Banking software has to do more than process transactions and display account balances. It must protect sensitive data, connect with older systems, support changing regulations, and remain dependable when thousands of customers use it at once. Not every provider approaches banking in the same way. One may be strongest in core system modernisation, while another is a better fit for a mobile banking product, a lending platform, or a difficult integration with ageing infrastructure. The list below looks at 17 providers and, more importantly, the kinds of banking projects for which each one appears most relevant.
1. Itexus
Itexus provides banking software development services to organisations across the UK, working remotely from our US headquarters and European development offices. Our work covers mobile and online banking, digital account opening, payment infrastructure, digital wallets, card management, lending, transaction monitoring, and core banking integrations. We also develop customer dashboards and back-office tools for banks, credit unions, neobanks, BaaS providers, and fintech businesses.
We can stay with a banking project from its early discovery stage through architecture, interface design, engineering and release. After launch, our role may continue with maintenance, performance improvements and new functionality. We work with banking APIs, payment gateways, KYC and AML providers, credit bureaus, and older banking systems. Security and compliance are addressed while the system is being designed. That includes decisions around access rights, audit trails, documentation and the handling of sensitive financial data not a last-minute review just before release.
Key Highlights:
- Provides banking software development services to UK organisations
- Experience with regulated and integration-heavy financial products
- Supports new development and gradual legacy system modernisation
- Covers web, mobile, backend, cloud, and data engineering
- Builds security and compliance requirements into the delivery process
Services:
- Software development for banking
- Core banking integration and modernisation
- Digital onboarding and KYC automation
- Payment and digital wallet development
- Card issuing and management software
- Digital lending and credit scoring systems
- Banking process automation
- Quality assurance and security testing
- Cloud engineering and post-launch support
Contact Information:
- Website: itexus.com
- Email: [email protected]
- Address: 8, The Green, STE road, Dover, DE 19901, United States
- LinkedIn: www.linkedin.com/company/itexus
- Facebook: www.facebook.com/itexus
- Twitter: x.com/ItexusSoft
- Instagram: www.instagram.com/itexus.soft
2. ELEKS
ELEKS develops custom banking software for financial institutions that need to update internal operations or introduce new digital services. Their work includes online and mobile banking platforms, core banking systems, loan origination and servicing software, EMV solutions, and software for ATM networks. They also build customer portals that allow users to manage accounts, transfer funds, pay bills, and access other banking functions remotely.
ELEKS usually starts by examining the bank’s existing processes and technical constraints. The findings then shape the architecture and development work, including data engineering, security testing and deployment. This approach is suitable for banking projects where the software must fit established processes, connect with existing infrastructure, and protect financial and customer information.
Key Highlights:
- Focuses on custom software for banks and financial organisations
- Works with customer-facing and internal banking systems
- Combines software engineering with data, AI, and cybersecurity skills
- Supports projects from early research through long-term maintenance
- Handles both new applications and legacy software modernisation
Services:
- Online banking software
- Mobile banking applications
- Core banking systems
- Loan origination and servicing platforms
- ATM and EMV software
- Business analysis and requirements management
- Data engineering and artificial intelligence
- Cybersecurity and quality assurance
- Legacy system modernisation
- Cloud and DevOps support
Contact Information:
- Website: eleks.com
- Facebook: www.facebook.com/ELEKS.Software
- Twitter: x.com/ELEKSSoftware
- LinkedIn: www.linkedin.com/company/eleks
- Address: Moor Place, 1 Fore Street Avenue, London, United Kingdom, EC2Y 9DT
- Phone: +44-20-4583-0843
3. Andersen
Andersen provides banking software development through its UK presence in London. They work on digital banking applications, integration layers, core banking components, loan management systems, and software used by bank employees and customers. Their teams can build complete systems or provide developers for a defined part of a banking project.
Their banking work also covers CRM and ERP platforms, payment processing, document management, data storage, fraud prevention, and credit scoring. For organisations dealing with older infrastructure, they can modernise existing banking software and connect new services through APIs, middleware, message queues, and other integration tools. Their listed compliance areas include AML, PCI DSS, PSD2, and GDPR.
