The Partner Blueprint: The Correspondent Banking Partners in UK & European Fintechs
- Adellet Sarkis
- May 4
- 11 min read
Updated: May 10
A Genesis Guide to Payment Network Access, Virtual IBANs & the Providers Worth Knowing
If you are building a fintech in 2026, your choice of banking partner is your infrastructure. It determines how fast you can move money, what currencies you can touch, whether your clients get their own IBANs, and frankly, how competitive your product actually is. Yet too many founders treat it as an afterthought, picking whoever responds fastest to a cold email.
This guide cuts through the noise. We have broken down the correspondent banking and payment access landscape across the UK and Europe, separating the legacy gatekeepers from the new infrastructure layer being built specifically for businesses like yours.
Why This Decision Matters More Than Ever
Correspondent banking is the invisible plumbing behind cross-border payments. When your customer sends money from London to Madrid, chances are it passes through at least one correspondent bank acting as an intermediary. For fintechs, the question isn't just who that intermediary is, it's whether you can get direct access to payment rails yourself, issue virtual IBANs to your own clients, and plug into the network via a clean API rather than a fax machine and a relationship manager in a suit.
The industry is splitting into two camps:
Legacy Correspondents — established banks that have offered these services for decades, with deep networks but slow tech, high minimum volumes, and lengthy onboarding
Neo-infrastructure Providers — a new generation of regulated banks and payment institutions built API-first, designed to serve fintechs, and actively competing to be your banking backbone
Both have a place. Knowing which one you need, and when, is the point of this piece.
Category 1: Neo-Infrastructure Providers (Fintech for Fintech)
These are the providers purpose-built for businesses like yours. They hold full banking or e-money licences, offer direct payment rail access, and have made virtual IBANs and API-first integration central to their model rather than a bolt-on.
ClearBank
Website: clear.bank
ClearBank is arguably the most prominent name in UK fintech-to-fintech banking right now, and its trajectory over the past two years backs that up. It reported its third consecutive year of profitability in FY2025, with group normalised revenue rising 34% year-on-year to £121.6m, while fee-based income grew 51% — now accounting for the majority of its revenues. That fee shift matters: ClearBank is no longer dependent on interest rates to survive.
Its real-time clearing and embedded banking infrastructure now underpins more than 17 million accounts, up from 13 million in 2024, with customer balances increasing 65% to £17.8bn and payment volumes jumping 57% to 262 million transactions.
On the product side, ClearBank offers virtual IBANs, real accounts, and direct clearing access in both the UK and Europe. Its European entity, ClearBank Europe NV, holds a Credit Institution Licence from the European Central Bank and provides euro accounts and payments, operating accounts, virtual accounts, and access to major European payment rails including SEPA Credit Transfer, SEPA Instant, and TARGET2.
The most forward-looking development is its partnership with Circle. ClearBank has signed a framework agreement to integrate MiCA-compliant stablecoins into its banking infrastructure and plans to join the Circle Payments Network, a blockchain settlement infrastructure enabling 24/7 cross-border settlement using USDC and EURC. For fintechs thinking about where the infrastructure of cross-border payments is heading, this is a signal worth paying attention to.
Best for: Fintechs and EMIs needing UK Faster Payments access, virtual IBANs, and a regulated banking partner that won't compete with your business.
Banking Circle
Website: bankingcircle.com
Banking Circle has quietly become one of the most important pieces of financial infrastructure in Europe that most end customers have never heard of. It operates as a full bank — not just an EMI — and its focus is unambiguously B2B: serving PSPs, EMIs, and fintechs with high-volume payment needs.
Banking Circle provides direct access to local payment schemes and local account infrastructure for five major currencies across Europe and the UK — EUR, GBP, DKK, SEK, and AUD — all via a single API integration, with more currencies in the pipeline. Its ambition, stated explicitly, is to become a "super-correspondent bank" for global B2B payments, removing the friction that currently slows down cross-border flows.
Its accounts product includes physical and virtual accounts in multiple currencies, across multiple jurisdictions. The recent addition of Swiss Franc (CHF) settlement and access to the Swiss Interbank Clearing system extended its reach further, with Liechtenstein-issued VIBAN accounts available for compliance-aligned CHF flows.
Best for: High-volume payment platforms, PSPs, and EMIs processing large cross-border transaction volumes across Europe. Strong for businesses that need safeguarding accounts, multi-currency IBANs, and direct scheme access under one roof.
