Introduction
Fintech founders and product teams frequently underestimate patent risk at launch. The assumption — common in software-first companies — is that the financial services patent landscape is dominated by legacy institutions that rarely enforce against nimble technology companies, and that software-implemented financial methods are difficult to patent following the post-Alice validity challenges. Both assumptions are incomplete in the Open Banking era.
Open Banking has generated a significant and actively evolving patent landscape around payment initiation APIs, account information aggregation methods, consent management systems, and embedded finance infrastructure. That landscape is held by three distinct categories of patent owner with different enforcement behaviours. And the technical architecture mandated by the Open Banking standard — which every UK-regulated AISP, PISP, and CBPII must implement — creates a shared technical infrastructure with patent risk embedded in its implementation layers.
This article covers why fintech FTO is more complex than most software FTO, what the three patent holder categories look like in the Open Banking landscape, and what a complete payment API FTO needs to cover before a UK fintech product launches.
Why Fintech FTO Is More Complex Than Most Software FTO
Fintech FTO has all the methodological complexity of software FTO — method claims that cover processes rather than products, single-entity performance questions, induced infringement risk through platform architectures — plus two additional complications that are specific to the financial services context. As our guide on FTO for software products and method claim mapping covers, method claim FTO requires a different analytical framework from product feature mapping. In fintech, that method claim complexity is amplified by the financial services regulatory architecture and the standards-adjacent patent risk that comes with implementing Open Banking APIs.
Method claims dominate the landscape: The vast majority of commercially significant patents in the Open Banking and payment technology space are drafted as method claims — covering how payment initiation, data aggregation, consent management, or account information retrieval is performed. A fintech product does not ‘have’ these patented methods in the way a hardware product has physical features. It ‘performs’ them when executed. The claim mapping methodology for a fintech FTO must work at the execution step level, not the product feature level.
Three distinct patent holder categories: Unlike most technology sectors where FTO risk is concentrated among a relatively homogeneous set of competitor patent holders, the Open Banking patent landscape has three distinct categories of holders with very different enforcement behaviours. Understanding all three is essential for accurate FTO scope.
Standards-adjacent patent risk: Open Banking mandates a specific technical architecture — the FCA-regulated open banking standards, implemented through the Open Banking Implementation Entity (OBIE) framework and Financial-grade API (FAPI) specifications. Every regulated AISP, PISP, and CBPII implementing these standards is implementing the same technical architecture. Patents that read on the mandated implementation approach represent a risk that is spread across every participant in the Open Banking ecosystem, not just individual product choices.
The Three Patent Holder Categories in the Open Banking Landscape
A complete fintech FTO needs to assess blocking risk across all three patent holder categories. As our analysis of the difference between FTO and infringement analysis covers, FTO is concerned with whether your product performs steps covered by someone else’s claims — not with who those holders are or how likely they are to enforce. But understanding the enforcement behaviour of each holder category is essential for calibrating the commercial risk associated with each blocking patent found.
Category 1: Traditional Financial Institutions Major UK and global banks — Barclays, HSBC, Lloyds, NatWest, and their international equivalents — hold significant patent portfolios covering payment processing methods, account information systems, authentication protocols, and fraud detection algorithms. These patents were filed to protect internal systems before Open Banking mandated open API architectures, but many of their claims read on the implementation patterns that Open Banking-compliant products use. Traditional FIs have historically been selective about fintech enforcement but have become more active as fintech competition has grown.
Category 2: Fintech-Native Companies Established fintech companies — particularly those that built early market positions in payment processing (Stripe, Adyen, Worldpay), account aggregation (Plaid, Yodlee, TrueLayer), and embedded finance (Railsbank/Railsr, Modulr) — hold growing patent portfolios protecting their API architectures, data normalisation methods, and integration frameworks. These companies are more likely than traditional FIs to enforce against direct competitors entering their market space, and their patents are more precisely targeted at the specific technical implementations that Open Banking products use.
Category 3: Non-Practising Entities A third category that fintech teams frequently overlook: NPEs that have accumulated patent portfolios in payment processing technology, data aggregation methods, and financial API protocols. These entities do not build products — they hold patents and enforce them for licensing revenue. NPE activity in fintech has increased as the commercial value of Open Banking implementations has grown. NPE patents are frequently broader and older than the specific Open Banking architecture, but their claims may read on core implementation patterns in ways that create licensing demand.
What to Cover in a Payment API FTO
A complete payment API FTO for a UK fintech product needs to cover four specific technology categories, each with distinct patent claim types and enforcement risk profiles.
- Payment initiation method claims. Patents covering the sequence of steps involved in initiating a payment through an open API — the request-response cycle between the PISP, the ASPSP, and the payment scheme. These are the highest-density category in the Open Banking patent landscape and the one where both traditional FI portfolios and fintech-native company portfolios have the most active positions. The claim mapping analysis for payment initiation needs to work at the API call sequence level, covering each step in the payment initiation flow against the method claim elements in each blocking patent.
