US banks and credit unions are modernizing digital channels, lending workflows and core system integrations to keep up with customer expectations and regulatory demands. Off-the-shelf banking platforms cover many standard needs, but most institutions still require custom applications, integrations with cores such as Fiserv, FIS or Jack Henry, and secure data flows between systems. The companies in this list are software partners that build and modernize banking software for US financial institutions, from mobile banking apps to lending and compliance tools.
1. Itexus
Itexus develops custom financial software for banks, credit unions, fintech companies, and businesses introducing new financial products. Its work covers digital and mobile banking, payments, lending applications, wealth management software, and integrations between customer-facing products and existing banking systems. The company also handles modernization projects in which security, sensitive data, and established operational processes have to remain central to the design.
For US banking teams building a differentiated product rather than licensing an entire platform, Itexus offers product engineering across discovery, interface design, development, testing, and ongoing improvement. That scope is relevant when a bank needs an onboarding journey, a new digital channel, or an integration around its existing core.
Key Facts
- Best for: Custom digital banking applications and fintech product engineering
- Core services: Banking software development, digital banking apps, core banking integration
- Specialization: Mobile banking, customer onboarding, modernization
- Service area: Delaware
- Headquarters: Dover, DE, USA
- Founded: 2013
- Team size: 150+ engineers
Contact Information
- Website: itexus.com
- Email: moc.suxeti@ofni
- Address: 8, The Green, STE road, Dover, DE 19901
- Facebook: www.facebook.com/itexus
- Instagram: www.instagram.com/itexus.soft
- LinkedIn: www.linkedin.com/company/itexus-fintech-software
- Twitter: x.com/ItexusSoft
2. Jack Henry
Jack Henry builds core, digital banking and payments software for banks, credit unions, de novo banks and fintechs. Its catalog covers core platforms, branch and ATM operations, lending and deposit servicing, cybersecurity, and fraud tools, so an institution can run most of its technology through one provider.
Named products include the Banno digital banking platform, the Payrailz payments platform, Jack Henry Rapid Transfers, and Financial Crimes Defender for fraud work. Developers integrate with its systems through jXchange, SymXchange and the Banno Digital Toolkit. It suits community banks and credit unions that want core processing, digital channels and payments from one vendor.
Key Facts
- Best for: Community banks and credit unions needing core and digital banking
- Core services: Core platforms, digital banking, payments, fraud prevention, cybersecurity
- Specialization: Integrated banking technology for US banks and credit unions
- Headquarters: Monett, MO, USA
- Founded: 1976
- Team size: 5,001–10,000 employees
Contact Information
- Website: jackhenry.com
- LinkedIn: www.linkedin.com/company/6970
3. Q2
Q2 provides a digital banking platform for consumer, small business and commercial banking, used by banks and credit unions. Around the platform it offers digital account opening, treasury fulfillment, money movement, data-driven marketing, and risk and fraud tools such as account takeover protection, positive pay and dispute management.
It fits institutions that want to modernize online and mobile banking while keeping onboarding, fraud controls and pricing on one platform.
Key Facts
- Best for: Banks and credit unions modernizing consumer and commercial digital banking
- Core services: Digital banking, account opening, fraud management, relationship pricing, embedded finance
- Specialization: Digital banking platforms for US financial institutions
- Headquarters: Austin, TX, USA
- Founded: 2004
- Team size: 1,001–5,000 employees
Contact Information
- Website: q2.com
- Phone: 1-833-444-3469
- LinkedIn: www.linkedin.com/company/q2software/
4. ScienceSoft
ScienceSoft provides financial software development and IT consulting for institutions handling sensitive data and regulated processes. Its banking-related capabilities span custom applications, financial system integration, modernization, data analytics, and cybersecurity. The company has worked in financial IT since 2005 and operates from McKinney, Texas, with another US office in Atlanta.
For banks improving existing systems, ScienceSoft brings software architecture, delivery, testing, and compliance knowledge into the same engagement. Its financial sector work makes it relevant to payment and lending applications, reporting platforms, and operational workflows that must connect with established enterprise systems.
Key Facts
- Best for: Banking application modernization and regulated financial systems
- Core services: Custom financial software, IT consulting, system integration, cybersecurity
- Industries: Banking, insurance, investment and other financial services
- Service area: McKinney, Texas; Atlanta, Georgia
- Headquarters: McKinney, TX, USA
- Founded: 1989
- Team size: 501–1,000 employees
Contact Information
- Website: www.scnsoft.com
- Email: moc.tfosncs@tcatnoc
- Phone: +1 214 306 6837
- Address: 5900 S. Lake Forest Drive Suite 300, McKinney, Dallas area, TX 75070
- LinkedIn: www.linkedin.com/company/sciencesoft
- Facebook: www.facebook.com/sciencesoft.solutions
- Twitter: x.com/ScienceSoft
5. A-listware
A-listware provides software engineering, dedicated development teams, and technology services for businesses working with financial data and transactions. Its financial services work includes custom banking applications, fintech platforms, payment solutions, and modernization of legacy systems. The company combines implementation resources with broader staffing and engineering support for organizations maintaining products over multiple release cycles.