Key Highlights:
- Has a representative office in London
- Works on customer-facing and back-office banking software
- Provides full project delivery and staff augmentation
- Supports banking integrations and legacy platform modernisation
- Considers financial regulations and data protection requirements
Services:
- Digital and mobile banking development
- Core banking software
- Banking integration solutions
- Loan management systems
- Payment processing software
- Banking CRM and ERP development
- Fraud prevention and credit scoring tools
- Data and machine learning solutions
- Legacy banking software modernisation
- Quality assurance, DevOps, and business analysis
Contact Information:
- Website: andersenlab.com
- E-mail: [email protected]
- Address: 1 St Katharine’s Way, 6th floor, London E1W 1YL, UK
- Phone: +44 207 048 6755
- Facebook: www.facebook.com/AndersenSoftwareDev
- Twitter: x.com/AndersenLabs
- LinkedIn: www.linkedin.com/company/andersen-lab
- Instagram: www.instagram.com/andersen.global
4. Pulsion
Pulsion develops custom banking software from its office in Glasgow. They work with banks, fintech companies, and other financial organisations on digital banking platforms, mobile applications, account management systems, ATM software, and embedded finance products. Much of this work involves fitting new customer and transaction tools around infrastructure that a bank already relies on and cannot simply switch off during development.
They also review and modernise older software, improve financial data flows, and build reporting tools for internal teams. Security and compliance form part of the development work, including encryption, audit controls, risk management features, fraud detection, and anti-money laundering processes. Where appropriate, they add open banking APIs, digital wallets, analytics, and AI functions to existing or newly built platforms.
Key Highlights:
- Based in Glasgow, Scotland
- Develops software for banks and fintech companies
- Works with new platforms and existing banking systems
- Covers security, compliance, reporting, and data management
- Provides development, testing, deployment, and ongoing improvement
Services:
- Custom banking software development
- Digital and mobile banking platforms
- Account management systems
- Core banking integration
- Banking software audits
- Legacy system modernisation
- Open banking API integration
- Data analytics and reporting
- Compliance and risk management tools
- Quality assurance and cloud migration
Contact Information:
- Website: www.pulsion.co.uk
- E-mail: [email protected]
- LinkedIn: www.linkedin.com/company/pulsion-technology
- Address: 5 Eagle Street, Craighall Business Park, Glasgow, G4 9XA
- Phone: +441413522280
5. Vention
Vention provides banking software development services through its London office. They build systems for retail, commercial, investment, private, and digital banks, as well as building societies, credit unions, and fintech businesses. Their work includes core banking platforms, customer relationship management software, digital banking products, ATM systems, investment tools, and loan management applications.
A considerable part of their banking work concerns integration and modernisation. They create APIs, middleware, and connectors that allow banking systems to exchange data with payment services and other third-party platforms. They also update older applications, add new functions, and support requirements related to GDPR, PSD2, PCI DSS, AML, access control, audit trails, and security testing.
Key Highlights:
- Has an office and UK team in London
- Works with different types of banks and financial institutions
- Supports complete projects and team extension arrangements
- Handles legacy modernisation and third-party integrations
- Includes UK banking compliance in software planning and development
Services:
- Bespoke banking software development
- Core banking systems
- Banking CRM development
- Digital banking applications
- API development and system integration
- Open banking enablement
- Loan and investment management software
- ATM software
- AI-based fraud and risk tools
- Maintenance and post-launch support
Contact Information:
- Website: ventionteams.com
- E-mail: [email protected]
- Twitter: x.com/ventionteams
- LinkedIn: www.linkedin.com/company/ventionteams
- Instagram: www.instagram.com/ventionteams
- Address: 30 Churchill Place, E14 5RE, London
- Phone: +442071172842
6. Appinventiv
Appinventiv develops custom fintech software for UK financial organisations and has a presence in London. Their banking work is aimed at retail, commercial, and investment banks that need software built around their own processes. This can include customer applications, internal platforms, transaction-related functions, and other digital tools used across banking operations.
Their wider development capabilities cover product planning, software engineering, AI, data analytics, cloud services, and cybersecurity. For banking projects, they use scalable system architecture and an agile development process, with attention to security and regulatory requirements. They can also introduce automation and real-time reporting where these functions support financial workflows.
