European Core Banking Software

#1 Thought Machine

London, United Kingdom Founded 2014 Pricing on request Demo on request

Best for: Banks and fintechs that want a configurable cloud-native ledger and are ready to run a migration programme

• Operating company. Thought Machine Group Limited
• Jurisdiction. United Kingdom (adequacy decision, outside the EEA)
• Where the data sits. Cloud deployment, region agreed with the client (not stated on the website)
• Source code. Closed source
• Replaces. Fiserv, FIS, Jack Henry

Thought Machine in London sells the Vault platform in two parts: Vault Core, a real-time ledger, and Vault Payments for payment orchestration, account-to-account payments and card processing. What sets the design apart is that products are defined in a separate configuration layer, and the vendor states that the same codebase ships to every client without forks. A bank that buys it commits to working inside that model, and to a migration programme that the vendor itself calls the real project.

The company was founded in 2014 and describes Lloyds Banking Group as its first tier 1 client in 2016. The contracting company is Thought Machine Group Limited, registered in England and Wales under 11114277, so the contract is British, outside the EU. According to the vendor, processing runs across three availability zones with automated failover. No price, hosting region or fixed migration timeline is published.

Standout feature. Product rules are written as configuration on one shared codebase, so a bank changes a product without waiting for a vendor release.

#2 Mambu

Amsterdam, Netherlands Pricing on request Demo on request

Best for: Lenders, neobanks and fintechs that want to assemble a banking stack from modules

• Operating company. Mambu B.V.
• Jurisdiction. EU (Netherlands)
• Where the data sits. Not stated on the website
• Source code. Closed source
• Replaces. Fiserv, FIS, Jack Henry

Mambu in Amsterdam splits its platform into Mambu Core for deposits and lending, Mambu Payments and an AI layer called Agentic. Lending is cut into consumer loans, business loans, purchase finance and retail mortgages, and deposits into consumer, business and stored value accounts. Islamic funding and financing products have their own modules, which makes the product list unusually granular for a SaaS core.

The imprint names Mambu B.V., Piet Heinkade 55, register number 862181227, and the homepage says hundreds of customers in 65+ countries use the platform. Public API reference, release notes, a community and a status page are linked from the site. Pricing and hosting regions are not published, and the imprint does not say which group company signs customer contracts, so confirm that point in the tender.

Standout feature. A lender can start with one product module and add the next later, with the API documentation public from day one.

#3 Skaleet

Boulogne-Billancourt, France Pricing on request Demo on request

Best for: Banks, neobanks, PSPs and BaaS users that want an EU-hosted SaaS core

• Operating company. SKALEET
• Jurisdiction. EU (France)
• Where the data sits. EU-based data centres, private cloud
• Source code. Closed source
• Replaces. Fiserv, FIS, Jack Henry

Skaleet in Boulogne-Billancourt offers a SaaS core with three entry points: a greenfield launch it calls Speedboat, a move from BaaS to SaaS, and legacy migration. The standalone modules cover accounts and cards, payments, loans and savings, customers and process automation, on an event-driven, API-centric design. The vendor gives implementation as 4 to 6 months depending on the use case and releases every two months.

On hosting, the vendor says it runs EU-based private-cloud data centres that are not subject to the US Cloud Act. The legal entity, SKALEET with SIREN 484939038, is listed in the French company register; the website shows only a copyright line and no legal notice. The homepage mentions a Euromoney award for 2026, a vendor statement, and the customer stories name Caisse d'Epargne Hauts de France and SSP. On-premise delivery is not offered.

Standout feature. It is the core in this category whose main pitch is EU-based private cloud outside the US Cloud Act.

#4 10x Banking

London, United Kingdom Pricing on request Demo on request

Best for: Banks, building societies and non-bank lenders replacing a legacy core

• Operating company. 10x Banking Technology Limited
• Jurisdiction. United Kingdom (adequacy decision, outside the EEA)
• Where the data sits. Not stated on the website
• Source code. Closed source
• Replaces. Fiserv, FIS, Jack Henry

10x Banking in London describes its platform as a fourth-generation core and publishes a practical guide on how to buy one. The solution pages address alternative finance, customer-owned banks and building societies, embedded finance, and retail and personal banking, on a SaaS platform that covers retail and corporate accounts together.

Three AI functions are listed: AI Build, which drafts product configuration from a plain-English brief, AI Learn, which answers questions from live data, and AI Migrate, which maps legacy data.

The homepage quotes more than 100 million accounts, 99.99 percent uptime and over 10,000 transactions per second, all vendor figures with no audit linked. Case studies include Chase UK, West Brom Building Society, Westpac and Remara. The entity is 10x Banking Technology Limited, company number 10146101; no hosting region or price is stated.

Standout feature. The AI Migrate function targets the legacy-data mapping step that decides whether a core replacement stalls.