Clear Junction
Website: clearjunction.com
Clear Junction occupies a distinctive niche in the correspondent banking landscape: it's a specialist in payment access and payments infrastructure for regulated financial institutions, with particular depth in serving clients that other providers often find difficult to onboard, including cross-border payment businesses, remittance firms, and more recently, regulated crypto asset providers.
Its correspondent accounts enable payment service providers to serve millions of their own customers through Clear Junction's technology and payments integration. At the heart of that offering is the ability to connect correspondent accounts to virtual IBANs, e-wallets, and payment rails across the UK and Europe, including SEPA, SEPA Instant, and Faster Payments.
What sets Clear Junction apart is its willingness to work with segments that the broader industry treats cautiously. In July 2025, it extended its named virtual IBAN services to VASP-licensed businesses — previously only available to banks and EMIs, giving regulated crypto firms direct access to fiat settlement capabilities and customer-level account referencing. The use cases unlocked include peer-to-peer transfers, fiat-to-crypto conversions, and automated treasury operations — capabilities that licensed digital asset businesses have historically struggled to access through mainstream banking providers.
For banks specifically, Clear Junction offers access to local clearing networks in the UK and mainland Europe via correspondent accounts and virtual bank account numbers, enabling efficient and cost-effective cross-border payments for institutions that connect via API.
Best for: Regulated payment institutions, remittance businesses, EMIs, and licensed VASPs needing reliable correspondent accounts, named virtual IBANs, and UK/EU payment rail access, particularly where other providers have declined to onboard.
Starling (Banking Services)
Website: starlingbank.com/banking-services
Starling is best known as a challenger bank, but its B2B arm — Starling Banking Services — offers fintechs and financial businesses indirect access to Starling's own payment infrastructure, without needing to build or license a full banking stack.
The proposition is straightforward: businesses can plug into Starling's payment rails via a fully API-native integration, gaining access to Faster Payments (FPS) in real time, with the reliability and compliance assurance of a fully licensed, regulated UK bank sitting behind it. Starling was the first UK bank to offer Faster Payment access through APIs, and the platform is cloud-native and built on RESTful APIs, meaning it can integrate into existing products or be used to build new ones from scratch.
Use cases served include investment platforms, merchant payments, inbound international payments, and treasury and payouts, pointing to a B2B client base that needs embedded payment capability rather than a banking licence of their own.
What sets this apart from pure BaaS providers is the bank-grade trust underpinning it: zero downtime, ongoing support, and the credibility of infrastructure that already runs one of the UK's most prominent digital banks. There's no legacy technology in the stack, which Starling positions as a key advantage over traditional correspondent banking arrangements.
For those that need more, a full SaaS banking platform to launch their own financial products, Starling signposts Engine by Starling as the next step up.
Best for: Fintechs, investment platforms, and businesses that need reliable, API-first access to Faster Payments and real-time payment infrastructure, backed by a regulated UK bank. Less suited to businesses seeking a full banking technology licence or BaaS stack.
Modulr
Website: modulrfinance.com
Modulr is the embedded payments infrastructure provider most commonly associated with payroll, lending, and accounting software integrations — but its correspondent banking capabilities are broader than that reputation suggests.
Modulr enables businesses to open accounts in GBP, EUR, USD, CZK, DKK, NOK, PLN, SEK, CHF, HKD, and JPY, with more currencies in development. On the inbound side, clients can receive SWIFT, SEPA Credit, and CHAPS payments into Modulr accounts, with CHAPS enabling same-day high-value settlement.
The platform is API-led throughout, with account opening and management available 24/7 via API or portal. It also offers Confirmation of Payee, Direct Debit collection, and Open Banking payment initiation, making it one of the more complete embedded payments stacks in the market.
Where Modulr differs from ClearBank and Banking Circle is focus: it's more oriented toward software platforms embedding payments into their products than toward pure correspondent banking relationships. That said, it's a serious player for fintechs that need multi-currency account infrastructure with strong UK payment scheme access.
Best for: Software platforms, payroll providers, lenders, and marketplaces embedding payments. Also relevant for fintechs needing multi-currency accounts with broad European rail access and a clean API.
OpenPayd
Website: openpayd.com
OpenPayd focuses on embedded finance and multi-currency account infrastructure — a natural fit for businesses that need to give their own clients named accounts with real IBANs rather than pooled structures.
