Five of the world's largest fintech companies — Stripe, Robinhood, Toss, Klarna, and Revolut — are now building or operating proprietary blockchain infrastructure. Stripe's Tempo mainnet went live March 18, 2026. Robinhood Chain, an Arbitrum-based layer 2, processed 4 million testnet transactions...
"We ourselves were disappointed with crypto's payments utility for much of the past decade. None of these businesses are using crypto because it's crypto or for any speculative benefit. They're performing real-world financial activity." — Patrick Collison, CEO, Stripe
Five of the world's largest fintech companies — Stripe, Robinhood, Toss, Klarna, and Revolut — are now building or operating proprietary blockchain infrastructure. Stripe's Tempo mainnet went live March 18, 2026. Robinhood Chain, an Arbitrum-based layer 2, processed 4 million testnet transactions in its first week after a February launch. South Korea's Toss, valued at $10 billion ahead of a planned U.S. IPO, has filed 24 KRW stablecoin trademarks and is recruiting blockchain engineers. Klarna is testing KlarnaUSD on Tempo. Revolut crossed $1.2 billion in on-chain transactions on Polygon and entered the UK's FCA stablecoin sandbox.
Separately, PayPal's PYUSD has reached $4.1 billion in market capitalization and expanded to 70 markets. Combined, these six companies serve more than 400 million users and processed over $3.5 trillion in payment volume in 2025.
The pattern is clear: payments companies are no longer integrating with existing chains as downstream consumers of infrastructure. They are becoming the infrastructure. The implications for existing layer 1 and layer 2 protocols, for crypto-native stablecoin issuers, and for the broader competitive landscape are substantial.
Stripe, valued at $159 billion following a February 2026 tender offer, launched the Tempo mainnet on March 18, 2026. The chain was developed in partnership with Paradigm and uses Simplex BFT consensus, claiming deterministic finality in approximately 500 milliseconds.
Tempo's design partners include Deutsche Bank, Visa, Mastercard, UBS, Standard Chartered, Shopify, OpenAI, Anthropic, DoorDash, and Kalshi. Gas fees are paid directly in USD stablecoins rather than a native token — a design choice that eliminates the friction of acquiring a separate gas asset for payments use cases. Collison described Tempo as "the payments-oriented L1, optimized for real-world financial-services applications," and compared it to a "decentralized, internet-scale SWIFT."
Stripe processed $1.9 trillion in total payment volume in 2025, up 34% year-over-year, and reported approximately $19.4 billion in gross revenue. Its stablecoin payments volume doubled to around $400 billion in 2025, with an estimated 60% representing B2B transactions. The company now powers 90% of the Dow Jones Industrial Average and 80% of the Nasdaq 100.
The Tempo mainnet launch included a Machine Payments Protocol (MPP), co-developed with Stripe, that enables autonomous software agents to execute payments without human intervention. Dune Analytics integrated Tempo data on April 3, 2026, providing the first public queryable dataset for on-chain transaction flows, stablecoin transfers, and DEX activity on the network.
Tempo raised $500 million in a Series A at a $5 billion valuation, according to The Block. Klarna, the Swedish buy-now-pay-later company, is the first bank to issue a stablecoin on Tempo. KlarnaUSD is being issued through Bridge, Stripe's stablecoin infrastructure platform, and is currently in testnet. Mainnet deployment is expected later in 2026.
Robinhood launched the public testnet for Robinhood Chain on February 10, 2026, at the Consensus conference in Hong Kong. Built on Arbitrum (an Ethereum layer 2), the chain processed 4 million transactions in its first week of testing.
Robinhood Chain is designed specifically around tokenized equities and regulated financial products, not general-purpose DeFi. Stock-style tokens are already available on the testnet, allowing development teams to test trading logic, liquidity models, and compliance controls with synthetic instruments. A full mainnet launch is expected later in 2026, though no date has been confirmed.
The decision to build on Arbitrum rather than launching an independent layer 1 reflects a different strategic calculation than Stripe's approach. Robinhood inherits Ethereum's security guarantees and existing liquidity infrastructure while gaining the ability to customize execution rules for securities settlement. This is a compliance-first architecture — chains designed around jurisdictional requirements rather than raw throughput.
Toss, operated by Viva Republica, serves approximately 30 million registered users — nearly 60% of South Korea's population. The company generated $1.8 billion in revenue in 2025, up 38% year-over-year. Operating profit surged 270% to $251 million. Net profit jumped 847% to $151 million. Toss is targeting a U.S. IPO in 2026 at a valuation above $10 billion.
A Stablecoin Task Force led by Chief Business Officer Kyuha Kim filed 24 KRW stablecoin trademarks in June 2025, including "TOSSKRW." The company has been recruiting blockchain engineers since February 2026, posting roles covering wallet systems, API and transaction processing, node operations, cryptographic signing, and financial compliance.
Toss has not decided whether to build a full layer 1 from scratch or deploy a layer 2 on an existing chain. According to internal sources cited by Blockmedia, the decision is contingent on the progress of South Korea's Digital Asset Basic Law, which would establish rules for digital asset issuance, stablecoin requirements, and crypto ETFs. No launch date or technical specifications have been confirmed.