- Data aggregation and account information method claims. Patents covering how account information is requested, retrieved, normalised, and presented to end users or downstream applications. This category is where the fintech-native aggregation companies (Plaid, Yodlee, TrueLayer) have the most concentrated portfolios. For AISPs and data aggregation platforms, this is typically the highest-risk category from a fintech-native company enforcement perspective.
- Authentication and consent management patents. Patents covering Strong Customer Authentication (SCA) implementations, OAuth 2.0 consent flow architectures, and the technical protocols governing how end-user consent to data sharing is obtained and managed. These patents frequently involve method claims where the user performs some steps (the consent interaction) and the system performs others — raising the single-entity performance doctrine questions that are central to fintech software FTO analysis.
- Embedded finance and BaaS infrastructure patents. A growing category covering the technical architecture of Banking-as-a-Service platforms — how banking capabilities are packaged as APIs and integrated into non-financial products. This is the fastest-growing filing category in the Open Banking adjacent patent space, and the one where NPE accumulation has been most active. For companies building embedded finance products, this category should be included in the FTO scope even if it is not the primary product feature set.
The Open Banking Standard and Its FTO Implications
Standards-adjacent patent risk: Implementing the UK Open Banking standard does not provide immunity from patent risk. Unlike standards-essential patents (SEPs) in wireless communication, where FRAND licensing obligations apply to patents declared essential to the standard, the Open Banking implementation framework does not have an equivalent SEP declaration and FRAND licensing mechanism. A patent that reads on a mandated implementation step in the OBIE framework is not automatically available under FRAND terms just because implementing the step is required for regulatory compliance.
FAPI and the UK OBIE standards: The UK Open Banking Implementation Entity’s API specifications and the Financial-grade API (FAPI) security profile mandate specific technical implementation patterns for payment initiation and account information services. Patents that read on these mandated patterns — such as specific OAuth 2.0 flow implementations, particular request-response structures, or defined data normalisation approaches — represent a risk for every regulated entity implementing the standard, not just individual product design choices.
How to assess whether a patent reads on standard-compliant implementation: For each potentially blocking patent identified in the FTO, the claim mapping analysis should assess not just whether your specific implementation performs the claimed steps, but whether the claim reads on the mandated implementation pattern itself. If a claim reads on the OBIE-mandated implementation, and your product is implementing the standard as required, the FTO assessment needs to flag this as a structural risk that may require a regulatory-context non-infringement argument, a licensing discussion, or a validity challenge against the blocking patent.
“The most underestimated fintech FTO risk is not from the obvious competitor who has built the same product. It is from the patent that reads on the technical architecture mandated by the Open Banking standard — because every participant implementing the standard is performing the same steps. A claim that reads on a mandated implementation is a risk that scales with the entire Open Banking ecosystem, not just with your product.”
How Our FTO Service Covers Fintech and Open Banking Products
Our freedom to operate service covers fintech and Open Banking FTO across all three patent holder categories — traditional financial institution portfolios, fintech-native company patents, and NPE accumulations in payment processing and data aggregation technology — with method claim mapping at the API call sequence level for payment initiation, data aggregation, authentication, and embedded finance infrastructure. For UK-regulated AISPs, PISPs, and embedded finance platforms, we structure FTO analyses to specifically assess whether any blocking patents read on the OBIE-mandated technical architecture rather than treating standards-compliant implementation as automatically cleared. The output gives product teams and their counsel a complete blocking patent picture across all three holder categories, with enforcement behaviour context for each category and a standards-adjacency assessment for any patent that reads on mandated implementation patterns.
Launching an Open Banking or embedded finance product in the UK? The patent landscape combines traditional FI portfolios, fintech-native company patents, and NPE accumulation. Our FTO service covers all three categories with method claim mapping at the API sequence level. → Contact Us
Conclusion: The Takeaway
Open Banking has created a fintech patent landscape that is more complex than most software FTO teams expect. The three-category holder structure — traditional financial institutions, fintech-native companies, and NPEs — requires a broader FTO scope than a standard software product FTO. The method claim dominance requires a different analytical methodology from product feature mapping. And the standards-adjacent risk from patents that read on OBIE-mandated technical architecture is a structural risk that standard-compliant implementation does not automatically resolve.
The fintech FTO that covers all three dimensions — all three holder categories, method claim mapping at the API sequence level, and standards-adjacency assessment — gives product teams a launch picture that reflects the actual patent risk in the Open Banking ecosystem. The one that treats fintech as a low-patent-risk sector misses all three dimensions — and leaves product teams exposed to blocking risk that a properly scoped FTO would have identified before launch.
