Payment infrastructure powers the movement of money between customers, merchants, banks, and digital platforms. Modern providers cover far more than checkout, with services ranging from issuing and acquiring to cross-border transfers, reconciliation, and fraud controls. APIs and payment orchestration are also changing how businesses connect multiple providers and expand into new markets. The right technology depends on whether an organization needs ready-made payment rails, a programmable platform, or engineers to build and integrate financial workflows.
1. Itexus
Itexus develops custom financial software for companies building payment products, digital banking platforms, and transaction-heavy business systems. Its fintech engineering work covers payment gateway integration, payment processing workflows, billing and invoicing, and connections to financial data providers. The company works across product discovery, user experience, development, testing, and ongoing modernization.
One published project involved an autonomous B2B billing and payments platform that connected payment collection with customer verification, accounting software, and bank data. Integrations included Dwolla for ACH payments, Payroc for card transactions, Plaid, QuickBooks, and Xero. That experience is relevant to businesses that need payment infrastructure woven into a custom product rather than simply adding a standard checkout.
Key Facts
- Best for: Custom fintech products and complex payment integrations
- Core services: Payment infrastructure, fintech software development, payment API integration, product engineering
- Notable projects: B2B billing, ACH and card payment integrations, accounting synchronization
- Engagement model: Custom software projects and dedicated engineering teams
- 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, United States
- LinkedIn: www.linkedin.com/company/itexus
- Facebook: www.facebook.com/itexus
- Twitter: x.com/ItexusSoft
- Instagram: www.instagram.com/itexus.soft
2. Primer
Primer provides a unified payments infrastructure layer that sits on top of a merchant's existing processors. Through one integration, teams get a localized checkout, a centralized vault for payment credentials, and no-code Workflows for building payment flows. Optimization tools include network tokenization, fallbacks that route a failed transaction to a secondary processor, and 3D Secure shown only when it is needed.
On the operations side, Primer adds observability across the payment stack, cross-provider monitors, reconciliation, and a cost overview for benchmarking providers. Published case studies include GetYourGuide, Printify, Lime and Maisons du Monde. It suits merchants that already work with several processors and want routing and reporting in one place.
Key Facts
- Best for: Merchants running several payment processors
- Core services: Checkout, vault, routing, fallbacks, reconciliation, observability
- Specialization: Payment orchestration across multiple providers
- Headquarters: London, UK
- Founded: 2020
- Team size: 51–200 employees
Contact Information
- Website: primer.io
- LinkedIn: www.linkedin.com/company/primerapi
3. Modern Treasury
Modern Treasury is a multi-rail payment service provider that lets businesses onboard customers, open accounts and move money through one API. Its Payments product covers ACH, RTP, FedNow, wires, checks and push-to-card, alongside stablecoin transfers. KYC, KYB and screening run through a legal entities API, and a real-time ledger tracks accounts and sub-accounts.
Operational tooling includes webhooks, returns handling, reconciliation and reporting. Solutions are packaged for embedded payments, lending, payroll, rewards and programmatic sub-accounts. It fits US companies whose product depends on moving money between bank accounts and keeping an accurate ledger of it.
Key Facts
- Best for: Platforms moving money across US bank rails
- Core services: Payments API, ledgers, stablecoins, onboarding, reconciliation
- Specialization: ACH, RTP, FedNow, wire and stablecoin money movement
- Headquarters: San Francisco, CA, USA
- Founded: 2018
- Team size: 51–200 employees
Contact Information
- Website: moderntreasury.com
- LinkedIn: www.linkedin.com/company/Modern-Treasury
4. Finix
Finix offers payment processing infrastructure for merchants and for software platforms that want to embed payments. A single platform accepts payments online, in person, by phone and through payment links, with billing for invoices, subscriptions and usage-based charges. Payouts send money to bank accounts or cards, and reporting brings sales, fees and settlements together.
