Best Banking-as-a-Service Providers in Europe: A 2026 Buyer's Guide

Banking-as-a-Service used to sound like a shortcut. A software company wanted accounts, cards, payments, or wallets inside its own product, and a BaaS provider made that possible without the company becoming a bank. Plug into an API, launch financial products, let the licensed provider handle the complexity.

That pitch still works — but the market it describes has been through a reckoning, and choosing a provider in 2026 means understanding it. Railsbank, once one of the sector's loudest names, went through administration in early 2023 and was rescued in a pre-pack sale; it has since been combined with the LSE-listed payments group Equals. Solaris, the sector's German flagship, lost its unicorn valuation, took a rescue round that handed Japan's SBI Group majority control, and still operates under BaFin restrictions that require regulator approval for new clients. Vodeno and its partner Aion Bank were bought outright by UniCredit — a traditional bank absorbing the model. Regulators across Europe concluded that renting out a banking licence at scale is one of the hardest compliance problems in finance, and the providers that remain are the ones that survived that conclusion.

So the best BaaS providers in Europe are not the ones with the slickest developer portal. They are the ones with the right licence, the right regulatory standing, the right rails, and the right fit for your use case. Here's how the main options actually compare.

Evaluating the broader build-vs-buy question first? Start with our guide to fintech outsourcing in Europe, then browse all Financial Infrastructure companies in the directory.

Comparison table

The providers

Solaris remains the most complete EU-wide platform on paper: a full German banking licence, passporting across the EU, and a modular API platform spanning accounts, cards, lending, and digital assets. The honest picture requires the last three years too. After compliance failures, a BaFin-appointed monitor, the loss of key clients, and a fine at its Lithuanian arm, Solaris took a €140 million rescue round in February 2025 that made SBI Group its majority owner at a fraction of its former $1.6 billion valuation; Visa and BBVA exited. In March 2026, under new CEO Steffen Jentsch, it announced a transformation into "Europe's first AI-native bank" and cut 20% of its roughly 400 staff. The capability is real and the SBI backing gives it runway — but BaFin approval is still required for each new client, which directly affects your launch timeline, and any buyer should price in both that process and the strategic transition under way.

ClearBank is the strongest UK-first option: a genuinely cloud-native regulated bank rather than middleware, with API-first accounts, real-time payments across Faster Payments and CHAPS, and an embedded banking model that can include sharing the interest revenue on customer balances. The old caveat — "UK only" — is outdated: ClearBank now operates an EU entity with its own Dutch banking licence. The fair version of the caution is that the European operation is much younger than the UK one, so verify product coverage market by market rather than assuming parity.

Swan is the most productised option for software companies. An e-money institution authorised by the ACPR, France's banking supervisor, it is built for SaaS and vertical platforms — proptech, HR tech, accounting, travel — that want accounts, cards, and payments inside their product with Swan handling KYC, AML, and fraud workflows. The company reports powering 150+ companies across 30 countries with €2 billion in monthly volume. The structural limit is the licence: an EMI cannot offer lending or bank-style deposit products, so roadmaps that end in credit need a bank-model provider instead.

Treezor is the mature French option: ACPR-regulated, passported to 25 countries, a Mastercard principal member, and owned by Société Générale since 2019 — institutional backing that changes its risk profile versus independent startups. It is strongest for card programmes, wallets, and account services across France, Germany, Benelux, Italy, and Iberia; like Swan, it is an EMI, so compare capabilities carefully if you need products beyond payments and cards.

Griffin is the interesting UK newcomer: both a technology company and a bank, licensed in 2024, describing itself as the UK's first full-stack BaaS bank. For UK fintech builders the combination of a regulated banking layer and developer-native APIs is genuinely attractive; the trade-off is scale and track record — it is far smaller than anything else on this list, and UK-only.

Modulr is best understood as embedded payments rather than full BaaS: accounts, payroll, bulk payments, payables, and money-movement automation through a well-documented API, with UK and EU entities. For operational finance workflows it is often the better-fitting tool than a full banking stack. Two diligence points: it is an EMI, not a bank, and the FCA restricted its onboarding of new partners in late 2023 — ask directly about the current status and what changed.