#5 Temenos

Grand-Lancy (Geneva), Switzerland Pricing on request Demo on request

Best for: Banks of any size that want a long-established core with on-premise, cloud and SaaS options

• Operating company. Temenos Headquarters SA
• Jurisdiction. Switzerland (adequacy decision, outside the EEA)
• Where the data sits. Depends on deployment: on-premises, cloud or Temenos SaaS
• Source code. Closed source
• Replaces. Fiserv, FIS, Jack Henry

Temenos is organised as four product families: core banking, digital banking, payments and wealth management, plus an innovation platform for AI and cloud. Segment pages cover retail, corporate, wealth, credit unions, community banks and Islamic banking. The vendor claims its Core Banking is used by over 950 banks and lists 52 offices in 36 countries.

The privacy policy names Temenos Headquarters SA in Grand-Lancy, Geneva, as controller, with Temenos Systems Ireland Ltd as EU representative; Switzerland holds an adequacy decision but is outside the EEA. Deployment can be on-premises, in the cloud or as Temenos SaaS, and delivery, sales and technology partner programmes are listed, so most projects involve an integrator. Prices are not published, and a small lender may pay for modules it never uses.

Standout feature. It is the only vendor in this category that lets a bank choose between its own servers, a cloud and SaaS for the same product family.

#6 Engine by Starling

London, United Kingdom Pricing on request Demo on request

Best for: Banks launching a new digital bank or a sidecar proposition on a proven platform

• Operating company. Engine by Starling Limited
• Jurisdiction. United Kingdom (adequacy decision, outside the EEA)
• Where the data sits. Not stated on the website
• Source code. Closed source
• Replaces. Fiserv, FIS, Jack Henry

Engine by Starling packages core banking products, a management portal for operations and mobile SDKs for the customer app as a pre-integrated digital bank. The vendor says the platform has run Starling since 2016, and quotes Starling's 2025 annual report figures of 6.2 million group accounts and 79 percent active customers, which were not checked here. The site describes a real-time, always-on cloud-native platform.

The entity is Engine by Starling Limited, England and Wales, number 13925405, with a registered office at London Fruit and Wool Exchange and a Starling Bank copyright in the footer. It lists six locations and over 400 staff. Salt Bank is the featured customer, with its CEO saying Engine let it meet a 12-month project timeline. Hosting and pricing are not published, and the sister-bank relationship means fewer independent references.

Standout feature. The platform's proof is a live consumer bank run by the same group that sells it.

#7 Crosskey

Mariehamn (Åland), Finland Pricing on request Demo on request

Best for: Nordic and European banks that want a modular transactional core with payments and lending

• Operating company. Crosskey Banking Solutions Ab Ltd
• Jurisdiction. EU (Finland)
• Where the data sits. Personal data processed inside the EU/EEA as a rule (website privacy statement)
• Source code. Closed source
• Replaces. Fiserv, FIS, Jack Henry

Crosskey in Mariehamn, Åland, sells a Transactional Banking Platform that connects onboarding, customer data, account management, payments, credit origination and loan servicing. The customer module carries AML and KYC checks, and lending includes configurable scoring and approval rules. Banks can deploy capabilities independently or combine them into a full solution.

The group also lists a Cards Platform, a Wealth Management Platform, open banking APIs, Verification of Payee and a Swift Service Bureau.

The privacy statement names Crosskey Banking Solutions Ab Ltd, EU ID FI 19066720, and says personal data on the website is processed inside the EU/EEA as a rule. The vendor cites over 20 years of experience and talks about implementing, operating and developing together with customers. The site has no technical documentation, price or stated deployment model, and its wording is Nordic-regulated.

Standout feature. It sells payments, deposits and lending as one connected platform that still deploys capability by capability.

#8 SBS

Courbevoie (registered in Annecy), France Pricing on request Demo on request

Best for: Banks and building societies modernising a core domain by domain

• Operating company. SBS
• Jurisdiction. EU (France)
• Where the data sits. Not stated on the website
• Source code. Closed source
• Replaces. Fiserv, FIS, Jack Henry

SBS pitches a progressive exit from legacy: keep the stable core running, shift domain by domain to a modular, API-first, cloud-native core, and run old and new in parallel. The core is advertised with more than 250 modules across deposits, lending, savings, payments, cards, open banking and regulatory reporting, with a lending range that includes asset finance and wholesale financing.

The terms of use give share capital of €161,866,820, registration in Annecy under 450 792 999 and headquarters at Courbevoie, and the footer says SBS is part of 74Software. Regional editions differ: Core Amplitude for Africa, the Core Mortgage and Savings Suite in the UK, Core SAB in France. Client numbers differ between pages (280+ on one, 1,500+ on another), so we cite neither. Prices and hosting are not published.

Standout feature. Its migration story is explicitly parallel: one domain at a time, old and new core together.