For PayFacs, SaaS platforms and marketplaces, Finix adds merchant underwriting with automated onboarding workflows, compliance forms, terminals and Tap to Pay on iPhone, covering the US and Canada. Published case studies include Contractor Plus and Beyond Pricing. It suits vertical software companies that want to own the payments experience inside their product.
Key Facts
- Best for: SaaS platforms, marketplaces and PayFacs embedding payments
- Core services: Payment acceptance, payouts, billing, merchant underwriting, terminals
- Specialization: Embedded payments in the US and Canada
- Headquarters: San Francisco, CA, USA
- Founded: 2015
- Team size: 51–200 employees
Contact Information
- Website: finix.com
- Phone: (866) 821-5068
- LinkedIn: www.linkedin.com/company/finix-payments
5. Stripe
Stripe provides programmable financial infrastructure for online commerce. Its Payments product covers transaction acceptance, payment methods, and optimization, while Stripe Billing supports recurring revenue and invoicing. Developers can work with APIs and prebuilt interfaces to connect checkout experiences to existing applications.
Stripe Connect adds tools for marketplaces and platforms, including onboarding connected accounts and managing money movement between participating businesses. The broader product portfolio also includes fraud management through Radar, in-person payment technology through Terminal, and financial reporting. Businesses building a platform with multiple sellers or complex subscription revenue often find its unified developer ecosystem especially relevant.
Key Facts
- Best for: Online businesses, SaaS companies, and marketplaces
- Products: Payments, Connect, Billing, Radar, Terminal
- Infrastructure focus: Payment acceptance, platform payouts, recurring revenue
- Headquarters: South San Francisco, CA, USA
- Founded: 2010
- Team size: 5,001–10,000 employees
Contact Information
- Website: stripe.com
- Phone: +1 888 926 2289
6. Adyen
Adyen combines payment gateway technology, processing, and acquiring in a single financial technology platform. The company supports payments made online, in applications, and at physical points of sale. Its infrastructure gives merchants access to local payment methods and tools for managing payment performance across channels.
The platform also supports payments for businesses operating marketplaces and other embedded-finance models. A retailer with stores, an ecommerce operation, and international customers can manage these activities through a common payments environment. Adyen's direct acquiring model and unified commerce capabilities are particularly relevant to organizations coordinating large-scale, multichannel transactions.
Key Facts
- Best for: Enterprise merchants and global multichannel commerce
- Core services: Payment processing, acquiring, point-of-sale payments, platform payments
- Infrastructure focus: Unified online and in-person transaction processing
- Market coverage: International merchant payments
- Headquarters: Amsterdam, Netherlands
- Founded: 2006
- Team size: 1,001–5,000 employees
Contact Information
- Website: www.adyen.com
- Address: Simon Carmiggeltstraat 6-50, 1011 DJ, Netherlands
- LinkedIn: www.linkedin.com/company/adyen
- Facebook: www.facebook.com/AdyenPayments
- Twitter: x.com/Adyen
7. OSKI Solutions
OSKI Solutions builds and supports custom business software, including financial technology systems that need dependable integrations and maintainable backend architecture. Its engineering capabilities cover web applications, cloud infrastructure, systems integration, and development work suited to payment-enabled platforms. The team also works with .NET and modern frontend technologies.
Payment infrastructure rarely operates on its own. It exchanges data with customer accounts, internal operations, financial records, and external providers. OSKI Solutions brings software delivery and managed technology support into these connected environments, making it relevant to companies developing financial applications, integrating payment workflows, or modernizing supporting systems.