Banks with an internal architecture or product owner but insufficient development capacity may find its delivery approach useful. A-listware can contribute engineers to ongoing work involving interfaces, APIs, data handling, and applications around existing banking infrastructure. This makes the company relevant for targeted improvements as well as larger software development engagements.
Key Facts
- Best for: Dedicated engineering capacity for banking projects
- Core services: Custom software development, engineering teams, legacy modernization
- Industries: Financial services and other business sectors
- Service area: New Jersey
- Headquarters: London, UK
Contact Information
- Website: a-listware.com
- Email: moc.erawtsil-a@ofni
- Phone: +1 (888) 337 93 73
- Address: North Bergen, NJ 07047, USA
- Facebook: www.facebook.com/alistware
- LinkedIn: www.linkedin.com/company/a-listware
6. Velvetech
Velvetech is a US-based custom software development company with offices in the Miami and Chicago areas. Its work across financial technology includes application development, API integration, enterprise data platforms, and modernization. The company also has experience building lending and underwriting software that supports financial decision-making.
Banking organizations often need a new interface or workflow without replacing their underlying infrastructure. Velvetech's engineering services cover the APIs, mobile applications, backend processes, and integrations involved in this type of incremental development. It is particularly relevant when an institution needs a dedicated software delivery partner for a specific operational or customer-facing product.
Key Facts
- Best for: Fintech integrations and custom financial applications
- Core services: Software engineering, API integration, mobile development, modernization
- Financial project focus: Lending workflows and data-driven applications
- Service area: Sunny Isles Beach, Florida; Chicago, Illinois
- Founded: 2004
- Team size: 51–200 employees
Contact Information
- Website: velvetech.com
- Email: moc.hcetevlev@selas
- Phone: +1 (847) 559-0864
- Address: 5440 N. Cumberland Ave, Suite 150 Chicago, IL 60656, USA
- LinkedIn: www.linkedin.com/company/velvetech
- Instagram: www.instagram.com/velvetech
- Facebook: www.facebook.com/velvetech
- Twitter: x.com/velvetech
7. Chetu
Chetu develops banking software around the systems financial institutions already use. Its banking offering covers integrations with FIS, Fiserv, Jack Henry, and Temenos products, alongside custom APIs, reporting layers, and data services. It also works on ATM platforms, payment processing, mobile banking, and loan origination and servicing.
For US banks tied to a long-term core banking contract, the ability to extend an existing platform is often more practical than a complete replacement. Chetu supports this model by building middleware, digital channels, and operational tools that exchange information with established core software. The company is based in Florida and serves banks, credit unions, and lenders.
Key Facts
- Best for: Integrations and extensions around established banking cores
- Core services: Core banking integration, mobile banking, lending software, ACH and ATM tools
- Platforms referenced: FIS, Fiserv, Jack Henry, Temenos
- Service area: Sunrise, Florida
- Headquarters: Sunrise, FL, USA
- Founded: 2000
- Team size: 1,001–5,000 employees
Contact Information
- Website: www.chetu.com
- Email: moc.utehc@selas
- Phone: 954 342 5676
- Address: 1500 Concord Terrace, Suite 100, Sunrise FL, 33323
- LinkedIn: www.linkedin.com/company/chetu-inc-
- Facebook: www.facebook.com/ChetuInc
- Twitter: x.com/ChetuInc
8. SoftServe
SoftServe provides digital engineering, cloud modernization, data, and AI services to financial services organizations. Its banking and payments work emphasizes regulated workloads, operational modernization, and technology platforms that support analytics and automation. Financial-sector solutions include compliance-oriented workflows and cloud-based data infrastructure.
For banks managing complex technology estates, software work increasingly includes replacing outdated applications while keeping data and controls available. SoftServe combines enterprise delivery with cloud and AI engineering for these projects. Its US headquarters is in Austin, Texas, with additional offices across several states, supporting close coordination with American financial services clients.
