tokenized Treasuries, money markets), liquidity optimization (faster settlement, cheaper cross-border flows), and product packaging (regulated savings accounts backed by DeFi yield). DeFi becomes infrastructure supporting regulated products—not a user-facing experience. This foundational premise shapes the integration opportunities and investment themes outlined later in this report.

Multi-Rail Strategy

Companies are building infrastructure agnostic to payment method:

· Stripe: “I want that layer of programmable money—regardless of which rail it travels on.”

· Mastercard: A “multi-rail company,” covering cards, A2A, real-time payments, and blockchain

· Adyen: “The global operating system for enterprise payments”

As payment methods fragment further (cards, A2A, stablecoins, BNPL), winners will be those able to intelligently route across all rails.

Convergence Point

Winning strategies distill to: becoming the compliant wrapper for programmable money—capturing value via distribution, trust, and compliance—not by holding protocols or exposing speculative risk.

Most advantaged companies possess at least one of the following: large-scale distribution (Nu, PayPal, Revolut, Cash App), infrastructure control (Visa, Stripe, Mastercard), or vertical integration (Robinhood, Block, SoFi).

Good vs. Bad Models

Scalable and Defensible Business Models

The “Tollbooth” Model for Payment Networks (Visa, Mastercard)

· Near-zero marginal cost per transaction; massive fixed-cost leverage; network effects nearly unassailable.

· Essentially infinitely scalable: each new transaction increases revenue, but incremental cost is near zero.

· Crypto integration risk: In theory, stablecoins and A2A payments could bypass card networks—but Visa and Mastercard counter by positioning themselves as the “network of networks,” sitting atop all rails—including crypto.

Infrastructure-as-a-Service (Stripe, Adyen)

· Once embedded into a merchant’s tech stack, switching costs are extremely high; revenue compounds with merchant growth; value-added services (fraud prevention, tax, billing) continually lift ARPU.

· Stripe processed $1.4 trillion in 2024 (≈1.3% of global GDP).

· Stripe’s Bridge/Tempo bet represents the most aggressive infrastructure play today. If stablecoin payment volume scales, Stripe could capture the developer layer of crypto-native commerce.

Recurring Revenue + Float (Coinbase Subscriptions & Services, Revolut Premium)

Revenue from stablecoin reserve interest (e.g., Coinbase earned $332.5M from USDC alone in Q4 2025), staking rewards, and subscription fees is far more stable than trading commissions.

Revenue scales with assets under management (AUM)/assets under custody (AUC), not just transaction volume—making it more predictable.

Low-Cost Digital Banking for Underbanked Markets (Nubank)

Monthly servicing cost: just $0.80 vs. $5–10+ for traditional banks; monthly active rate: >83%; net interest margin: 17.7%.

In underbanked markets, customer acquisition is nearly viral; 122.7M customers offer enormous cross-selling potential.

Higher-Risk / Less-Scalable Models

Pure Transaction-Fee Dependence

· Companies deriving >90% of revenue from trading fees are entirely at the mercy of market cycles. Trading volumes may drop 70–90% during crypto bear markets.

· Diversification is critical: Coinbase’s trading revenue share fell from 96% in 2020 to an expected 59% in 2025. Robinhood now operates 11 business lines.

PFOF (Payment for Order Flow) Dependence

· PFOF is banned in the EU and under sustained scrutiny in the U.S. Companies dependent on PFOF face existential regulatory risk to their core revenue model.

· Better path: Shift toward subscriptions (Robinhood Gold), interest income, and institutional clients (e.g., Bitstamp acquisition).

Crypto Businesses Without Recurring or Sticky Revenue

· Spot-trading-only exchanges—with no staking, no stablecoin yield, no custody, no DeFi protocol revenue, and no subscriptions—are highly pro-cyclical businesses.

· Strong crypto business models layer multiple revenue streams (trading + staking + yield + protocol fees + subscriptions).

Unprofitable “Bitcoin Revenue Line”

· Block reported $1.97B in Bitcoin revenue in Q3 2025—but Bitcoin cost of revenue was $1.89B, yielding just ~4% gross margin on BTC channel revenue. It inflates top-line revenue but contributes minimally to gross profit.

· Its strategic value lies in ecosystem lock-in (higher user stickiness for BTC buyers in Cash App), not direct BTC profitability.