Key Facts
- Best for: Custom fintech applications and connected business systems
- Core services: Custom software development, integrations, cloud engineering, IT support
- Specialization: .NET development, web platforms, backend systems
- Relevant industry: Financial technology
- Headquarters: Tallinn, Estonia
- Team size: 51–200 employees
Contact Information
- Website: oski.site
- Email: etis.ikso@tcatnoc
- Address: Kaupmehe tn 7-120, Tallinn, 10114, Estonia
- LinkedIn: www.linkedin.com/company/oski-solutions
8. Marqeta
Marqeta operates a modern card issuing platform that gives businesses tools to launch and manage payment card programs. Its services include issuer processing, virtual and physical cards, tokenization, and controls over when, where, and how cards may be used. These capabilities are particularly useful when a product requires a programmable card experience.
Financial technology companies can build applications that connect card spending to account rules, business workflows, and real-time authorization decisions. Commercial expense products, digital banking experiences, and embedded payment programs are examples of the infrastructure needs Marqeta addresses. Its emphasis is on the issuing side of the payments system rather than conventional merchant checkout.
Key Facts
- Best for: Fintechs, digital banks, and commercial card programs
- Core services: Card issuing infrastructure, issuer processing, tokenization
- Infrastructure focus: Programmable cards and transaction controls
- Use cases: Virtual cards, embedded finance, commercial spending
- Headquarters: Oakland, CA, USA
- Founded: 2010
- Team size: 501–1,000 employees
Contact Information
- Website: www.marqeta.com
- Email: moc.ateqram@seciton
9. Checkout.com
Checkout.com provides payment processing infrastructure for digital businesses that operate across regions and payment methods. Its offering brings together online payment acceptance, local payment options, authorization optimization, and tools to manage transaction performance. Businesses integrate these services into websites, applications, and established commerce systems.
The company also supports fraud and risk management and broader money movement requirements. That combination appeals to merchants for whom payment approval rates, cross-border expansion, and operational insight have a measurable impact on revenue. Its modular approach allows teams to work on specific parts of the payments lifecycle while managing payments through a connected platform.
Key Facts
- Best for: Digital merchants with international transaction volumes
- Core services: Payment processing, payment methods, fraud management
- Infrastructure focus: Online acceptance and payment performance
- Use cases: Cross-border ecommerce and digital services
- Headquarters: London, UK
- Founded: 2012
- Team size: 1,001–5,000 employees
Contact Information
- Website: www.checkout.com
- Email: moc.tuokcehc@troppus
- Address: Wenlock Works, Shepherdess Walk, London, N1 7BQ, United Kingdom
- LinkedIn: www.linkedin.com/company/checkout
- Facebook: www.facebook.com/checkout
- Twitter: x.com/checkout
- Instagram: www.instagram.com/checkout_com
10. A-listware
A-listware supplies software engineering teams for companies developing complex business applications, with financial technology and payments among its covered areas. Its services span custom software development, team augmentation, application modernization, and quality assurance. Projects involving payment-enabled software benefit from engineering support across the surrounding application, not only the payment connection.
The company works with web and mobile development, backend services, and systems integration. Its published fintech material discusses digital payments, banking applications, and related functionality such as transactions and transfers. A-listware is a practical option for businesses extending a financial product team or building software that needs to exchange information reliably with external payment services.
Key Facts
- Best for: Engineering team extension for fintech products
- Core services: Custom development, staff augmentation, QA, maintenance
- Specialization: Web and mobile applications, payment integrations
- Industries: Fintech and other business software sectors
- Headquarters: London, UK
Contact Information
- Website: a-listware.com
- Phone: +1 (888) 337 93 73
- Email: moc.erawtsil-a@ofni
- Address: North Bergen, NJ 07047, USA
- LinkedIn: www.linkedin.com/company/a-listware
- Facebook: www.facebook.com/alistware
11. Airwallex
Airwallex provides a global financial platform that connects payment acceptance with cross-border financial operations. Businesses can use its infrastructure to collect payments, manage multi-currency funds, make transfers, and handle international payouts. The platform is designed around the practical challenges of operating across currencies and markets.
Airwallex also offers APIs and embedded financial products for companies that want to integrate financial workflows directly into their own services. This combination of merchant payments, foreign exchange, and global accounts makes it relevant to businesses managing both customer-facing transactions and the movement of funds behind them. International ecommerce and software platforms are natural use cases.