Key Facts
- Best for: Enterprise banking modernization and cloud transformation
- Core services: Software engineering, cloud modernization, data platforms, AI solutions
- Industries: Banking, insurance, fintech and payments
- Service area: Austin, Texas, and other US offices
- Headquarters: Austin, TX, USA
- Founded: 1993
- Team size: 10,001+ employees
Contact Information
- Website: www.softserveinc.com
- Phone: +1-512-516-8880
- Address: 201 W 5th Street Suite 1550 Austin, TX 78701
- LinkedIn: www.linkedin.com/company/softserve
- Instagram: www.instagram.com/softserve_people
- Facebook: www.facebook.com/SoftServeCompany
- Twitter: x.com/SoftServeInc
9. DashDevs
DashDevs concentrates on banking and regulated fintech product development. Its services cover digital bank platforms, payment infrastructure, mobile banking, embedded finance, and lending products. The company also offers Fintech Core, a configurable layer for accounts, payments, customer management, controls, and reporting that connects with licensed banking and payment partners.
This combination of reusable fintech components and custom software engineering is relevant to banks and financial product teams seeking to launch new services without rebuilding every capability. DashDevs works on integrations, customer onboarding, transaction processing, and KYC and AML workflows. The company lists a US presence in Wilmington, Delaware.
Key Facts
- Best for: Digital banking products and regulated fintech launches
- Core services: Core banking development, mobile banking, payment systems, integrations
- Products: Fintech Core configurable financial infrastructure
- Service area: Wilmington, Delaware
- Headquarters: Wilmington, DE, USA
- Founded: 2011
- Team size: 51–200 employees
Contact Information
- Website: dashdevs.com
- Email: moc.svedhsad@ofni
- Address: 1007 North Orange Street, 4th Floor, Wilmington, DE 19801
- LinkedIn: www.linkedin.com/company/dashdevs
- Facebook: www.facebook.com/dashdevs
- Twitter: x.com/dashdevs
10. Itransition
Itransition builds software for retail, commercial, investment, and digital banking organizations. Its banking services include core processing applications, digital customer portals, mobile banking, CRM, investment management platforms, and reporting tools. Projects also cover integration, AI-enabled analytics, and automation of back-office activities.
Banks that operate several disconnected applications can use this breadth of engineering for both customer-facing improvements and internal process change. Itransition develops custom or platform-based systems and supports integration with existing infrastructure. Its published banking case studies include portal redevelopment and business intelligence work. The company maintains a US office in Decatur, Georgia.
Key Facts
- Best for: Banking portals, internal systems and cross-platform integration
- Core services: Core banking software, digital channels, CRM, automation, analytics
- Banking clients: Retail, commercial, investment and digital banks
- Service area: Decatur, Georgia
- Founded: 1998
- Team size: 1,001–5,000 employees
Contact Information
- Website: www.itransition.com
- Email: moc.noitisnarti@ofni
- Phone: +1 720 207 2820
- Address: 160 Clairemont Ave, Suite 200, Decatur, GA 30030
- LinkedIn: www.linkedin.com/company/itransition
- Facebook: www.facebook.com/Itransition
- Twitter: x.com/itransition
11. Tata Consultancy Services (TCS)
Tata Consultancy Services develops and implements enterprise banking technology, including its TCS BaNCS platform. BaNCS supports banking operations such as accounts, lending, payments, and digital services, and the company markets solutions to community and regional banks in the United States. Its broader engineering practice also supports integration and modernization work around complex financial systems.
This combination of software products and implementation services is relevant to institutions assessing more than a single customer-facing application. Banking transformations require technology configuration, data migration, testing, and sustained operational support. TCS can participate across those connected areas, particularly when the organization needs a long-term delivery partner for substantial change.
Key Facts
- Best for: Banking platform modernization and implementation
- Core services: TCS BaNCS, core banking, integration, software engineering
- US market: Community, regional, and other financial institutions
- Strength: Banking software backed by large-scale delivery services
- Headquarters: Mumbai, India
- Founded: 1968
- Team size: 10,001+ employees
Contact Information
- Website: www.tcs.com
- Email: moc.sct@gnitekram.an
- Phone: 678-388-3458
- Address: No. 400, Galleria Parkway, Suite 1060, GA 30339
- LinkedIn: www.linkedin.com/company/tata-consultancy-services
- Instagram: www.instagram.com/tcsglobal
- Facebook: www.facebook.com/TataConsultancyServices
- Twitter: x.com/TCS
12. Andersen
Andersen develops custom banking software for financial institutions that need new channels, integration infrastructure, or improvements to existing systems. Its portfolio covers online and mobile banking, core software engineering, lending applications, banking CRM, payments, and analytics. It also develops fraud monitoring and credit evaluation tools with data and AI technologies.