Key Highlights:
- Provides fintech software development services in the UK
- Has a presence in London
- Works with retail, commercial, and investment banking needs
- Combines product engineering with AI, data, and cloud skills
- Builds software around specific financial processes
Services:
- Custom banking software development
- Fintech product development
- Web and mobile application development
- Backend and microservice development
- Banking process automation
- Real-time reporting
- AI and data analytics
- Cloud engineering
- Cybersecurity
- Technology consulting
Contact Information:
- Website: appinventiv.com
- Twitter: x.com/appinventiv
- LinkedIn: www.linkedin.com/company/appinventiv
- Instagram: www.instagram.com/appinventiv
- Address: 3rd Floor, 86-90 Paul Street, EC2A 4NE, London, UK
- Phone: +44-753-900-0641
7. Limeup
Limeup develops banking software from its London office, working on web and mobile products for financial organisations. Their services cover digital banking platforms, banking websites, eWallets, trading systems, account management, transaction history, notifications, and fraud monitoring. They build custom products that can connect with existing systems rather than requiring a financial institution to replace its whole technology setup.
Projects move from requirements and interface design into short development cycles, followed by security checks and deployment. Limeup can also remain involved after release to maintain the product and introduce new features. During the planning stage, they consider user needs, technical limits, and rules such as PSD2 and GDPR. They also work with API integrations, multi-currency payments, real-time data, automated reporting, and access controls for products that handle sensitive financial information.
Key Highlights:
- Has an office in London
- Develops web and mobile banking products
- Works with custom and existing financial systems
- Considers compliance and security during development
- Provides support after the initial release
Services:
- Custom banking software development
- Digital banking platforms
- Mobile and web banking applications
- eWallet development
- Payment and transfer functions
- API and system integration
- Banking UX and UI design
- Security and penetration testing
- Fraud monitoring tools
- Maintenance and feature updates
Contact Information:
- Website: limeup.io
- E-mail: [email protected]
- Facebook: www.facebook.com/limeup.io
- Twitter: x.com/limeup_io
- LinkedIn: www.linkedin.com/company/limeup
- Instagram: www.instagram.com/limeup.io
- Address: Queens House, 180 Tottenham Ct Rd, London W1T 7PD
- Phone:+44 20 3807 8245
8. Hidden Brains
Hidden Brains provides banking and finance software development from its UK office in Andover. They create web and mobile applications that help financial institutions manage accounts, loans, assets, payments, and other parts of their daily operations. Their work also includes customer-facing products intended to provide access to financial services across different digital channels.
The company develops integrations between new applications, banks, and existing internal systems. Depending on the project, they can add expense tracking, financial planning, digital wallet transfers, stock data feeds, and optical character recognition for invoices and receipts. They support the work from early planning and design through development, release, and later optimisation.
Key Highlights:
- Has a UK office in Andover
- Works on banking and financial web and mobile applications
- Develops customer-facing and internal management tools
- Connects new software with existing banking systems
- Offers full project teams and individual developers
Services:
- Banking software development
- Mobile and web application development
- Account and asset management systems
- Loan management software
- Payment management tools
- Digital wallet functions
- Bank and subsystem integration
- Financial planning software
- Stock API integration
- Application support and optimisation
Contact Information:
- Website: www.hiddenbrains.co.uk
- Email: [email protected]
- Facebook: www.facebook.com/HiddenBrains
- Twitter: x.com/HiddenBrains
- LinkedIn: www.linkedin.com/company/hiddenbrains-infotech
- Address: Unit P Hunting Gate, East Portway, Andover, Hampshire, SP10 3ER, UK
- Phone: +44 (0)20-7993-2188
9. TatvaSoft
TatvaSoft develops financial software through its UK operation in London. TatvaSoft’s financial work tends to involve processes that are difficult to manage with generic software, particularly lending approvals, financial records and workflows affected by regulatory change. They build secure web, mobile, and custom applications that can support lending, customer services, financial records, approvals, and other banking-related workflows.
One area of their financial work is paperless lending, where separate loan departments can use shared workflows for document processing and approvals. They also develop systems for foreign exchange, pension management, insurance, claims, and financial reporting. Projects can include planning, development, testing, implementation, maintenance, and the extension of an internal team with additional developers.
