In 2020, Revolut listed cryptocurrency trading as a feature alongside currency exchange and budgeting tools. By 2024, blockchain was embedded in the company’s payment routing, with stablecoin settlements handling a portion of cross-border transfers. The shift from “we also do crypto” to “blockchain runs our payments” mirrors what is happening across the fintech industry. Blockchain is no longer a product category. It is becoming part of the core technology stack. The global blockchain market is projected to grow from $31.18 billion in 2025 to $577.36 billion by 2034, according to Fortune Business Insights, at a 36.50% compound annual growth rate.
From Feature to Foundation
The first wave of fintech blockchain adoption treated the technology as a customer-facing product. Companies like Coinbase, Kraken, and Robinhood offered cryptocurrency trading alongside traditional brokerage services. The blockchain was visible to the user: they bought tokens, held them in wallets, and tracked prices.
The second wave, which accelerated between 2022 and 2024, uses blockchain as backend infrastructure that the user never sees. Stripe’s acquisition of Bridge for $1.1 billion in October 2024 is the clearest signal. Bridge provides stablecoin payment infrastructure that companies embed into their existing products. A business using Stripe to process payments in emerging markets may settle transactions in USDC on a blockchain without the end customer ever knowing.
This pattern, blockchain as invisible infrastructure, is what makes it a core technology rather than a feature. When a fintech company uses blockchain for settlement, the user experience does not change. The payment still looks like a payment. But the settlement is faster, the fees are lower, and the reconciliation is automatic.
Blockchain-as-a-Service platforms account for 51.72% of blockchain market revenue, according to Fortune Business Insights. That percentage reflects how many companies are deploying blockchain through managed services rather than building proprietary networks. IBM, Amazon Web Services, Microsoft Azure, and R3 all offer BaaS products that let fintech companies add blockchain capabilities to their stack in weeks rather than years.
The Technical Case for Blockchain in Fintech
Fintech companies are adopting blockchain for specific technical advantages that their existing infrastructure cannot match.
Settlement finality is the first. In traditional payment systems, a transaction is not truly settled until funds move between bank accounts, which can take one to three business days. During that window, the transaction can be reversed, disputed, or delayed. Blockchain-based settlement is final within seconds or minutes. Once a transaction is confirmed on a blockchain, it cannot be reversed without the consent of the receiving party. For fintech companies handling high-volume payments, this eliminates a significant source of operational risk.
Programmable money is the second. Smart contracts allow fintech companies to build financial logic directly into transactions. An escrow payment can release funds automatically when a shipment tracking number shows delivery. A subscription billing system can adjust pricing based on usage data fed into a smart contract. A lending protocol can liquidate collateral automatically when a loan-to-value ratio exceeds a threshold. None of these require human intervention or separate workflow automation tools.
Interoperability is the third, though it remains a work in progress. A fintech company running on Ethereum can interact with any other application on Ethereum through standardised interfaces (ERC-20 for tokens, ERC-721 for unique assets). This composability means that a lending protocol, a payment system, and an insurance product can interact programmatically without custom integrations. Traditional financial infrastructure requires point-to-point connections between each system, creating exponential complexity as the number of counterparties grows.
Where Fintech Companies Are Deploying Blockchain
The payments application segment accounts for 25.45% of blockchain market revenue, making it the largest single use case. Within payments, fintech companies are deploying blockchain in three specific areas.
Cross-border remittances are the most mature application. Blockchain-based cross-border payments now handle approximately $3 trillion per year, growing at 45% annually, according to Coinlaw. Companies like Wise, Remitly, and WorldRemit compete on speed and price. Blockchain-based settlement gives them an additional cost advantage: they can route payments through stablecoin rails at a fraction of the cost of correspondent banking.
B2B payments are a newer but rapidly growing application. Companies making cross-border vendor payments (a manufacturer in Ohio paying a supplier in Shenzhen, for example) face the same correspondent banking delays and fees as consumer remittances, but at much higher transaction values. Blockchain-based B2B payment platforms like Paystand and Circle’s business products settle these transactions in hours rather than days.
Payroll for distributed teams is a third area. Companies with employees or contractors in multiple countries use platforms like Deel, Remote, and Papaya Global for international payroll. Several of these platforms now offer stablecoin payroll options, allowing workers in countries with volatile currencies or limited banking access to receive dollar-denominated payments directly.
Engineering Implications
Treating blockchain as core technology changes how fintech companies structure their engineering teams. In the feature era, a single “crypto team” of three to five engineers could manage a trading product built on top of exchange APIs. When blockchain becomes infrastructure, the engineering requirements expand significantly.
Smart contract development requires specialised skills. Solidity (for Ethereum-based chains) and Rust (for Solana and Polkadot) are the primary languages. Smart contract bugs can result in immediate, irreversible financial losses, so audit processes are more rigorous than typical software review. A single smart contract audit costs between $50,000 and $500,000, depending on code complexity.
Node infrastructure must be maintained. A fintech company running its own blockchain nodes (rather than relying entirely on BaaS providers) needs infrastructure engineers who understand distributed systems, consensus mechanisms, and network security. Companies like Alchemy and Infura provide node-as-a-service, but fintech firms handling high-value transactions often run their own nodes for reliability and data sovereignty.
Compliance engineering becomes more complex. Blockchain transactions are permanent and pseudonymous, which creates challenges for privacy regulations like GDPR (which includes a “right to be forgotten” that conflicts with blockchain immutability). Fintech companies must build compliance layers that reconcile blockchain’s transparency with data protection requirements.
What Slows Adoption
Despite the technical advantages, several factors limit how quickly fintech companies can make blockchain a core technology.
Regulatory uncertainty remains the largest barrier. The European Union’s MiCA regulation provides clarity for companies operating in EU markets, but the United States still lacks comprehensive federal legislation. A fintech company that deploys blockchain-based settlement in the US must assess whether its tokens are securities (SEC jurisdiction), commodities (CFTC jurisdiction), or money transmission instruments (FinCEN and state regulators). The answer often depends on the specific token and use case, creating legal ambiguity that increases compliance costs.
Talent scarcity is a practical constraint. Blockchain engineering talent commands a premium. Senior Solidity developers in the US earned between $180,000 and $350,000 in 2024, according to multiple recruiter surveys. Fintech companies competing for this talent face bidding wars with crypto-native firms, DeFi protocols, and large banks building their own blockchain infrastructure teams.
Scalability limitations persist, though they are narrowing. Ethereum’s base layer processes 15 to 30 transactions per second. Layer-2 networks like Arbitrum and Optimism increase throughput to thousands of transactions per second. Solana processes over 4,000 transactions per second. These numbers are sufficient for most fintech applications, but they remain below the capacity of traditional payment networks like Visa (65,000 TPS theoretical capacity).
The fintech companies moving fastest on blockchain adoption share a common approach: they treat the technology as infrastructure, not as a selling point. The $577 billion market projection for 2034 will be realised not by companies building blockchain products for crypto enthusiasts, but by companies building financial products for everyone, with blockchain running underneath.