The company is relevant to banks undertaking projects that combine business workflows and technical modernization. Andersen addresses architecture, development, testing, deployment, and subsequent improvements, including connections between legacy banking components and newer customer services. Its financial software practice works across banking, fintech, insurance, and investment applications.
Key Facts
- Best for: Custom banking engineering and digital channel modernization
- Core services: Banking integration, mobile banking, core platforms, lending systems
- Specialization: APIs, data analytics, QA, compliance-oriented architecture
- Service area: US and international financial institutions
- Headquarters: Warsaw, Poland
- Founded: 2007
- Team size: 1,001–5,000 employees
Contact Information
- Website: andersenlab.com
- Email: moc.balnesredna@tcatnoc
- Phone: +1 469 902 4505
- Address: 7300 State Highway 121, Suite 300, Dallas, Texas, 75070, USA
- LinkedIn: www.linkedin.com/company/andersen-lab
- Instagram: www.instagram.com/andersen.global
- Facebook: www.facebook.com/AndersenSoftwareDev
- Twitter: x.com/AndersenLabs
13. Intellias
Intellias supports banks with core system transformation, payment processing software, API-first architecture, and digital channel engineering. Its banking work includes online and mobile apps, data platforms, regulatory technology, fraud detection, and financial analytics. The company serves retail, commercial, private, investment, and digital banking organizations.
The value of this scope is in connecting modernization with new product delivery. Financial institutions can engage Intellias for legacy infrastructure upgrades, open banking integrations, lending workflows, or customer experience improvements. Its US locations include Chicago, Illinois, and Novi in the Detroit area, providing an American base alongside its international engineering operations.
Key Facts
- Best for: Core banking transformation and modern digital services
- Core services: Digital banking, payment platforms, API integrations, analytics, RegTech
- Specialization: Cloud-native systems, open banking, AI-assisted operations
- Service area: Chicago, Illinois; Novi, Michigan
- Founded: 2002
- Team size: 1,001–5,000 employees
Contact Information
- Website: intellias.com
- Email: moc.sailletni@ofni
- Phone: +1 857 444 0442
- Address: 500 West Madison Street, Suite 1000, Chicago, IL 60661
- LinkedIn: www.linkedin.com/company/intellias
- Instagram: www.instagram.com/intellias_global
- Facebook: www.facebook.com/Intellias.GlobalPage
14. N-iX
N-iX delivers banking and financial services software engineering for institutions seeking to modernize platforms and build secure digital products. Its financial practice covers banking applications, payment integrations, lending systems, regulatory workflows, customer lifecycle management, and cybersecurity. The company has published work involving cloud transformation and financial platforms.
N-iX approaches banking modernization through software development, re-platforming, data services, cloud engineering, and security. These skills are useful to institutions connecting new channels to older systems or working to make operational data more accessible. The company has a US office in Plantation, Florida, and supports North American financial services clients through a broader international delivery network.
Key Facts
- Best for: Banking platform re-engineering and financial cloud projects
- Core services: Software engineering, lending and payment systems, data and cloud modernization
- Financial focus: Banking, capital markets and insurance
- Service area: Plantation, Florida
- Headquarters: Valletta, Malta
- Founded: 2002
- Team size: 1,001–5,000 employees
Contact Information
- Website: www.n-ix.com
- Email: moc.xi-n@tcatnoc
- Phone: +17273415669
- Address: 4330 W Broward Boulevard – Space P/Q, Plantation, FL 33317
- LinkedIn: www.linkedin.com/company/n-ix
- Facebook: www.facebook.com/N.iX.Company
- Twitter: x.com/N_iX_Global
Comparison Table
| Company | Best for | Headquarters | Founded | Team size |
| Itexus | Custom digital banking applications and fintech product engineering | Dover, DE, USA | 2013 | 150+ engineers |
| Jack Henry | Community banks and credit unions needing core and digital banking | Monett, MO, USA | 1976 | 5,001–10,000 employees |
| Q2 | Banks and credit unions modernizing consumer and commercial digital banking | Austin, TX, USA | 2004 | 1,001–5,000 employees |
| ScienceSoft | Banking application modernization and regulated financial systems | McKinney, TX, USA | 1989 | 501–1,000 employees |
| A-listware | Dedicated engineering capacity for banking projects | London, UK | — | — |
| Velvetech | Fintech integrations and custom financial applications | — | 2004 | 51–200 employees |
| Chetu | Integrations and extensions around established banking cores | Sunrise, FL, USA | 2000 | 1,001–5,000 employees |
| SoftServe | Enterprise banking modernization and cloud transformation | Austin, TX, USA | 1993 | 10,001+ employees |
| DashDevs | Digital banking products and regulated fintech launches | Wilmington, DE, USA | 2011 | 51–200 employees |
| Itransition | Banking portals, internal systems and cross-platform integration | — | 1998 | 1,001–5,000 employees |
| Tata Consultancy Services (TCS) | Banking platform modernization and implementation | Mumbai, India | 1968 | 10,001+ employees |
| Andersen | Custom banking engineering and digital channel modernization | Warsaw, Poland | 2007 | 1,001–5,000 employees |
| Intellias | Core banking transformation and modern digital services | — | 2002 | 1,001–5,000 employees |
| N-iX | Banking platform re-engineering and financial cloud projects | Valletta, Malta | 2002 | 1,001–5,000 employees |
How to Choose a Banking Software Company in the USA
US banks and credit unions rarely build in a vacuum. New software has to work with an existing core, pass vendor due diligence and satisfy examiners. When you compare development partners, focus on their experience with US cores and regulations, how they secure your data and how they support the product after launch.
