TechRadiant ranks the top payment gateway and payment processing development companies in 2026, evaluated on payments domain depth, PCI DSS and security maturity, card scheme and PSP integrations, uptime at real transaction volume, and measured outcomes for named banks, processors and PSPs.
Payments is the largest segment in fintech and the least forgiving. A gateway that drops one transaction in a million still fails thousands of customers a day at scale. The companies below range from engineering firms trusted by most of the world's largest payment companies to specialists that build the real-time rails banks run on, and white-label gateways a PSP can launch under its own brand.
How TechRadiant ranks payments development companies: Each company is scored on five criteria, payments domain depth, PCI DSS and security, scheme and PSP integrations, scale and uptime, and client outcomes, using named client work, PSP and bank partnerships, published volumes and certifications. Facts are taken from each company's own site, case studies and public announcements, verified in October 2026. Scores are TechRadiant's editorial assessment. Rankings reviewed quarterly.
Most businesses should integrate an existing payment provider. The companies in this report earn their fee when you are the provider, or when payments are so central to your margin that renting them no longer makes sense.
Match a partner's track record to the specific build you need. A firm with excellent card-acquiring experience is not automatically ready for a real-time rail, and the reverse is also true.
Endava has more than 20 years in payments, and the scale of its client base is unmatched in this report: it says 90% of the largest payment companies and 70% of the largest acquirers rely on it. In 2026 it formed a strategic partnership with Tyl by NatWest, combining its AI-native delivery model with its Payments Gateway Accelerator to speed up Tyl's merchant payments offering, and it began co-developing next-generation payment and commerce solutions with Mastercard. Anonymous case studies include modernizing a global B2B payments company's core processing platform on cloud, and helping a leading payments provider launch products four times faster.
Icon Solutions has spent more than 16 years designing and delivering instant and real-time payment systems, including SEPA Instant, UK Faster Payments and Singapore's G3 Fast. Its Icon Payments Framework, introduced in 2016, lets banks build their own payment processing engines, and Icon says it sits at the core of payments architecture at Citi, UBS, NatWest and BNP Paribas. NatWest uses IPF for a SEPA-compatible processing engine aligned with ISO 20022 and the UK's New Payments Architecture. Icon reports builds up to four times faster, up to 50% lower total cost of ownership and 99.9999% uptime. UBS led its latest funding round in 2025, joined by Citi and NatWest.
Mindgate Solutions builds the switching and processing infrastructure behind India's real-time payments, and it now works with more than 60 banks worldwide. Its platforms process more than 8 billion transactions a month at peaks above 20,000 transactions per second, and power more than 10 million merchants. In September 2026 it deployed next-generation UPI infrastructure for J.P. Morgan Payments' corporate and merchant clients in India, extending an existing IMPS engagement. Its product range spans UPI, cross-border real-time payment adapters, CBDC platforms, merchant acquiring and transaction banking. PayU took a 70% controlling stake in July 2026, after earlier investment from ACI Worldwide.
SPD Technology has 20 years of software delivery, and payments is its clearest specialty. It is an Adyen Implementation Partner, a formal programme that vets integration quality, and its service list covers payment orchestration, PayFac platforms, gateways, POS software, merchant onboarding and billing. For Pie Insurance it modernized billing and expanded payment processing, contributing to 3x growth in the payment user base and 40% operational time saved. It built custom fraud detection for Poynt, an omnicommerce platform handling more than 140 million transactions a month, and works with UK online payment provider Axcess Payment Services.
Kindgeek has worked only on fintech for more than 11 years, and payments is the heart of its portfolio: platforms it has built have processed more than €10 billion. It holds ISO 27001:2023 and ISO 9001:2015 certification and builds to PCI DSS, GDPR and PSD3 requirements. For Decta, the UK payments company, it built an all-in-one self-service platform for small and medium merchants, and for payabl. in Cyprus it built a full payment processing product ecosystem. Its white-label modules cover core payments, acquiring and invoicing, and it also offers dedicated teams for payment institutions and EMIs.