Framework: What Makes a “Good” Crypto-Fintech Business Model?

Fintech Crypto Integration Playbook

The playbook below outlines how the ten companies execute the above fundamentals. To understand why these approaches work, refer back to the “Key Trends” section.

Stablecoin Integration (Most Common, Fastest-Moving)

· Visa: USDC settlement within its network

· Mastercard: Card partnerships with OKX; acquisition of Zerohash

· PayPal: Launched its own PYUSD ($3.6B in circulation); supports DeFi usage

· Stripe: $1.1B acquisition of Bridge for stablecoin orchestration; building Tempo L1

· Coinbase: Co-issuer/partner on USDC; expects $1.4B in stablecoin revenue in 2025

Embedding Crypto Trading as a Feature

· Robinhood: Native integration of crypto trading with stocks/options

· Revolut: In-app trading of 200+ tokens

· Nubank: NuCripto

· Block/Cash App: Buy, sell, and transfer Bitcoin

Low incremental cost; captures retail demand during bull markets; deepens user stickiness.

Building Blockchain Infrastructure In-House

· Coinbase → Base Chain (OP Stack-based L2)

· Stripe → Tempo (L1, built with Paradigm)

· Robinhood → Robinhood Chain (Arbitrum-based L2)

Owning the chain = owning the economics (sequencer fees, MEV, ecosystem network effects). Analogous to Visa building VisaNet itself—not relying on third-party networks.

Full-Stack Bitcoin Strategy (Block’s Approach)

Consumer wallet (Cash App) → Merchant acceptance (Square Bitcoin/Lightning) → Self-custody (Bitkey) → Mining (Proto) → Open-source development (Spiral).

This is a high-conviction vertical bet: If Bitcoin truly becomes a daily payment rail, Block owns every layer; if not, it’s a large, uncertain capital commitment.

Custody & Institutional Services

· Coinbase Prime: Custodian for most U.S. spot Bitcoin/Ethereum ETFs

· Mastercard & Visa: Provide compliant KYC/AML layers for institutional crypto adoption

Institutional capital demands trusted, regulated custody—a high-barrier, high-margin business.

DeFi On/Off-Ramps & Protocol Participation

· PayPal: PYUSD supports DeFi lending/trading on Ethereum

· Coinbase: Base Chain hosts DeFi protocols; USDC dominates DeFi as the leading stablecoin

· Revolut & Robinhood: Staking services (ETH, SOL)

Integration Opportunities for Crypto Payments & DeFi

Upstream (Wholesale / Infrastructure Layer)

Stablecoin Settlement Networks

Using stablecoins for interbank settlement, treasury management, and merchant payouts. Settlement time shrinks from T+2 to near-real-time, reducing correspondent banking costs.

· Beneficiaries: Visa, Mastercard, Stripe, Adyen

· Example: Visa uses USDC on Solana to settle VisaNet obligations

Tokenized Money Markets as Liquidity

Using tokenized Treasuries (e.g., Ondo OUSG, Franklin OnChain) as yield-bearing reserves—preserving liquidity while avoiding credit risk.

· Beneficiaries: PayPal, Nu, Revolut, SoFi

· Example: Mastercard MTN supports tokenized Treasury assets

Cross-Border Remittance Rails

Replacing SWIFT/correspondent banks with stablecoin rails for B2B and retail remittances. Instant settlement, lower fees, better FX rates.

· Beneficiaries: Stripe, PayPal (Xoom), Revolut, Nu

· Example: Stripe enables USDC payouts for global merchants

Programmable Compliance Layer

Smart-contract-based AML/KYC, transaction monitoring, and sanctions screening. Automated compliance, reduced manual effort, real-time risk scoring.

· Beneficiaries: All regulated players (especially Visa and Mastercard, which sell value-added services)

· Example: Visa Protect for A2A payments, Mastercard Crypto Secure

Downstream (Consumer / Merchant Layer)

Stablecoin-Linked Cards

Cards that spend directly from stablecoin balances, converting to fiat at the point of sale.

· Beneficiaries: Visa, Mastercard (infrastructure), Revolut, Cash App (distribution)

· Example: Visa’s 130+ stablecoin card programs, Mastercard OKX Card

Crypto-Collateralized Lending

Using crypto assets as collateral for fiat loans—without triggering taxable events.