Experience with your core provider. Ask for specific projects that integrated with Fiserv, FIS, Jack Henry or whichever core you run, and which interfaces they used. Core integrations often depend on vendor-specific APIs, partner programs and certification steps. A team that has done it before will estimate access timelines and data mapping realistically instead of discovering them mid-project.
US regulatory knowledge. Check that the team understands the rules your product touches: Reg E for electronic transfers, Reg Z and fair lending for credit, BSA/AML and KYC for onboarding, and GLBA for customer data privacy. Ask how they translate these into requirements, audit logs and disclosures. They do not replace your compliance team but should speak its language.
Security evidence for due diligence. Your vendor management team will ask for a SOC 2 Type II report, security policies, penetration test results and insurance details. Request these early. Also ask about secure development practices, access controls for developers working with production-like data, and whether any data or staff sit outside the US.
Legacy migration approach. If the project replaces or wraps an older system, ask how the partner handles data migration, parallel runs and rollback. Good answers include reconciliation checks, phased cut-overs and a plan for member or customer communication. Vague promises of a quick switch are a warning sign in banking, where errors show up in balances.
US presence and time-zone coverage. Find out where the delivery team works, who your day-to-day contacts are and how much overlap they have with your business hours. Some institutions require onshore staff for certain systems. Nearshore or offshore teams can work well, but confirm how communication, escalation and on-site visits are handled.
Support model after launch. Ask what happens after go-live: who monitors the system, how fast critical issues are fixed and how regular updates to cores, OS versions and regulations are handled. Review sample SLAs and maintenance pricing. Banking software needs ongoing care, and a partner focused only on delivery may leave you without support.
Conclusion
Banking software projects in the US succeed when technology, compliance and day-to-day operations are planned together. A strong partner should understand core banking integrations, security standards such as SOC 2 and PCI DSS, and the realities of migrating from legacy systems. When comparing banking software companies, review their financial-sector portfolio, US presence and support model after launch. The right choice will help an institution launch new digital products faster without compromising stability.
Frequently Asked Questions
How much does custom banking software cost in the US?
Costs vary with scope, integrations and team location. A focused tool or integration can be a modest project, while a full mobile banking or lending platform is a significant investment. Main drivers are the number of core and third-party integrations, compliance and security requirements, data migration, and whether you hire an onshore, nearshore or offshore team. Ask vendors for estimates broken down by phase.
Should a bank buy a banking platform or build custom software?
Buy when a proven platform covers your needs with acceptable configuration, since it is usually faster and comes with vendor support. Build when the product is a differentiator, when off-the-shelf tools do not fit your workflows, or when you need to connect several systems in a specific way. Many institutions combine both, customizing around a purchased platform.
What compliance requirements apply to banking software in the USA?
It depends on the product. Common ones include GLBA for privacy and data security, BSA/AML and KYC rules for onboarding, Reg E for electronic transfers, Reg Z and fair lending laws for credit, and PCI DSS for card data. Examiners also expect banks to manage vendor risk under interagency third-party guidance, so your development partner will go through due diligence.
How long does it take to build banking software?
A minimum viable product or single integration often takes a few months. Larger platforms such as a complete digital banking app or lending system usually take longer and are delivered in phases. Timelines depend heavily on core provider access, security reviews, compliance sign-off and testing with real data, which can add weeks outside the development work itself.
Can a non-US company build banking software for US institutions?
Yes, many US banks and credit unions work with nearshore or offshore development teams. What matters is that the partner can pass your vendor due diligence, protect data according to your policies and understand US regulations. Some institutions keep production access or certain roles onshore, so confirm early which work can be done from outside the US.