Three of the world's largest fintech platforms — Stripe, Robinhood, and Toss — are building proprietary blockchain infrastructure rather than relying on existing public chains for their payment and asset settlement needs. Stripe's Tempo Layer 1 launched on mainnet March 18, 2026, with 100+ integr...
"Growth in the AI industry and the increasing use of stablecoins were the main drivers." — John Collison, Co-Founder, Stripe
Three of the world's largest fintech platforms — Stripe, Robinhood, and Toss — are building proprietary blockchain infrastructure rather than relying on existing public chains for their payment and asset settlement needs. Stripe's Tempo Layer 1 launched on mainnet March 18, 2026, with 100+ integrated service providers. Robinhood Chain, an Arbitrum-based Layer 2, logged 4 million testnet transactions in its first week after launching February 10. South Korean super-app Toss, which generated $1.8 billion in 2025 revenue, disclosed plans for its own chain at the Seoul Blockchain Meetup on March 12.
These are not crypto-native projects. They are regulated financial companies with a combined user base exceeding 130 million, processing trillions of dollars annually through traditional rails. Their decision to build dedicated chains — rather than adopt existing ones — signals a structural shift in how payment volume may flow through blockchain infrastructure. The economic question is whether this vertical integration captures value that currently accrues to general-purpose Layer 1 and Layer 2 networks, or creates an entirely new settlement layer parallel to the existing crypto ecosystem.
Stripe processed $1.9 trillion in total payment volume in 2025, a 34% year-over-year increase, according to the company's annual letter published in early 2026. That figure represents approximately 1.6% of global GDP. The company's valuation reached $159 billion following a February 2026 tender offer, up from $106.7 billion the prior year. Stripe serves 5.5 million businesses globally.
On March 18, 2026, Stripe and Paradigm launched Tempo, a purpose-built Layer 1 blockchain designed for high-volume stablecoin payments. The chain targets 100,000+ transactions per second with sub-second finality — specifications that, if achieved at scale, would exceed Ethereum's roughly 20 TPS and Solana's practical throughput of several thousand TPS by orders of magnitude.
The mainnet launched with a payments directory of more than 100 integrated service providers, including Alchemy, Dune Analytics, Anthropic, OpenAI, and Shopify. Design partners that participated in pre-launch testing included Deutsche Bank, Ramp, Mastercard, Nubank, Revolut, Standard Chartered, and Visa.
Alongside the mainnet, Tempo introduced the Machine Payments Protocol, co-developed with Stripe, enabling autonomous machine-to-machine transactions. The protocol allows AI agents and software applications to pay for services — such as compute, data, or API calls — without human approval at each step. Anthropic, OpenAI, and DoorDash are listed as partners.
The economic logic is straightforward. Stripe's revenue suite, which includes Billing, Invoicing, and Tax, is on track to reach a $1 billion annual run rate in 2026. Routing even a fraction of $1.9 trillion in payment volume through a proprietary blockchain — where Stripe controls fee structures, settlement speed, and compliance layers — creates a vertically integrated stack that bypasses the fee economics of existing public chains.
Post-launch performance data for Tempo's actual transaction volume and throughput in production has not yet been publicly reported. The chain's target specifications remain unvalidated at scale.
Robinhood first announced plans for its own blockchain in June 2025, alongside the launch of tokenized U.S. stocks and ETFs for European users on Arbitrum. By December 2025, the company had deployed approximately 2,000 tokenized securities on Arbitrum, with cumulative mint volume reaching $55.5 million. U.S. stocks comprised 73% of deployed tokens, with ETFs at 24%.
On February 10, 2026, Robinhood launched Robinhood Chain as a public testnet — an Ethereum Layer 2 built on Arbitrum Orbit technology. The testnet processed 4 million transactions in its first week. Infrastructure partners integrated at launch included Alchemy, Chainlink, LayerZero, and TRM Labs.
The chain is designed to support 24/7 trading of tokenized stocks, ETFs, and other assets through both Robinhood's self-custody crypto wallet and its main brokerage application. The company committed $1 million to the 2026 Arbitrum Open House program to support builder events across New York, Dubai, London, and Singapore ahead of a planned mainnet launch later in 2026.