· Beneficiaries: Robinhood, SoFi, Block, Revolut

· Example: Bitcoin-backed loans offered via Cash App or SoFi

Yield-Bearing Savings Accounts

High-yield savings products backed by tokenized Treasuries or DeFi lending protocols—delivered via compliant wrappers.

· Beneficiaries: Nu, Revolut, PayPal, SoFi

· Example: Revolut’s “crypto earn” products offering returns close to staking yields

Merchant Stablecoin Settlement

Enabling merchants to settle in stablecoins instead of fiat—reducing FX risk and accelerating payouts.

· Beneficiaries: Stripe, Adyen, Square, PayPal

· Example: Mastercard enables merchants to settle in USDC, PYUSD, or USDG via Nuvei/Circle

Instant Cross-Border P2P

Stablecoin-powered remittances—settling in seconds, fees <1%. Pressuring Western Union/MoneyGram in LatAm and Asia.

· Beneficiaries: PayPal (Xoom), Revolut, Cash App, Nu

· Example: Nu’s LatAm transfers: BRL → USDC → local currency

Differentiated / High-Margin Niche Opportunities

Self-Custody Wallet-as-a-Service

White-label self-custody solutions for institutions and high-net-worth individuals. Generates custody fees while meeting self-custody compliance requirements.

· Beneficiaries: Robinhood (Bitkey), Block, Stripe (via Bridge)

· Example: Block’s Bitkey hardware wallet

Blockchain-Based Loyalty Programs

Issuing points as tokens—enabling cross-ecosystem redemption. Boosts stickiness and creates new tokenized-rewards revenue.

· Beneficiaries: Mastercard, Visa, PayPal

Institutional DeFi Protocol Integration (High Potential)

Providing regulated access to DeFi lending, staking, and liquidity mining for institutions—via compliant middleware.

· Beneficiaries: SoFi (Galileo), Stripe (Bridge), Mastercard (MTN)

· Example: SoFi Galileo offers white-label crypto staking for banks

Privacy-Preserving Payments

Using zero-knowledge proofs to enable “private yet compliant” stablecoin transfers. Supports confidential corporate payments while satisfying AML compliance.

· Beneficiaries: All companies (especially B2B-focused Visa/Mastercard)

Unbundling-Rebundling: Structural Perspective

Linking to insights from another report: The Architecture of Value: Structural Evolution of Financial Innovation and Deep Dive Report on Venture Capital Strategies

(https://claude.ai/30284df5d6ec8003aa52f792bb549832?pvs=25)

Winners of Rebundling Are Infrastructure Providers, Not Consumer Platforms

The most durable, scalable fintech businesses let others do the bundling—rather than bundling themselves:

Infrastructure players (Visa, Mastercard, Stripe, Adyen)

· 90–98% gross margins, 50–62% operating margins

· Near-zero customer acquisition cost (CAC) (developers/banks bring users)

· Moats: network effects or developer lock-in

· Revenue grows with ecosystem expansion—not direct user acquisition

Consumer platforms (Robinhood, Nu, Revolut, PayPal):

· 30–50% gross margins, 10–25% operating margins

· CAC of $200–$450

· Must achieve adoption of ≥3 products to become profitable

· More vulnerable to regulatory shifts and market cycles

Visa earns 97.8% gross margin on $17T in payment volume, while Robinhood’s crypto trading revenue is cyclical—this contrast reveals their fundamental divergence.

Three Key Dependencies Determining Rebundling Success

Dependency 1: Funding Source (Bank Charter = Compounding Moat)

· Winners: Nu ($19B in deposits, 3–4% funding cost, 17.7% net interest margin), SoFi (bank charter enables deposit-taking)

· Losers: PayPal (no charter, cannot take deposits), Revolut (UK charter delayed, unable to compete in lending)

Consumer fintechs without bank charters are either beholden to BaaS partners (e.g., Synapse’s 2024 collapse) or unable to internalize the “deposit–lending” spread—the very engine of rebundling profitability.

Dependency 2: Cross-Selling Economics (≥3 Products Threshold)

· Single-product users (annual revenue $50, LTV $150) lose money against a $200–$450 CAC. Three-product users (annual revenue $180, LTV $540) begin generating profit.