Key Facts
- Best for: International businesses and embedded-finance platforms
- Core services: Global payments, accounts, transfers, foreign exchange
- Infrastructure focus: Cross-border collections and payouts
- Engagement model: Financial APIs and business platform
- Headquarters: Singapore
- Founded: 2015
- Team size: 1,001–5,000 employees
Contact Information
- Website: www.airwallex.com
- Phone: +601 6299 5337
- Address: Level 7/15 William St. Melbourne, VIC 3000, Australia
- LinkedIn: www.linkedin.com/company/airwallex
- Facebook: www.facebook.com/airwallex
- Twitter: x.com/airwallex
- Instagram: www.instagram.com/airwallex
12. Rapyd
Rapyd offers financial technology infrastructure for businesses that need to collect, hold, and move money across markets. Its payment processing capabilities cover international merchant acceptance and access to locally relevant ways to pay. The company's broader platform also addresses payouts and financial operations across borders.
For digital businesses serving customers in multiple countries, differences in payment preferences and local financial networks create integration complexity. Rapyd brings these activities into an API-oriented infrastructure layer, helping platforms connect payment collection with the later stages of money movement. It is particularly relevant to businesses with geographically diverse payment and payout requirements.
Key Facts
- Best for: Cross-border digital businesses and payment platforms
- Core services: Payment processing, local payment methods, global payouts
- Infrastructure focus: International payment collection and disbursement
- Integration model: Financial technology APIs
- Headquarters: London, UK
- Founded: 2016
- Team size: 501–1,000 employees
Contact Information
- Website: www.rapyd.net
- Phone: +1 209-638-4373
- Email: ten.dypaR@sserP
- Address: 237 S Dixie Hwy, Coral Gables, FL 33133, Miami, USA
- LinkedIn: www.linkedin.com/company/rapydpayments
- Facebook: www.facebook.com/rapydpayments
- Twitter: x.com/RapydGlobal
- Instagram: www.instagram.com/wearerapyd
13. Spreedly
Spreedly provides payment orchestration technology that connects merchants to payment services across a diversified ecosystem. Its platform includes payment vaulting and tokenization, gateway connectivity, and tools for managing transaction routing. Instead of building each processor relationship as an isolated technical project, businesses can manage connections through a common integration layer.
The platform's product areas include Connect, Vault, Optimize, Protect, and Resolve. These functions support payment method portability, the selection of transaction paths, risk-related controls, and handling payment issues. Spreedly is particularly relevant to merchants or software platforms working with more than one payment service provider, where maintaining flexibility becomes a long-term architectural concern.
Key Facts
- Best for: Merchants and platforms using multiple payment providers
- Core services: Payment orchestration, token vault, gateway connectivity
- Infrastructure focus: Routing, portability, payment optimization
- Platform areas: Connect, Vault, Optimize, Protect, Resolve
- Headquarters: Durham, NC, USA
- Founded: 2007
- Team size: 51–200 employees
Contact Information
- Website: www.spreedly.com
- Phone: +1 888-727-7750
- Email: moc.yldeerps@ofni
- Address: 300 Morris St STE 400, Durham, NC 27701, USA
- LinkedIn: www.linkedin.com/company/spreedly
14. IXOPAY
IXOPAY offers payment orchestration technology for businesses operating across payment providers, regions, and currencies. The platform connects transaction routing, payment tokenization, and payment data management within a configurable infrastructure layer. Merchants can use these capabilities to coordinate complex payment arrangements without rebuilding the whole payment flow around each provider.
Features such as intelligent routing and reconciliation address practical needs beyond transaction acceptance. A company expanding into new regions or balancing different acquirers may need centralized rules, visibility, and payment method flexibility. IXOPAY focuses on these operational challenges, making it relevant to merchants seeking greater control over their payment stack.