Unlike Stripe's full Layer 1 approach, Robinhood chose to build on Arbitrum's existing technology stack, inheriting Ethereum's security guarantees while customizing the execution environment for financial-grade settlement. This is a meaningful architectural distinction. Robinhood's approach leverages Ethereum's existing validator set and security budget, while Stripe's Tempo must bootstrap its own consensus mechanism and validator economics.
The tokenized equity portfolio on Arbitrum surpassed $13 million in market capitalization. These products are currently limited to European Union and European Economic Area customers, though expansion is anticipated.
Viva Republica's Toss operates as South Korea's dominant financial super-app with 30 million registered users and approximately 24 million monthly active users. The platform offers roughly 290 services spanning payments, banking, securities, and lending — all under integrated financial licenses.
Financial performance has been strong. Toss generated approximately $1.8 billion in revenue in 2025, up 38% year-over-year. Operating profit surged 270% to approximately $251 million, and net profit jumped 847% to roughly $151 million. The company is reportedly planning a U.S. IPO as early as Q2 2026, targeting a valuation above $10 billion, with potential to reach $15 billion depending on market conditions.
At the Seoul Blockchain Meetup Conference on March 12, 2026, Toss's Managing Director Seo Chang-hoon disclosed the company's "Money 3.0" strategy. The plan envisions programmable money that is "universal, programmable, verifiable, composable and seamless." Toss is evaluating whether to build a standalone Layer 1 network or pursue a Layer 2 architecture. The company has registered 24 stablecoin-related trademarks.
The decision is directly linked to South Korea's Basic Law on Digital Assets, a pending legislative framework expected to codify rules for token issuance, stablecoins, and crypto ETFs. The law's provisions on whether stablecoin issuance will be restricted to bank-led consortia or open to independent fintechs will determine whether Toss can issue a Korean won-denominated stablecoin on its own infrastructure.
Toss has also begun its global expansion, starting with Australia, which positions any blockchain infrastructure it builds for cross-border payment flows — a use case where stablecoin settlement could directly compete with traditional correspondent banking and existing cross-border payment networks.
Not every fintech is building from scratch. Revolut and PayPal illustrate the alternative approaches.
Revolut — valued at potentially $100 billion or more in early-stage discussions for a secondary share sale — crossed $1.2 billion in cumulative on-chain transaction volume on Polygon as of March 2026, according to Polygon Labs. That figure nearly doubled the $690 million reported when the integration was formally announced in November 2025. The transactions represent production usage with real users — Revolut's 65 million customers — not testing. The cost efficiency is notable: Revolut processed $1.2 billion in stablecoin transfers paying less than $700 in total network fees.
Rather than building its own chain, Revolut is embedding deeper into Polygon's infrastructure. The UK's Financial Conduct Authority selected Revolut for its regulatory sandbox to pilot a pound-denominated stablecoin.
PayPal expanded PYUSD, its dollar-backed stablecoin, to 70 markets on March 17, 2026. PYUSD's market capitalization has quintupled over the past year to approximately $4.1 billion, though this remains a fraction of USDT's $184 billion and USDC's $80 billion. PayPal operates across Ethereum and Solana rather than proprietary infrastructure, offering 4% rewards on PYUSD held in the PayPal app.
The spectrum runs from full vertical integration (Stripe building a Layer 1) through customized Layer 2 (Robinhood on Arbitrum) to deployment on existing chains (Revolut on Polygon, PayPal on Ethereum/Solana). Each approach reflects different calculations about where economic value accrues and what infrastructure a fintech needs to control.
The aggregate numbers are substantial. Combined, the five companies discussed — Stripe ($1.9T payment volume), Robinhood (24 million funded accounts), Toss (30 million users), Revolut (65 million users), and PayPal (400+ million accounts) — represent a user base and transaction volume that dwarfs most crypto-native ecosystems.
If even a small percentage of this activity migrates to proprietary or semi-proprietary blockchain rails, the implications for existing networks are material:
Fee revenue displacement. Ethereum L1 and L2 networks generated approximately $2.4 billion in total fees in 2025. Stripe's Tempo alone, routing a fraction of its $1.9 trillion through its own chain, could create a parallel fee economy that bypasses Ethereum entirely. Revolut's experience on Polygon — $1.2 billion settled for under $700 in fees — demonstrates the extreme cost efficiency that purpose-built or low-fee chains offer relative to general-purpose networks.