Banking Circle is the institutional pick — a Luxembourg-licensed bank providing accounts, cross-border payments, and banking infrastructure to payment companies, marketplaces, and financial institutions rather than to consumer-facing startups. If your business is itself a PSP or fintech needing bank-grade rails underneath, it belongs on the shortlist; if you want a plug-and-play embedded product, it doesn't.

OpenPayd rounds out the list for multi-currency accounts, FX, and embedded payments, with particular traction among digital-asset-adjacent businesses that other providers decline. It carries less enterprise brand weight than the licensed banks above, which matters in some procurement conversations and not at all in others.

How to choose

Start from the licence model, not the API docs. If your roadmap includes lending, deposits, or bank-style products, you need a bank-model provider — Solaris for the EU, ClearBank or Griffin for the UK. If you need accounts, cards, and payments inside a software product, the EMI models — Swan, Treezor, Modulr — are purpose-built for exactly that and simpler to work with.

Then apply the questions the last three years taught the market. Which regulator authorises the provider, and are there any current restrictions or approval requirements that affect your launch timeline? Who owns the end customer, and what are your respective AML responsibilities? How are customer funds safeguarded? What does exit look like — can you migrate your programme, and how long would it take? BaaS transfers the infrastructure, never the accountability: under EU and UK outsourcing rules, your regulator will hold you responsible for the arrangement you chose.

Finally, price the whole thing. BaaS pricing is quote-based everywhere — setup, per-account and per-card fees, volume tiers, compliance workload — and the vendor fee is the smaller half of the true cost. Integration time, compliance operations, fraud losses, support, and reconciliation are the larger half, and a more expensive provider that reduces them is frequently the cheaper decision.

FAQ

What is the best Banking-as-a-Service provider in Europe?
There is no single answer — the market splits by licence model and geography. Solaris is the most complete EU-wide bank-model platform, Swan and Treezor lead the EMI model for embedded accounts and cards across Europe, and ClearBank and Griffin are the strongest UK bank-model options.

Is Solaris a good BaaS provider?
It is the most capable EU-wide platform and now has committed majority backing from SBI Group — but it operates under BaFin restrictions requiring regulator approval of new clients, and is mid-way through a major strategic transformation. It can absolutely be the right choice; it simply demands more due diligence than any other name on this list.

What is the difference between BaaS and embedded finance?
BaaS is the infrastructure model: a licensed provider exposing banking capabilities to other companies via API. Embedded finance is the broader outcome — financial products of any kind, from payments to insurance to lending, appearing inside non-financial products. BaaS is one way of powering embedded finance.

Do I need a licence to use a BaaS provider?
Often not — that's the point of the model — but it depends on your product and role. Many partners operate as agents or distributors under the provider's licence; others need their own EMI or PI authorisation. Any credible provider will map this with you before contracts, and the answer should be in writing.

Which BaaS provider is best for SaaS companies?
Swan, by design — it treats banking as a feature of business software. Modulr fits when the need is payment automation rather than customer-facing accounts; ClearBank and Griffin fit UK SaaS products that need real bank accounts underneath.

Is BaaS risky?
The model concentrates regulatory, operational, and continuity risk in your provider, and the sector's recent history — Railsbank's administration, Solaris's rescue — shows that provider failure is a real scenario, not a hypothetical. The mitigations are boring and essential: regulatory standing checks, safeguarding clarity, contractual exit rights, and a written migration plan.

How much does BaaS cost?
Every provider on this list prices by quote, based on products, volumes, and risk profile. Budget separately for integration engineering and ongoing compliance operations — for most programmes those exceed the vendor fees.

All providers above are covered in the fintechdatabase.eu directory. For the infrastructure landscape beyond BaaS — core banking, KYC, payments — see the European fintech outsourcing guide.

Photo by Etienne Martin on Unsplash