Why Fintech Giants Are Building Proprietary
Published 6/12/2026, 9:06:25 AM
Key Correction: Only Robinhood is building an L2. Stripe's Tempo and Circle's Arc are both Layer 1 blockchains, not Layer 2s. This architectural distinction matters because L1s offer full control over consensus and settlement, while L2s inherit security from a parent chain.
The Market Opportunity
The stablecoin market has reached critical mass, creating compelling incentives for payment companies to build proprietary infrastructure:
- $273 billion in global fiat-backed stablecoin supply (March 2026)
- $10.9 trillion in adjusted stablecoin transaction volumes in 2025 (91% year-over-year growth)
- USDC circulation grew to $78.1 billion (May 2026)
- Tokenized real-world assets projected to grow from $0.6 trillion today to $18.9 trillion by 2033 (53% CAGR)
Stripe: Owning the Payment Rail
Blockchain: Tempo (Layer 1, mainnet launched March 2026)
Stripe is pursuing full vertical integration across the stablecoin stack. The company acquired Bridge for $1.1 billion (stablecoin orchestration), Privy for embedded wallet infrastructure (75 million+ accounts), and Metronome for usage-based billing metering. Tempo is designed as a payments-optimized L1 with 100K+ TPS, sub-second finality, EVM compatibility, and stablecoin-as-gas with fixed predictable fees.
Strategic Rationale: Stripe aims to "own the payment rail" rather than rent existing infrastructure. The company processes $1.4 trillion in total payment volume (2024), with stablecoin transaction volume growing 30% month-over-month.
Circle: Controlling the Monetary Layer
Blockchain: Arc (open Layer 1 purpose-built for stablecoin finance, testnet launched October 2025)
Circle is vertically integrating from stablecoin issuer to infrastructure provider. Arc is designed as the "Economic OS for the internet" with USDC as native gas, built-in FX engine, instant finality, and opt-in privacy. The Circle Payments Network (CPN) connects 55 institutions for real-time global stablecoin payments ($5.7 billion annualized TPV).
Strategic Rationale: Circle's strategy captures value across the entire stablecoin stack — earning seigniorage on USDC issuance while also owning the settlement rails. The company reports ~99% of measured agentic AI payments are conducted in USDC, positioning Circle as the default stablecoin for AI agent commerce. With the GENIUS Act (US) and MiCA (EU) providing regulatory clarity, Circle's compliance-first approach creates significant barriers to competitors.
Robinhood: Bringing Crypto to 24 Million Existing Users
Blockchain: Robinhood Chain (Layer 2 built on Arbitrum's Orbit framework, testnet launched February 10, 2026)
Strategic Rationale: Robinhood chose an L2 approach specifically to inherit Ethereum's security, decentralization, and EVM liquidity rather than bootstrapping a new network from scratch. CEO Vlad Tenev explained: "The main discussion for us was should we do an L1 or should we do an L2, and the reason why we decided to do an L2 was we wanted to get the security from Ethereum, the decentralization from Ethereum, and also the liquidity that is part of the EVM space."
Robinhood's key strategic advantage is its 24 million existing users — bringing crypto capabilities to an existing base rather than hoping to onboard users onto existing chains. The company tokenized approximately 2,000 US stocks and ETFs on-chain (~$17 million total value), with plans to include private companies like OpenAI and SpaceX. Robinhood's crypto transaction revenues surged 154% year-over-year to $680 million in the first nine months of 2025.
Why L1 vs. L2? The Architectural Choice
| Company | Blockchain | Type | Primary Reason |
|---|---|---|---|
| Stripe | Tempo | L1 | Full control over payment rail, stablecoin gas, regulatory hooks, and fee structures |
| Circle | Arc | L1 | Capture settlement economics, own the monetary layer, integrate FX/treasury workflows |
| Robinhood | Robinhood Chain | L2 | Inherit Ethereum security and EVM liquidity without bootstrapping trust from scratch |
The Five Strategic Drivers
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Vertical Integration & Value Capture: Owning blockchain infrastructure captures transaction fees, validator rewards, staking yield, and protocol-level MEV currently paid to third parties.
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Stablecoin-Native Design: Payment-optimized L1s provide instant finality, predictable fees, and regulatory hooks that general-purpose L2s cannot match.
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Competitive Moat: Owning payment rails creates switching costs for merchants and partners, data advantages on transaction patterns, network effects, and standards control.
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AI Agent Commerce: New use cases require blockchain-native payment flows for AI agents spending user funds with delegated budgets, micropayments for API usage, and streaming payments.
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Regulatory Positioning: Purpose-built chains can embed KYC/AML at the protocol level, respond to GENIUS Act (US) and MiCA (EU) frameworks, and create compliance moats that startups cannot easily replicate.
Key Data Points
| Metric | Stripe | Circle | Robinhood |
|---|---|---|---|
| Blockchain | Tempo (L1) | Arc (L1) | Robinhood Chain (L2) |
| Launch Status | Mainnet (March 2026) | Testnet (Oct 2025) | Testnet (Feb 10, 2026) |
| Throughput | 100K+ TPS | ~1.5M wallets, 150M+ txns | 100ms block times |
| Key Partners | Visa, Deutsche Bank, Paradigm | Visa, BlackRock, BNY Mellon | Arbitrum, Ethereum |
| Core Revenue Driver | $1.4T payment volume | $78.1B USDC supply | $680M crypto revenue (9M 2025) |
| User Base | 75M+ (Privy) | 6.8M meaningful wallets | 24M existing users |
Evidence Gaps
- Stripe/Circle L2 claim: Both companies are building L1s, not L2s. The user's premise requires correction.
- Specific source URLs: The research output references "Web search results" generically without providing verbatim URLs. The Yahoo Archive links in the claims ledger point to search page archives rather than specific articles, making direct citation impossible.
Conclusion
Stripe, Circle, and Robinhood are building proprietary blockchain infrastructure to capture value in the rapidly expanding stablecoin and tokenized asset markets — but only Robinhood is building an L2. Stripe and Circle chose L1s for maximum control over payment rails and settlement economics, while Robinhood chose an L2 specifically to inherit Ethereum's security and liquidity for its existing 24-million-user base. What remains open is whether these vertically integrated approaches will succeed against general-purpose chains, or whether the market will consolidate around interoperable standards.