Key Highlights:
- Has an office in London
- Develops custom software for finance-related organisations
- Supports regulated and process-heavy financial workflows
- Works across web, mobile, cloud, and backend development
- Provides product maintenance and team extension options
Services:
- Custom financial software development
- Paperless lending systems
- Loan workflow automation
- Foreign exchange software
- Pension fund management systems
- Financial web development
- Mobile application development
- Product development and maintenance
- Cloud and DevOps services
- Dedicated development teams
Contact Information:
- Website: www.tatvasoft.com
- Email: [email protected]
- LinkedIn: www.linkedin.com/company/tatvasoft
- Facebook: www.facebook.com/TatvaSoft
- Twitter: x.com/tatvasoft
- Address: 307, Euston Road, London NW1 3AD, United Kingdom
- Phone: +44 742 409 8452
10. Daffodil Software
Daffodil Software provides banking IT services through its London office. Their work covers central banking platforms, mobile and cloud banking, loan management, eWallets, open banking, and API implementation. One practical theme in Daffodil Software’s banking work is consolidation. Instead of leaving customer data, operational processes and management tools spread across separate applications, they can bring them into a more connected environment.
Their teams can take a banking product from feasibility research and prototyping through design, development, testing, maintenance, and cloud management. Security is handled as part of the software architecture, with threat modelling, vulnerability checks, penetration testing, and compliance work included where required. They also apply AI, robotic process automation, and blockchain to selected banking processes.
Key Highlights:
- Has an office in London
- Provides full-cycle banking software development
- Works with core, mobile, cloud, and open banking systems
- Supports new products and legacy system modernisation
- Includes security and compliance in the development process
Services:
- Core banking software
- Mobile banking development
- Cloud banking systems
- Loan management software
- eWallet development
- Open banking and API integration
- Product discovery and prototyping
- Legacy software modernisation
- Application security and testing
- Software support and maintenance
Contact Information:
- Website: www.daffodilsw.com
- E-mail: [email protected]
- Facebook: www.facebook.com/daffodilsw
- Twitter: x.com/daffodilsw
- LinkedIn: www.linkedin.com/company/daffodil-software-ltd-
- Address: 124 City Road, EC1V 2NX, London, UK
- Phone: +1 518 676 2958
11. Software Planet Group
Software Planet Group is headquartered in Guildford and develops custom financial software for UK businesses. Their work includes investment and trading platforms, digital wallets, payment tools, asset management systems, and software for storing and reporting financial data. These capabilities can also support banks that need customer-facing applications or internal tools built around specific workflows.
They develop integrations with payment processors, accounting platforms, KYC services, and other third-party systems. Their regulatory technology work covers identity checks, customer due diligence, tax reporting, and compliance monitoring. Projects may start with a prototype or MVP and continue through full development, quality assurance, DevOps, release, and later changes to the product.
Key Highlights:
- Headquartered in Guildford
- Builds bespoke financial and banking-related software
- Works with payments, KYC, reporting, and financial data
- Provides full development teams with different technical roles
- Handles both new products and older software
Services:
- Mobile banking application development
- Payment processing integration
- Digital wallet development
- Asset and fund management systems
- Financial data warehousing
- KYC and customer due diligence tools
- Regulatory reporting software
- API and middleware development
- Legacy software refactoring
- Quality assurance and DevOps
Contact Information:
- Website: softwareplanetgroup.co.uk
- E-mail: [email protected]
- Phone: +441483802423
- Facebook: www.facebook.com/softwareplanetgroup
- LinkedIn: www.linkedin.com/company/software-planet-group
- Address: Austen House, Station View, Guildford GU1 4AR, UK
12. A-listware
A-listware provides software development and IT consulting from its UK location in St. Leonards-on-Sea. Banking is one of the financial areas they list within their industry experience, alongside payments, lending, insurance, and investment. A-listware is less about supplying an off-the-shelf banking platform and more about adding engineering capacity to work already underway. This may mean one specialist, a dedicated team or a managed development unit.
For banking organisations, they can supply skills across backend, frontend, mobile, cloud, data, DevOps, interface design, cybersecurity, and testing. This setup may suit a bank that already has its product requirements but needs extra engineering capacity for a new application, system update, integration, or modernisation project. They also provide management and technical support for cloud-based and on-premises systems.