The Toss case illustrates a regulatory dependency that crypto-native protocols do not face. A company with 30 million users in a single jurisdiction cannot launch a token without regulatory clarity — or risk its banking licenses, exchange partnerships, and planned IPO. The blockchain strategy is subordinate to the corporate strategy.
Klarna. The Swedish BNPL giant launched KlarnaUSD on Tempo's testnet, making it the first bank-issued stablecoin on the Stripe-Paradigm chain. Cross-border payments generate an estimated $120 billion in annual transaction fees, according to McKinsey, and Klarna views stablecoin rails as a path to compress those costs for its merchant and consumer base. McKinsey further estimates that stablecoin transactions now exceed $27 trillion annually.
PayPal. PYUSD has reached $4.1 billion in market capitalization, up more than five-fold over the past year. PayPal expanded PYUSD to 70 markets in March 2026. The token's 24-hour trading volume has ranged between $50 million and $63 million in recent weeks. PYUSD is now the seventh-largest stablecoin by market capitalization. Unlike the others, PayPal has not built its own chain; PYUSD operates on Ethereum and Solana. But the issuance of a proprietary stablecoin at this scale is, functionally, a claim on the payments layer.
Revolut. Europe's most valuable private fintech ($9 billion projected 2026 revenue, 68.3 million customers) crossed $1.2 billion in on-chain transactions on Polygon. The company has integrated zero-fee remittances on Polygon, POL staking at up to 4% APY, and crypto-funded card transactions. In April 2026, the UK's Financial Conduct Authority selected Revolut for its regulatory sandbox to pilot a pound-denominated stablecoin pegged 1:1 to sterling.
The aggregate numbers put this trend in context:
| Company | Users (M) | 2025 Volume | Blockchain Strategy | Status | |---------|-----------|-------------|-------------------|--------| | Stripe | Powers 90% of DJIA | $1.9T | Tempo (own L1) | Mainnet live (Mar 2026) | | PayPal | 400M+ | $1.53T (2024) | PYUSD on ETH/SOL | $4.1B market cap | | Robinhood | 24M+ | N/A | Robinhood Chain (Arbitrum L2) | Testnet (Feb 2026) | | Toss | 30M | $1.8B revenue | L1 or L2 (TBD) | Planning phase | | Revolut | 68.3M | $1.7T txn volume | Polygon integration + GBP stablecoin | FCA sandbox | | Klarna | 85M+ | N/A | KlarnaUSD on Tempo | Testnet |
These are not crypto-native startups. They are regulated financial institutions with existing payment licenses, banking charters, or equivalent authorizations in multiple jurisdictions. Stripe processes payments for most of the S&P 500. PayPal has over 400 million accounts. Toss operates banking, securities, and insurance subsidiaries in South Korea.
The total user base across these six companies exceeds 600 million accounts, though overlap exists. Their combined payment processing volume exceeds $5 trillion annually.
The entry of fintechs into chain operation creates a structural challenge for existing layer 1 and layer 2 protocols that depend on payments-related activity for fee revenue and network utilization.
Distribution advantage. Stripe's Tempo launches with design partners that include four of the world's 20 largest banks by assets (Deutsche Bank, UBS, Standard Chartered, and partners accessible via Visa/Mastercard). No crypto-native chain has comparable institutional distribution on day one.
Stablecoin issuance capture. When Klarna issues KlarnaUSD on Tempo rather than on Ethereum or Solana, the stablecoin supply and associated economic activity accrue to Tempo's network. At $318.6 billion in total stablecoin market cap as of April 11, 2026, the question of which chains capture future stablecoin issuance has direct TVL implications.
Regulatory moat. Fintech chains operate inside existing regulatory frameworks. Stripe holds money transmission licenses. Klarna is a bank. Revolut has a UK banking license. This creates a compliance surface that crypto-native chains cannot easily replicate — but it also means fintech chains will likely be more restrictive in what they permit on-chain.
Fee compression. Tempo charges gas in stablecoins, not in a volatile native token. For commercial payments, this eliminates token price risk from transaction costs. If fintech chains set fees at or near cost (as loss leaders for their core payment businesses), this puts downward pressure on fee revenue across the broader chain ecosystem.
The counterargument: crypto-native chains offer permissionless composability, programmability, and access to existing DeFi liquidity that fintech chains may not replicate. A Tempo user cannot, today, collateralize KlarnaUSD in an Aave pool or swap it through Uniswap. Whether that matters depends on whether the target user cares about DeFi composability at all — and for the vast majority of Stripe's merchant base, the answer is likely no.
The fintech-to-chain pipeline represents a different competitive dynamic than the traditional narrative of "institutional adoption" — where banks and corporates adopt existing crypto infrastructure. In this model, institutions build their own infrastructure and bring their existing user bases onto it.
The Federal Reserve's April 8, 2026 report on stablecoin financial stability implications noted that stablecoins "strengthen interconnections between the traditional financial system and the digital assets ecosystem." The fintech chain builders are the mechanism through which those interconnections are forming — not as abstract risk vectors, but as specific, named companies with specific, measurable transaction flows.
For crypto-native protocols, the question is not whether institutional capital enters the ecosystem. It already has. The question is whether that capital builds on existing chains or builds new ones. In Q1 2026, the data shows the largest fintechs are choosing to build.