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.

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

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.

OP Stack by the numbers

Current figures are published on optimism.io/stats.

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. OP Stack chains had $22.2B in total value secured as of September 2026 (L2BEAT).

What Do Stablecoin Transfers Actually Cost Per Chain?

End-User Stablecoin Transfer Fees

The figures below are Circle's published per-chain gas fees for USDC transfers through Circle Gateway, as listed on Circle's Gateway fees page, accessed October 23, 2026. Circle additionally applies a 0.005% transfer fee on cross-chain Gateway transfers, listed on the same page. These figures apply specifically to USDC flows through Circle's Gateway; fees for arbitrary wallet-to-wallet ERC-20 transfers outside Circle's flow may differ.

At these published rates, an OP Mainnet USDC transfer costs roughly 1/650th of the same transfer on Ethereum L1. For a payments product processing millions of transfers, that delta is the difference between fees as a rounding error and fees as a line item.

For institutional readers evaluating chains for daily operations, the lesson from broader industry analysis applies here: predictable fees matter as much as low fees. A network that spikes during congestion poses more operational risk than one with stable baseline costs. OP Stack chains publish data to Ethereum via blob transactions, which has produced comparatively tight fee distributions relative to congestion-prone base layers.

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, institutions can deploy managed infrastructure with built-in compliance tooling, including protocol-level screening, audit logging, and security monitoring. Sanctions screening is enforced at the sequencer using the operator's own compliance provider, so sanctioned addresses are rejected before a transaction reaches a block. The operator owns its compliance.

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. 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.

That spread grows with volume.

Not every fintech will reach the same scale. But the model is the same: transaction volume generates revenue that belongs to the infrastructure operator, not to a third-party network. For fintechs that process significant volume, the economics of ownership versus tenancy become a board-level conversation once someone puts the numbers on paper.

The underlying framework is MIT-licensed. Ongoing costs are the computing infrastructure to run the platform and the Ethereum settlement fees, which scale with volume and are a fraction of interchange or processing fees at equivalent volumes.

Talk to the OP Enterprise team about your infrastructure

What Does Deployment Look Like for a Fintech?

Most regulated fintechs deploy through a managed infrastructure offering with SLA-backed uptime, compliance tooling, and a direct engineering relationship. Timeline from decision to production is 6 to 8 weeks. The bottleneck is typically partner integrations (stablecoin agreements, bridge configuration), not the engineering build itself.

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 (Circle USDC), oracle providers, bridges, block explorers, and wallet infrastructure.

Timeline from decision to production is 6 to 8 weeks. The constraint is rarely technical. It's partner integrations: getting a stablecoin issuer agreement in place, configuring bridge infrastructure, and completing the compliance review. OP Enterprise's partner relationships compress timelines that would otherwise take three to six months of independent negotiation.

Kraken's Ink, OKX's exchange infrastructure and Bitpanda's Vision Chain are built on the OP Stack through OP Enterprise. For regulated entities specifically, the compliance tooling and direct engineering relationship are what make the timeline possible.

Which Fintechs Are Already Running on This Infrastructure?

ether.fi, Bitpanda, Kraken, and OKX all run production systems on the OP Stack. Deployments span a consumer card program, an exchange chain in the EU, and exchange settlement infrastructure. The compliance questions those teams resolved are the same ones a new fintech deployer will face.

ether.fi built its neobanking product, ether.fi Cash, on OP Mainnet. It moved $220M in TVL from Scroll to OP Mainnet in April 2026 (Optimism). As of August 13, 2026: "More than 100,000 people carry an active ether.fi Cash card. Over 300,000 accounts use it." (Optimism)

Bitpanda launched Vision Chain on the OP Stack through OP Enterprise. Bitpanda's chain ships with EURC, a euro stablecoin.

Kraken launched Ink on the OP Stack through OP Enterprise for its exchange user base. Ink handles exchange-grade transaction throughput.

OKX migrated its exchange infrastructure to the OP Stack through OP Enterprise.

Talk to the OP Enterprise team about your infrastructure

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 others among the 54 mainnet chains deployed on the OP Stack as of October 2026.

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. On dedicated infrastructure, this revenue belongs to the infrastructure operator, not a third-party network.

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.

Talk to the OP Enterprise team about your infrastructure

See also: What Is the OP Stack? · How to Launch an Ethereum Layer 2 · Best Infrastructure Frameworks for Launching an Ethereum Layer 2 · Payments on Ethereum Layer 2s