Key Highlights:
- Has a location in St. Leonards-on-Sea
- Lists banking and other financial sectors among its areas of work
- Focuses on outsourced and dedicated development teams
- Covers software engineering, testing, infrastructure, and security
- Can support cloud and on-premises applications
Services:
- Custom software development
- Banking development team extension
- Web and mobile application development
- Legacy software modernisation
- Cloud application development
- Data analytics
- UI and UX design
- Testing and quality assurance
- Cybersecurity services
- Managed IT and help desk support
Contact Information:
- Website: a-listware.com
- Email: [email protected]
- LinkedIn: www.linkedin.com/company/a-listware
- Facebook: www.facebook.com/alistware
- Address: St. Leonards-On-Sea, TN37 7TA, UK
- Phone: +44 (0)142 439 01 40
13. Itransition
Itransition develops banking software through its London office for retail, commercial, investment, private, central, and digital banks. Their work ranges from tools for individual banking processes to larger systems that handle accounts, payments, loans, deposits, transfers, currency exchange, and reporting. They also create online portals, mobile banking apps, CRM platforms, loyalty tools, and ATM software.
Their teams cover architecture, interface design, frontend and backend development, integration, deployment, and configuration. They can connect banking platforms through APIs and middleware or replace outdated links between legacy systems. Other areas include software modernisation, financial analytics, fraud detection, KYC and AML checks, investment risk modelling, and process automation.
Key Highlights:
- Has an office in London
- Develops customer-facing and internal banking systems
- Works with cloud and on-premises environments
- Supports legacy software modernisation
- Covers data security and financial compliance requirements
Services:
- Core banking system development
- Online and mobile banking applications
- Account and payment management software
- Loan and deposit management systems
- Banking CRM development
- API and middleware integration
- Legacy banking software modernisation
- Financial data analytics
- Fraud detection and risk management tools
- Robotic process automation
Contact Information:
- Website: www.itransition.com
- E-mail: [email protected]
- Facebook: www.facebook.com/Itransition
- Twitter: x.com/itransition
- LinkedIn: www.linkedin.com/company/itransition
- Address: Office 3-01, 3rd Floor, 3 Shortlands, London, W6 8DA
- Phone: +44 7949 997 881
14. N-iX
N-iX provides software engineering for banks, fintech companies, and other financial organisations through its UK office. Their banking work includes lending, payments, fraud prevention, customer verification, cybersecurity, compliance, and the modernisation of business processes. They support retail, corporate, and investment banks, including organisations moving towards digital or neobank models.
N-iX takes a phased approach to older core banking, CRM and process-management software. Individual functions can be moved gradually, allowing the bank to keep essential services running instead of attempting one disruptive replacement. Their teams also develop front-office tools, data platforms, cloud systems, and AI models for fraud detection, risk assessment, and customer service. Security measures can include encryption, secure APIs, multifactor authentication, biometric checks, and ongoing monitoring.
Key Highlights:
- Maintains a UK office
- Works with banks and other financial services organisations
- Uses phased methods for replacing legacy banking systems
- Combines software, cloud, data, AI, and cybersecurity skills
- Provides post-deployment support for financial systems
Services:
- Banking software development
- Lending and payment solutions
- KYC and AML systems
- Fraud prevention software
- Core banking re-platforming
- Business process modernisation
- Front-office applications
- Regulatory compliance tools
- Cloud migration and management
- Data analytics and AI development
Contact Information:
- Website: www.n-ix.com
- E-mail: [email protected]
- Facebook: www.facebook.com/N.iX.Company
- Twitter: x.com/N_iX_Global
- LinkedIn: www.linkedin.com/company/n-ix
- Address: London, EC3A 7BA, 6 Bevis Marks
- Phone: +442037407669
15. Chetu
Chetu develops banking software from its UK location in Birmingham. Their services cover core banking systems, online banking websites, mobile applications, loan platforms, ACH processing, and ATM software. They work with financial institutions that need a new system, an additional module, or a connection between an existing banking platform and another service.
Their mobile and web products can include bill payments, remote cheque deposits, SMS banking, customer messaging, and account access across different devices. They also develop loan origination, servicing, decision support, settlement, and automated billing tools. For infrastructure-related work, their developers handle core banking APIs, ATM hardware links, security updates, EMV migration, and integration with CRM databases.