Key Facts
- Best for: Businesses with multi-provider payment operations
- Core services: Payment orchestration, routing, tokenization, reconciliation
- Infrastructure focus: Centralized payment workflows and transaction data
- Use cases: Multi-acquirer and international payment operations
- Headquarters: Vienna, Austria
- Founded: 2014
- Team size: 51–200 employees
Contact Information
- Website: www.ixopay.com
- Phone: +1-855-949-6729
- Email: moc.yapoxi@selas
- Address: 333 E Main St #396, Lehi, Utah 84043, United States
- LinkedIn: www.linkedin.com/company/ixopay
- Facebook: www.facebook.com/ixopay
- Twitter: x.com/ixopay
15. Thredd
Thredd provides issuer processing technology for businesses running payment card programs. Its services connect card program managers, financial technology companies, and other issuers to the systems required to support debit, prepaid, and credit products. The platform includes transaction processing and controls used to manage card activity.
Card issuing presents different technical challenges from merchant acquiring. Programs need reliable authorization, card lifecycle management, security controls, and links to supporting banking infrastructure. Thredd addresses this part of the payment ecosystem, supporting businesses that want card functionality inside a digital financial product or commercial payment program.
Key Facts
- Best for: Digital card programs and embedded payment products
- Core services: Issuer processing and card program technology
- Infrastructure focus: Debit, prepaid, and credit card transactions
- Use cases: Fintech cards and business payment programs
- Headquarters: London, UK
- Founded: 2007
- Team size: 201–500 employees
Contact Information
- Website: www.thredd.ai
- Email: moc.dderht@CCO
- Address: 2nd Floor, 33 Kingsway, London WC2B 6UF, UK
- Twitter: x.com/HelloThredd
- LinkedIn: www.linkedin.com/company/thredd
- Instagram: www.instagram.com/HelloThredd
Comparison Table
| Company | Best for | Headquarters | Founded | Team size |
| Itexus | Custom fintech products and complex payment integrations | Dover, DE, USA | 2013 | 150+ engineers |
| Primer | Merchants running several payment processors | London, UK | 2020 | 51–200 employees |
| Modern Treasury | Platforms moving money across US bank rails | San Francisco, CA, USA | 2018 | 51–200 employees |
| Finix | SaaS platforms, marketplaces and PayFacs embedding payments | San Francisco, CA, USA | 2015 | 51–200 employees |
| Stripe | Online businesses, SaaS companies, and marketplaces | South San Francisco, CA, USA | 2010 | 5,001–10,000 employees |
| Adyen | Enterprise merchants and global multichannel commerce | Amsterdam, Netherlands | 2006 | 1,001–5,000 employees |
| OSKI Solutions | Custom fintech applications and connected business systems | Tallinn, Estonia | — | 51–200 employees |
| Marqeta | Fintechs, digital banks, and commercial card programs | Oakland, CA, USA | 2010 | 501–1,000 employees |
| Checkout.com | Digital merchants with international transaction volumes | London, UK | 2012 | 1,001–5,000 employees |
| A-listware | Engineering team extension for fintech products | London, UK | — | — |
| Airwallex | International businesses and embedded-finance platforms | Singapore | 2015 | 1,001–5,000 employees |
| Rapyd | Cross-border digital businesses and payment platforms | London, UK | 2016 | 501–1,000 employees |
| Spreedly | Merchants and platforms using multiple payment providers | Durham, NC, USA | 2007 | 51–200 employees |
| IXOPAY | Businesses with multi-provider payment operations | Vienna, Austria | 2014 | 51–200 employees |
| Thredd | Digital card programs and embedded payment products | London, UK | 2007 | 201–500 employees |
How to Choose a Payment Infrastructure Provider
Payment infrastructure choices are hard to reverse: once money flows, settlement, reconciliation and customer card data are tied to the provider. Start from the payment flows you need now and in the next two years, such as acquiring, payouts, issuing or cross-border transfers, then test each candidate against those flows.