In November 2025, OpenPayd expanded its European payments infrastructure with the addition of Netherlands-issued virtual IBANs, adding to its existing UK, French, and Maltese options, and bringing connectivity to Target2 for real-time euro settlement. That T2 connection matters: it links OpenPayd clients to a network of over 40,000 banks worldwide for high-value euro flows.
The company provides client-named IBANs, account segmentation, reconciliation features, and treasury management tools, with modular APIs that allow businesses to integrate financial operations directly into their products.
Best for: Platforms needing named virtual IBANs for their end clients, FX and treasury tools, and multi-currency infrastructure with expanding European rail access.
Equals Money / Railsr (Combined Entity)
Website: equalsmoney.com / railsr.com
This is one of the more interesting developments of 2025 in the embedded finance space. Equals Money and Railsr officially combined to form one of the largest embedded finance providers in Europe, bringing together Equals' leadership in multi-currency accounts, FX, and corporate cards with Railsr's embedded finance, Banking-as-a-Service, and Cards-as-a-Service infrastructure.
The merger gives the combined entity significantly more firepower to compete with Banking Circle and Modulr — targeting fintech companies, corporations, and consumer brands needing to operate financial services across multiple markets.
For fintech buyers, the pitch here is breadth: a single relationship covering embedded accounts, virtual IBANs, FX, card issuing, and BaaS infrastructure. Both brands continue to operate while integration proceeds behind the scenes.
Best for: Fintechs and brands that want a broad embedded finance stack, accounts, cards, FX, and BaaS, from a single provider.
Category 2: Legacy Correspondents
These are the traditional banks that have long dominated correspondent banking relationships. They bring unmatched global reach, deep regulatory credibility, and access to SWIFT's full correspondent network — but they are typically slower to onboard, more selective about clients, and less API-native than the neo-infrastructure providers. For fintechs at scale, they often remain essential for certain corridors, currencies, and institutional credibility.
NatWest
Website: natwestgroup.com
NatWest is one of the UK's four major clearing banks and remains a significant correspondent banking partner for financial institutions operating in the UK. It offers GBP clearing, CHAPS, and Faster Payments access for institutional clients, along with trade finance and treasury services for larger counterparties.
It's worth noting that NatWest returned to full private ownership in May 2025 after 17 years of partial government ownership — a milestone that signals increasing commercial agility. The bank also now operates a Boxed division offering BaaS capabilities to external businesses, placing it in an interesting transitional position between legacy and modern infrastructure. That said, for early-stage fintechs, NatWest's onboarding process and minimum thresholds remain prohibitive.
Best for: Established financial institutions needing GBP correspondent accounts, UK clearing access, and trade finance. The Boxed/BaaS arm is worth watching for mid-tier bank infrastructure needs.
Barclays
Website: barclays.com
Barclays operates one of the more fintech-aware correspondent banking desks among the legacy banks, partly by necessity — its investment banking and transaction banking arms are global, giving it broad multi-currency correspondent relationships across EUR, USD, GBP, and beyond.
For fintechs, Barclays Corporate and Investment Bank is the relevant entry point, offering cash management, SWIFT connectivity, and trade finance. It has been involved in a number of fintech partnership deals in recent years. However, direct banking relationships with early-stage fintechs remain selective, and the onboarding burden is significant.
Best for: Scale-ups and institutions needing global SWIFT connectivity, multi-currency cash management, and trade finance from an investment-grade counterparty.
JP Morgan
Website: jpmorgan.com/payments
JP Morgan is the largest correspondent bank in the world by USD clearing volume, and its Payments business, particularly Kinexys (formerly Onyx), has been one of the more active legacy institutions exploring next-generation payment rails.
For UK and European fintechs, JP Morgan's correspondent banking is most relevant at significant scale or for USD-denominated flows. The bank runs a Fintech Forward Programme in the UK — a structured engagement pathway, but full correspondent banking relationships are reserved for businesses with material transaction volumes and institutional credibility.
Best for: Enterprise-scale fintechs with significant USD or global payment volumes, or businesses needing investment-grade banking infrastructure for institutional counterparties.