#9 ERI OLYMPIC Banking System

Meyrin (Geneva), Switzerland Pricing on request Demo on request

Best for: Private banks, custodians and fund administrators that need a front-to-back platform

• Operating company. ERI Bancaire S.A.
• Jurisdiction. Switzerland (adequacy decision, outside the EEA)
• Where the data sits. Not stated on the website
• Source code. Closed source
• Replaces. Fiserv, FIS, Jack Henry

ERI Bancaire's OLYMPIC Banking System is described as fully integrated from front to back and fully configurable. The expertise list covers core banking, savings and loans, portfolio management, advisory, custody, fund administration and order management, with CRM, client onboarding and loan management alongside. The platform therefore suits institutions whose business is investment as much as accounts.

The vendor says about 400 banks and financial institutions in over 60 countries have used it over 30 years.

ERI Bancaire S.A. is in Meyrin near Geneva, and the offices page also lists ERI Bancaire Luxembourg S.A., ERI Bancaire Paris, ERI Bancaire Madrid SL, ERI Banking Software Limited in London and a Singapore entity, so the signing company depends on the country. SaaS and cloud delivery are described, with ISO 20022 and real-time straight-through processing. Hosting regions and prices are not published.

Standout feature. Custody and fund administration come inside the same product as the core, not as a separate purchase.

#10 Avaloq

Zurich, Switzerland Pricing on request Demo on request

Best for: Wealth managers and private banks that want one platform for front to back

• Operating company. Avaloq Group Ltd.
• Jurisdiction. Switzerland (adequacy decision, outside the EEA)
• Where the data sits. Not stated on the website
• Source code. Closed source
• Replaces. Fiserv, FIS, Jack Henry

Avaloq runs a bank's banking and wealth business on one integrated cloud-based platform, according to its site. The range covers digital channels, client management, investment management, trading, lending and credit, payments, treasury, risk and compliance, with AI agents listed for automation and a partnership with Aladdin by BlackRock. Banking Operations are offered as business process as a service, alongside managed services and an academy.

The terms identify Avaloq Group Ltd., Allmendstrasse 140, Zurich, under Swiss law with Zurich courts. The vendor claims 170+ clients in 35 countries, USD 5.1 trillion in assets on the software and R&D above 20 percent of annual software revenue. Ownership, founding year and hosting regions are not stated, and the website blocks automated reading, so only the home, legal and information pages could be checked.

Standout feature. A bank can outsource its banking operations to the vendor that also supplies the platform.

#11 SDK.finance

Vilnius, Lithuania SaaS: first 3 months EUR 10,000 flat, then EUR 5,500 per month plus EUR 0.05 per transaction; source-code licence on request Demo on request

Best for: Fintechs, EMIs and PSPs launching a product, and banks that want to own the source code

• Operating company. TechFin UAB
• Jurisdiction. EU (Lithuania)
• Where the data sits. On-premises or cloud, chosen by the client
• Source code. Closed source
• Replaces. Fiserv, FIS, Jack Henry

SDK.finance in Vilnius sells a transaction platform for payment products and a standalone general ledger that converts business events into double-entry journal entries. The core banking page covers individual and corporate accounts, cards and IBANs, KYC/KYB integration and a merchant side, with 650+ REST APIs, a back-office admin panel and iOS and Android apps in the package.

It is the only vendor here to publish a price: €10,000 flat for three months, then €5,500 per month plus €0.05 per transaction. A source-code licence for the client's own infrastructure, with 12 months of support and updates, is available on request. The site lists PCI DSS Level 1 Service Provider status and ISO 27001:2022. TechFin UAB, registration 305153451, says it is not a bank or payment institution, so the licence has to come from the client or a partner.

Standout feature. It combines a public SaaS tariff with the option to buy the source code.

#12 Vodeno

Warsaw, Poland Pricing on request Demo on request

Best for: Businesses launching banking-as-a-service products without their own licence

• Operating company. Vodeno sp. z o.o.
• Jurisdiction. EU (Poland)
• Where the data sits. Not stated on the website
• Source code. Closed source
• Replaces. Fiserv, FIS, Jack Henry

Vodeno in Warsaw combines a cloud-native platform with access to a full banking licence through its partnership with Aion Bank. Its HiLo core uses smart contracts, which the vendor describes as self-executing code on blockchain technology, with a no-code visual designer and AI help in building contracts. Services include digital onboarding, accounts with European IBANs, lending and BNPL, payments with live FX and card issuing with Mastercard.

The privacy policy names Vodeno sp. z o.o., KRS 0000728418, with share capital of PLN 218,655,400. The vendor claims 500+ controls and compliance with EBA, GDPR and ISO 27001, and offers outsourced transaction monitoring and reporting. When checked, the website footer showed 2024 and the home page carried placeholder text. No price is published, and the regulated relationship runs through the partner bank, not through Vodeno.

Standout feature. It is the only option here that brings access to a partner bank's licence with the platform.