Coverage of your payment flows. List the methods, currencies and countries you need, including local schemes such as SEPA Instant, Pix or UPI where relevant. Check whether the provider is a direct acquirer or licensed entity in each market or relies on partners. Indirect coverage often means slower settlement, extra fees and less control when a transaction fails.
Authorization and uptime record. Ask for authorization rates by region and card type for businesses similar to yours, and for the provider's historical uptime and incident reports. Check whether they support network tokens, account updater services and smart retries. A small improvement in approval rates often matters more than a difference in headline fees.
Total cost, not headline rate. Compare interchange-plus pricing against blended rates using your real transaction mix. Include currency conversion margins, chargeback fees, payout fees, minimums and reserve requirements. Ask how often pricing is reviewed and what triggers a change. A low advertised rate with a rolling reserve can tie up more cash than a higher rate without one.
Reconciliation and reporting. Finance teams spend a lot of time matching settlements to orders. Ask for sample settlement files and API reports, and check that fees, refunds, chargebacks and currency conversions appear at transaction level. Look for webhooks for every state change and identifiers that carry through from authorization to payout.
Compliance and risk controls. Confirm PCI DSS Level 1 status, support for 3-D Secure 2 and strong customer authentication where it applies, and the licences the provider holds in your markets. Ask how fraud screening is configured, whether you can set your own rules, and how much control you have over disputes. Opaque risk decisions can freeze accounts without warning.
Portability and orchestration. Ask whether card tokens can be exported to another processor and on what terms. If you plan to use several providers for redundancy or local coverage, check support for orchestration layers or vault-agnostic tokenization. Lock-in through non-portable tokens is one of the most common reasons switching providers becomes slow and costly.
Conclusion
Payment infrastructure decisions increasingly shape how quickly a business can launch new products, enter markets, and adapt to changing customer preferences. Direct processors, issuing platforms, orchestration providers, and software engineering partners solve different parts of the same transaction lifecycle. Buyers should look beyond headline transaction fees to understand integration effort, settlement flows, reliability, data access, and operational responsibilities. The ability to manage multiple payment methods and providers without excessive technical complexity is becoming a meaningful advantage. Clear ownership of security, compliance, reconciliation, and support remains essential as transaction volumes grow.
Frequently Asked Questions
What is payment infrastructure?
Payment infrastructure is the set of systems that moves money between payers, merchants, banks and platforms. It includes gateways, acquiring and issuing processors, card networks, account-to-account rails, payout systems, fraud tools and reconciliation services. A business usually connects to it through one or more providers rather than building direct links to banks and networks.
Should we build our own payment infrastructure or use a provider?
Most businesses should use providers for regulated processing and build their own layer on top, such as routing logic, ledgers and reporting. Building core processing yourself requires licences, PCI DSS scope, bank partnerships and dedicated risk staff. It tends to make sense only at very high volumes or when payments are the product itself.
How are payment infrastructure fees structured?
Card processing is typically priced as interchange-plus, where you pay the card network and issuer costs plus a provider markup, or as a blended flat rate. Additional fees often apply for currency conversion, payouts, chargebacks, refunds and monthly minimums. Account-to-account and local payment methods usually have different, often lower, pricing than cards.
What is payment orchestration and do we need it?
Payment orchestration is a layer that connects several processors and payment methods through one integration and routes each transaction by rules such as cost, approval rate or region. It is useful when you operate in many markets, need failover between providers or want to negotiate pricing. Single-market businesses with one processor often do not need it yet.
How long does integrating a payment provider take?
A standard hosted checkout can go live in days to a few weeks. A full API integration with saved cards, subscriptions, payouts and reconciliation typically takes several weeks to a few months. Onboarding and underwriting can add time, especially for high-risk sectors, marketplaces that pay out to third parties, or businesses entering new regulated markets.