- Optimists argue that fintechs can use blockchain infrastructure to settle payments in seconds, reduce processing fees, and maintain the transaction economics that traditional rails capture.
- Compliance can be performed at the sequencer layer through sanctions screening, allow lists, and filtering before a transaction is accepted.
- OP Enterprise offers managed deployment with audit logging, monitoring, and partner integration. Examples include Bitpanda, Kraken Ink, OKX, and ether.fi, which reports 70,000 active cards and $2 million in daily volume.
Optimism argues that fintechs are no longer just experimenting with blockchain. They are using purpose-built infrastructure to take back control of payments, revenue, and compliance from traditional payment rails. In its latest industry briefing, the project argued that in traditional payment networks, fintech companies continue to pay intermediaries every step of the way, even as transaction volumes grow. Settlement can take 1 to 3 business days, but if your annual trading volume is $1 billion, the fees could be $15 million to $30 million. At the core is ownership of the transactional layernot a crypto brand.
Dedicated blockchain infrastructure changes that equation by allowing fintechs to settle transactions in seconds, reduce processing fees to cents, and keep revenue that would otherwise flow to card networks and processors. Optimism frames Ethereum as a security layer beneath that model, with assets protected by Ethereum validators rather than the solvency of a single operator. It’s important because Settlement management becomes an economic strategywhere fintechs are no longer tenants on rails owned by others.
Compliance becomes part of the transaction layer
The compliance discussion is equally important, but perhaps even more surprising for regulated finance. Optimists say screening, sanctions checks, and whitelisting can operate at the sequencer layer before a transaction is accepted, rather than appearing later as post-processing audits. The company’s managed infrastructure product, OP Enterprise, includes protocol-level screening, audit logging, security monitoring, and platform operations. Bitpanda is deploying this model on its EU-regulated exchange chain, and Kraken’s Ink and OKX use OP Enterprise infrastructure. A key compliance claim is prevention before executionnot the cleanup after the risk enters the system.
Economics makes the model more pointed. Fintechs that own the infrastructure can capture sequencer revenue, the spread between user transaction fees and Ethereum settlement costs. Optimism says the top three exchanges in the US will earn $75 million in sequencer revenue in the second half of 2025, and the OP stack itself is licensed by MIT, meaning there are no licensing fees. Implementation with OP Enterprise can take 6-8 weeks and includes access to partners such as stablecoin issuers, oracles, bridges, block explorers, and wallets. The broader message is that blockchain infrastructure is becoming the operational infrastructure for fintech.it’s not just a speculative add-on. For regulated builders, blockchain moves from an optional channel to a balance sheet and compliance instrument, with direct operational responsibility for large-scale customer flows.