Provider Comparison Table
Provider | Category | Key Payment Rails | Currencies | Best For | Website |
ClearBank | Neo-Infrastructure | Faster Payments, CHAPS, SEPA, SEPA Instant, T2 | GBP, EUR + | Fintechs, EMIs, embedded banking | |
Banking Circle | Neo-Infrastructure | SEPA, SEPA Instant, T2, Faster Payments, SIC (CHF) | EUR, GBP, DKK, SEK, AUD, CHF | High-volume PSPs, EMIs, cross-border platforms | |
Clear Junction | Neo-Infrastructure | Faster Payments, SEPA, SEPA Instant | GBP, EUR, multi | Regulated PSPs, EMIs, VASPs, remittance firms | |
Starling Banking Services | Neo-Infrastructure | Faster Payments, CHAPS, SEPA | GBP, EUR | Banks & fintechs licensing full-stack banking tech | |
Modulr | Neo-Infrastructure | Faster Payments, CHAPS, SEPA, SWIFT | GBP, EUR, USD + 8 more | Payroll, lending, software platforms, marketplaces | |
OpenPayd | Neo-Infrastructure | SEPA, SEPA Instant, T2, Faster Payments | 12 currencies incl. GBP & EUR | Named IBANs for clients, FX, treasury management | |
Equals Money / Railsr | Neo-Infrastructure | SEPA, Faster Payments, SWIFT | GBP, EUR, multi-currency | Embedded finance, BaaS, card issuing, FX | |
NatWest | Legacy | Faster Payments, CHAPS, SWIFT | GBP primary | Institutional GBP clearing, trade finance | |
Barclays | Legacy | SWIFT, CHAPS, Faster Payments, SEPA | GBP, EUR, USD, multi | Global SWIFT connectivity, cash management | |
JP Morgan | Legacy | SWIFT, CHAPS, Fedwire, SEPA | USD, GBP, EUR, global | Enterprise scale, USD clearing, institutional banking |
What to Look For When Choosing
Virtual IBANs and account segregation. If your product gives each client their own account number, you need a provider that issues unique IBANs, not pooled accounts with your name on top. Most neo-infrastructure providers can do this. Most legacy banks cannot, or make it painful.
Direct rail access vs. sponsored access. Some providers give you direct participation in Faster Payments, SEPA Instant, and T2. Others connect you via a sponsoring institution, which adds cost and latency. Know the difference before you sign.
API quality and integration speed. Your payments partner should feel like a technology partner. If the onboarding process involves PDFs and wet signatures, that tells you everything you need to know about what building with them will feel like.
Licence type. A full banking licence and an e-money licence are not the same thing. Banks can hold deposits and participate directly in clearing schemes. EMIs cannot hold deposits in the traditional sense and typically rely on a bank sponsor for certain functions. This affects your risk exposure and your product's permissible scope.
Who they're built for. Some providers are very explicitly built for fintechs — ClearBank's whole pitch is that it won't compete with you. Others are retail or corporate banks that have a fintech division bolted on. The former will generally be faster to work with, more developer-friendly, and more aligned with your growth trajectory.
Risk appetite and client acceptance. This matters more than people admit. If your business operates in crypto, cross-border remittance, or other higher-risk categories, your shortlist narrows quickly. Clear Junction is one of the few providers that has made a deliberate strategic decision to serve these segments under a compliance-first model rather than simply declining them.
The Bottom Line
The correspondent banking landscape in the UK and Europe is bifurcating rapidly. Legacy banks retain critical roles in deep liquidity, SWIFT corridor breadth, and institutional credibility — particularly at scale, or where you need USD clearing or trade finance. But for the majority of fintech infrastructure needs in 2025 — virtual IBANs, SEPA and Faster Payments access, embedded accounts, API-first integration — the neo-infrastructure providers have simply built better products.
If you're early-stage, start with a provider like ClearBank, Modulr, or Clear Junction. If you're scaling into Europe, Banking Circle's multi-currency IBAN infrastructure and direct scheme access is hard to beat. If you want to deploy a proven full-stack banking technology platform at institutional scale, Starling's Engine is in a category of its own. And if you need the credibility and corridor reach of a global bank for institutional relationships or USD flows, Barclays or JP Morgan remain the names that open doors.
The real question isn't which category is "better" — it's knowing which combination of providers gets you from where you are to where you're going, without the banking infrastructure becoming the bottleneck.
In the next section, we cover core banking infrastructure services, the back-end platforms that handle ledgering, account management, and payment processing at scale.
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