Liquidity fragmentation. Each proprietary chain creates its own settlement environment. Robinhood's tokenized stocks settle on its Arbitrum L2. Stripe's payments settle on Tempo. If Toss builds its own chain, Korean won stablecoin liquidity concentrates there. Bridging infrastructure (LayerZero, Chainlink) becomes more critical, but each walled garden retains significant value internally.
Validator and staker economics. Ethereum's security model depends on fee revenue and MEV flowing to validators and stakers. If high-value payment flows are siphoned into fintech-controlled chains, the economic security budget of general-purpose networks could face pressure over time. This is not an immediate concern — Ethereum's staking yield is currently subsidized by issuance — but it represents a long-term structural risk if the trend accelerates.
The regulatory environment is pushing fintechs toward proprietary infrastructure. Compliance requirements — KYC, AML, sanctions screening, transaction monitoring — are easier to enforce when you control the chain. Stripe's Tempo integrates TRM Labs for compliance at the protocol level. Robinhood, as a regulated broker-dealer, requires deterministic settlement guarantees that public mempools cannot provide.
In South Korea, the Basic Law on Digital Assets will determine whether fintechs like Toss can issue stablecoins independently or must partner with bank-led consortia. In the EU, MiCA enforcement is creating compliance requirements that favor entities with integrated technology stacks. In the U.S., the SEC-CFTC coordination framework published in March 2026 provides a clearer token taxonomy but increases the burden on any entity handling digital securities — incentivizing vertically integrated infrastructure.
The pattern is consistent across jurisdictions: regulatory complexity favors entities that control their own technology stack from end to end.
Stripe's Tempo launched mainnet March 18, 2026 — a Layer 1 blockchain targeting 100,000+ TPS for stablecoin payments. Stripe processed $1.9T in 2025 payment volume. Partners include Mastercard, Visa, Deutsche Bank, and Standard Chartered.
Robinhood Chain logged 4 million testnet transactions in its first week (launched February 10, 2026). Built on Arbitrum Orbit, it supports nearly 2,000 tokenized stocks and ETFs. Mainnet planned for later in 2026.
Toss disclosed its blockchain strategy on March 12, 2026 at the Seoul Blockchain Meetup. The $10B+ fintech, with 30 million users and $1.8B in 2025 revenue, is evaluating L1 versus L2 architecture pending Korean digital assets legislation.
Revolut settled $1.2 billion on Polygon for under $700 in fees — demonstrating production-scale cost efficiency without building proprietary infrastructure.
PayPal expanded PYUSD to 70 markets on March 17, 2026, with market capitalization reaching approximately $4.1 billion, quintupling in one year.
The trend favors vertical integration. Regulatory complexity, compliance requirements, and the desire to control fee economics are driving fintechs to build or customize their own settlement layers rather than rely on general-purpose public chains.
The fintech-to-blockchain pipeline represents a structural shift in how payment infrastructure may evolve. The companies entering this space — Stripe at $159 billion valuation, Revolut at potentially $100 billion, Toss at $10-15 billion, Robinhood at $36 billion market cap — bring existing user bases, regulatory licenses, and transaction volumes that crypto-native projects spent a decade trying to achieve.
The economic question is not whether blockchain technology is useful for payments. That debate is settled by the fact that regulated, publicly traded financial companies are spending significant engineering resources to build on it. The question is whether this activity accrues to existing public blockchain ecosystems — Ethereum, Solana, Polygon — or to proprietary chains controlled by the fintechs themselves.
The data so far suggests the answer is both, but with a clear directional trend toward greater fintech control over the settlement layer. Stripe built an entirely new Layer 1. Robinhood built a customized Layer 2 with restricted access. Revolut chose an existing chain but concentrates its volume on a single network. Each step represents a different degree of vertical integration, but the direction is consistent: fintechs are moving to own their blockchain infrastructure, not rent it.
For existing Layer 1 and Layer 2 ecosystems, the implication is a potential bifurcation. Permissionless DeFi activity may remain on general-purpose chains. High-value, regulated payment flows may increasingly route through fintech-controlled infrastructure. The economic value distribution of blockchain networks — the core question of who captures fees, who controls settlement, and who sets the rules — is being rewritten by entities that were not part of the original crypto ecosystem.