Blockchain Infrastructure for Fintechs

TL;DR: Fintechs and payment companies are deploying dedicated blockchain infrastructure to reduce settlement costs, capture transaction revenue, and bring compliance controls in-house. This page covers what fintech blockchain infrastructure is, what the economics look like, and how regulated entities have handled compliance.

Most payment infrastructure is designed to monetize the movement of money itself. Every transaction passes through card networks, processors, and correspondent banks, each taking a share. Scale doesn't fix this. As transaction volume grows, so does the cost of participation.

The companies building customer-facing products don't own these economics. The infrastructure does.

Blockchain infrastructure changes that equation.

Instead of paying intermediaries at every step, fintechs can settle transactions on shared infrastructure with lower costs, faster settlement, and greater control over the economics. More value stays with the business building the product.

The Hidden Costs of Traditional Payment Infrastructure

Traditional payment rails extract value at every layer without giving fintechs a stake in the infrastructure. Settlement takes one to three business days, and fees scale directly with volume. And fintechs processing on existing networks never capture the transaction revenue they generate; it flows to whoever owns the rails.

Traditional payment rails have three structural problems for fintechs.

How Blockchain Infrastructure Reshapes Payment Economics

Dedicated blockchain infrastructure gives a fintech ownership of the transaction layer. Settlement happens in seconds; processing fees drop to a fraction of a cent. The revenue that would otherwise flow to a card network or payment processor stays with the company that built the product.

The infrastructure runs on Ethereum as its security layer, which means it inherits the same settlement guarantees as the global financial system's fastest-growing settlement rail. Assets posted to the infrastructure are secured by Ethereum's validator network, not by any single operator's solvency.

How Do Regulated Fintechs Handle Compliance?

Compliance controls operate at the transaction processing layer, not as post-processing audits. Screening, sanctions checks, and allowlists are enforced before transactions are accepted, preventing non-compliant activity from entering the system.

For regulated fintechs, compliance is often the first question: how do you deploy blockchain infrastructure within financial regulations? The answer is protocol-level controls. Compliance policies can be integrated directly into the sequencer, enabling sanctions screening, transaction filtering, and allowlists before execution.

Through OP Enterprise, regulated institutions can deploy managed infrastructure with built-in compliance tooling, including protocol-level screening, audit logging, and security monitoring. Bitpanda has deployed this model in production for a regulated EU exchange chain operating under European financial regulations.

What Does the Revenue Model Look Like?

Fintechs that own their infrastructure capture sequencer revenue: the spread between transaction fees users pay and what it costs to settle those transactions. A top-3 US exchange captured $75 million in sequencer revenue in H2 2025. The underlying infrastructure carries no licensing fees; it's MIT-licensed open source.

The economics of ownership look different from the economics of tenancy.

On traditional rails, transaction revenue flows to the network. On dedicated blockchain infrastructure, the operator captures sequencer revenue: the difference between transaction fees paid by users and the cost to process and settle those transactions to Ethereum.

What Does Deployment Look Like for a Fintech?

Self-operated deployment is available and fully documented, but most regulated entities prefer a managed offering with SLA-backed uptime, security monitoring, and a direct relationship with the engineering team.

OP Enterprise is Optimism's managed infrastructure offering. It covers platform operations, security patching, compliance tooling, and access to a partner network that includes stablecoin issuers, oracle providers, bridges, block explorers, and wallet infrastructure.

Timeline from decision to production is 6 to 8 weeks.

Which Fintechs Are Already Running on This Infrastructure?

ether.fi built its neobanking product on OP Stack infrastructure: 70,000 active cards, 300,000 accounts, $160 million in TVL, $2 million in daily payment volume.

Bitpanda launched Vision Chain on OP Enterprise infrastructure, an EU-regulated exchange chain with OFAC screening built into the sequencer at the protocol level.

Kraken launched Ink on OP Enterprise for its exchange user base. The infrastructure handles exchange-grade transaction throughput under financial services compliance requirements.

OKX migrated its exchange infrastructure to OP Stack running on OP Enterprise.

Glossary

OP Stack - The open-source blockchain infrastructure framework developed by Optimism. MIT-licensed with no licensing fees. Used in production by ether.fi, Bitpanda, Kraken, OKX, and more than 50 other chains.

OP Enterprise - Optimism's managed infrastructure offering. Covers platform operations, security monitoring, compliance tooling, and access to a pre-integrated partner network including stablecoin issuers, oracles, bridges, and wallet infrastructure.

Sequencer - The component that orders and processes transactions on OP Stack infrastructure. Can be configured with compliance controls - OFAC screening, transaction allowlists - that run before a transaction is accepted.

Sequencer revenue - The spread between transaction fees users pay and the cost to settle those transactions to the Ethereum base layer.

Ethereum settlement layer - The base network that provides final settlement guarantees for transactions processed on OP Stack infrastructure. User assets remain withdrawable through Ethereum regardless of sequencer status.

Frequently Asked Questions

Is this the same infrastructure that crypto exchanges use, or is it built for regulated financial companies?

Both. The same infrastructure layer runs Kraken Ink (a regulated exchange), Bitpanda Vision Chain (a regulated EU exchange under financial law), and ether.fi (a consumer payment product). Compliance configuration varies by deployment.

How does compliance work in practice?

Transaction screening, OFAC checks, and allowlists run at the sequencer layer, before a transaction is processed, not as a post-processing audit. Non-compliant transactions never enter the system.

How long does it take to deploy?

6 to 8 weeks from decision to production with OP Enterprise managed infrastructure. The engineering work itself runs approximately 4 to 6 weeks. The time constraint is typically partner integrations: stablecoin issuer agreements, bridge configuration, and compliance review. OP Enterprise's partner network compresses these timelines.

What stablecoins can run on my infrastructure?

USDC via Circle's CCTP is the standard path and is pre-integrated in the OP Enterprise partner network. Additional stablecoins and digital assets are configurable based on issuer agreements. The OP Enterprise team has relationships with major stablecoin issuers that shorten integration timelines compared to independent negotiation.