· Success cases: Robinhood (11 products, ARPU $191, +82% YoY), Revolut (wealth revenue +298%), Nu (83% cross-product monthly active rate)

· Failure case: PayPal (400M users, but most use checkout only; Venmo/crypto/savings cross-selling stalls)

Dependency 3: Developer / Enterprise Lock-In (Depth of Integration)

· Stripe’s moat: Once Billing + Tax + Connect + Radar are integrated, dismantling takes ≥6 months of engineering effort. Each additional product compounds switching cost.

· Visa’s “chaordic” genius: 20,000 banks compete for customers (decentralized), yet all run on Visa’s protocol (centralized). Banks cannot leave—because the network itself *is* the product. Zero CAC, 97.8% gross margin, collecting tolls on $17T in transaction volume.

Structural challenges for consumer crypto include: custodial liability, compressed margins (Uniswap 0.3% vs. Coinbase 1–2%), lack of lock-in (users can self-custody and withdraw), and strong pro-cyclicality (Coinbase revenue fell 75% in 2022–2023).

Foundations for Crypto Success: Becoming the “Stripe / Visa for Stablecoins”

Common patterns among successful fintech cases are clear: build compliant middleware that abstracts away blockchain complexity for enterprises and fintech clients.

Investment Theme 1: Stablecoin Orchestration Layer

· Stripe’s $1.1B acquisition of Bridge proves one thing: enterprises want stablecoin settlement—but don’t want to run nodes, manage wallets, or navigate 50-state licensing.

· Winning product: An API that handles multi-chain routing, liquidity optimization, compliance screening, and tax reporting. Enterprises simply call POST /transfer—the infrastructure handles everything else.

· Economic model: 0.5–1% take rate on massive transaction volume; zero marginal cost per transaction; extremely high switching cost once integrated. Same >90% gross margin—but applied to a $2T+ stablecoin settlement market.

Investment Theme 2: Vault-as-a-Service (“Fireblocks”-Style)

PayPal, Robinhood, and Nu each hold billions in crypto assets. Custody requires OCC compliance, MPC/HSM security, $100M+ insurance, and disaster recovery.

· Opportunity: Deliver “AWS for crypto custody”—enterprises integrate via API; provider handles key management, policy engines (e.g., “withdrawals >$100K require 3 approvals”), compliance reporting, OFAC screening.

· Every fintech adding crypto needs it

· Zero CAC (B2B sales cycle)

· High retention (switching custodians = 12+ months of security audits)

· Winners: Fireblocks ($8B valuation), Anchorage Digital (OCC-licensed), Copper.co

Investment Theme 3: DeFi Middleware / “Vault Curator” Layer

What’s missing today is a “Stripe for DeFi yield”: a service that aggregates yield across Aave, Compound, Morpho, and tokenized Treasuries (e.g., Ondo OUSG), while abstracting gas fees, generating IRS-compliant tax reports (1099s), and providing insurance wrappers and compliance layers.

Vault curator opportunities:

· Ondo Finance: Tokenized Treasuries, 5% yield

· Backed Finance: Tokenized corporate bonds

· Maple/Goldfinch: Institutional-grade DeFi lending with underwriters

Concrete example: SoFi holds billions in deposits earning 0–1% in traditional accounts. If its B2B platform Galileo offered a “DeFi Yield API” accessing 5% tokenized Treasuries, SoFi could pay customers 4% APY, keep 1% spread—and avoid putting assets on its balance sheet. This middle-layer approach—sitting between protocols and regulated fintechs, handling compliance wrappers and tax reporting—is the current whitespace.

Framework: Evaluating Fintech Business Models

Summary Table

Company-level alignment of crypto integration and foundational strategy

Conclusion

The future of fintech lies in the fusion of traditional financial platforms with programmable financial infrastructure. Blockchain technology isn’t replacing existing systems—it’s increasingly being integrated as a backend settlement and liquidity layer operating behind the scenes. Stablecoins, tokenized assets, and onchain markets deliver faster settlement, cheaper cross-border payments, and novel financial products—all largely invisible to end users.

Ultimately, those best positioned to capture value in digital finance are companies that simultaneously command large-scale distribution, regulatory trust, and infrastructure control. Whether through payment networks, developer platforms, or consumer financial ecosystems, winners will be those platforms that both abstract away financial complexity and orchestrate across multiple payment rails. As programmable money gains broader adoption, fintech companies that successfully bridge traditional finance and blockchain infrastructure will define the next generation of global financial services.