Key Highlights:
- Has a UK location in Birmingham
- Develops banking software for web, mobile, and ATM channels
- Works with core banking and loan management systems
- Provides on-demand developers and product support
- Includes security and compliance features in banking platforms
Services:
- Core banking software development
- Online banking websites
- Mobile banking applications
- Loan origination and servicing systems
- Loan decision support tools
- ACH and electronic cheque processing
- ATM software and hardware integration
- Remote deposit capture
- Banking API integration
- Security, maintenance, and software upgrades
Contact Information:
- Website: www.chetu.com
- E-mail: [email protected]
- Facebook: www.facebook.com/ChetuInc
- Twitter: x.com/ChetuInc
- LinkedIn: www.linkedin.com/company/chetu-inc-
- Address: 83 Hagley Road, Part 1 First Floor, Birmingham, B168QG United Kingdom
- Phone: +44 137 243 2466
16. GoodCore
GoodCore develops custom financial software from its office in Croydon. They work across banking, lending, investment, trading, insurance, and consumer finance. Their banking-related projects can involve new digital platforms, customer-facing applications, loan management systems, or changes to software already used in day-to-day operations.
GoodCore starts with discovery and, where necessary, a prototype before committing to the full build. Testing, deployment and maintenance follow, but the early work is intended to clarify the product before the more expensive engineering stages begin. Compliance and security requirements are considered during design and engineering, followed by functional and security testing before release. They also modernise older systems in stages, with attention to service continuity, existing integrations, and the need to avoid unnecessary rewrites.
Key Highlights:
- Based in Croydon and registered in England and Wales
- Develops custom software for banking and financial services
- Works on new platforms and legacy system modernisation
- Builds compliance and security into the development process
- Provides maintenance and regulatory updates after launch
Services:
- Custom banking software development
- Financial platform development
- Loan management systems
- Customer-facing web and mobile applications
- Legacy banking software modernisation
- System and data integration
- UX and UI design
- Software testing and compliance checks
- Security audits
- Ongoing support and maintenance
Contact Information:
- Website: www.goodcore.co.uk
- E-mail: [email protected]
- Facebook: www.facebook.com/goodcoresoftware
- LinkedIn: www.linkedin.com/company/goodcore-software
- Address: Airport House, Purley Way, Croydon CR0 0XZ
- Phone: 020 8781 6903
17. Scott Logic
Scott Logic is a UK software consultancy with a particular focus on financial services and regulated organisations. Their retail banking work centres on modernising technology infrastructure while maintaining security, compliance, and stable customer services. They have also worked on banking platforms, mobile applications, cloud adoption, and changes intended to improve scalability.
Scott Logic does not position the same product as an answer to every banking problem. Its work begins with the systems, risks and operational limits already present inside the organisation. Their teams can advise on technology strategy, design customer journeys, build software, improve cloud architecture, and connect data across platforms. They also help banks assess operational resilience and plan changes in stages, which is useful where older systems cannot simply be replaced at once.
Key Highlights:
- Operates from offices across the UK
- Has a clear focus on retail and investment banking
- Works with complex and regulated software environments
- Supports phased technology modernisation
- Combines consulting, design, engineering, data, and cloud work
Services:
- Banking software engineering
- Mobile banking application development
- Cloud modernisation
- Platform architecture and scalability
- Legacy system modernisation
- Technology strategy
- Data and analytics
- System integration
- Customer experience and product design
- Operational resilience assessment
Contact Information:
- Website: www.scottlogic.com
- E-mail: [email protected]
- LinkedIn: www.linkedin.com/company/scott-logic-limited
- Address: Office 0109, Cannon Green, 27 Bush Lane, London, EC4R 0AN
- Phone: +44 20 3787 4085
Conclusion
Banking software projects tend to become complicated in places that are easy to underestimate. A customer portal may look straightforward at first, but the work behind it can involve legacy databases, payment systems, identity checks, audit records, security controls, and strict rules around customer data. No single company on the list covers this work in quite the same way. Some are set up to deliver a complete banking platform; others make more sense for a mobile product, a difficult integration, a staged modernisation programme or an internal team that simply needs more engineering capacity.
A long list of services is not especially helpful if the provider has never dealt with the kind of system a bank needs to change. Banks should look closely at relevant project experience, security practices, regulatory knowledge, integration skills, and the way each company handles software after launch. A clear discovery stage is useful here. It gives both sides a chance to uncover technical limits and compliance risks before they become expensive problems halfway through development.