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Akurateco takes a different route from the engineering firms in this report: it provides a fully brandable, PCI DSS-certified payment gateway and orchestration platform that PSPs, acquirers and payment facilitators launch as their own. Its team brings more than 15 years of online payments experience, the platform offers more than 700 ready-made connections to banks and payment methods, and it passed €1 billion in processed volume over 12 months by March 2024. It does not touch the money flow itself, so clients keep their own licences and acquiring relationships. Named clients include TESS Payments, MontyPay, DineroPay, Platon, CPS and Simply.
Ciklum's payments work is defined by scale and uptime. For an unnamed payment gateway, it scaled open banking payments across 16 EU markets at 99.8% uptime with a 9 out of 10 customer rating. Its payments and banking client list includes Payoneer, Paysafe, Mastercard, Stripe and createpay, and for Inspira it cut costs by 25% and made transactions 40% faster through banking automation. Ciklum typically works as embedded engineering capacity inside a client's own teams, as it does with 14 teams on eToro's trading platform, which suits payment companies that want to scale engineering without handing over product ownership.
IntellectEU focuses on the messaging layer that moves high-value and cross-border payments. It has 18 years of Swift systems integration experience and offers Swift connectivity products, Swift customer security programme support, ISO 20022 migration and AI-powered address structuring for ISO 20022-ready payments. Its team of 250+ works across seven offices and reports more than 3,000 projects delivered in 30+ countries. Organisations listed on its site as trusting its work include Euroclear, Isabel Group, ASX and S&P Dow Jones. It suits banks and corporates that need specialist help with Swift and structured payment data rather than a full gateway build.
N-iX brings 24 years of delivery and ISO 27001 and ISO 9001:2015 certification, plus PSI and FSQS-NL credentials that European financial institutions use to vet suppliers. Its best-known payments engagement is with Currencycloud, the cross-border payments business, where platforms it supports process $400 million in account balances every month. It also lists Credit Agricole and Raisin among its banking and fintech clients. With engineering centers across Poland, Ukraine, Bulgaria, Romania, Colombia and India, N-iX suits payment companies that need certified, scalable nearshore teams for platform, data and cloud work alongside an in-house payments team.
Itexus has built fintech software for 13+ years, and its flagship payments case is a PCI DSS-compliant digital wallet and payments ecosystem for Coinstar, the $2.2 billion global fintech company. Its payments integration list is specific, covering Stripe, Adyen, PayPal and Plaid alongside core banking platforms such as FIS and Fiserv, and it builds e-wallets, banking-as-a-service products and digital lending flows. Itexus is also one of few firms in this category to publish budget guidance: discovery from around $30,000, and enterprise projects from $150,000 to over $1 million. Its controls are described as aligned with SOC 2 and ISO 27001 rather than certified.
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Answers to the questions PSPs, banks and platforms ask most often when choosing a payments engineering partner in 2026.
Most merchants and platforms should integrate an existing payment service provider. It is faster, and most of the PCI DSS burden stays with the provider.
Building or owning the payments layer makes sense when payments are your product or a major part of your margin: you are a PSP, acquirer, bank or PayFac, you process enough volume that per-transaction fees outweigh build and running costs, or you need routing, pricing and risk controls a provider will not give you.
Many companies take a middle path, starting from a white-label gateway or payments framework and building only what differentiates them.
PCI DSS v4.0.1 is the active version of the card industry's security standard after v4.0 was retired, and the requirements that were future-dated in v4.0 are now mandatory. Any system that stores, processes or transmits card data must meet it.
For a build, three questions matter most:
A white-label gateway that is already PCI DSS certified, such as Akurateco's, can reduce the work, but your own environment still needs to be assessed.
Payment orchestration is a layer that sits between your checkout and multiple payment providers. It routes each transaction to the provider most likely to approve it at the lowest cost, retries failed payments through another route and fails over when a provider goes down.
It is worth it once you work with more than one acquirer or PSP, sell across several countries, or lose meaningful revenue to declines. It is usually not worth it for a single-market business on one provider.
Ask any partner for approval-rate and cost results from a previous orchestration build, not just a feature list.
A payment facilitator (PayFac) is a business, often a software platform, that onboards its own sub-merchants under a master merchant account with a sponsoring acquirer, then manages their payments and payouts.
The software work goes well beyond checkout. It includes merchant onboarding and underwriting, KYC and KYB checks, risk monitoring, split payments and payouts, chargeback handling and the reporting your sponsoring acquirer will require. SPD Technology, for example, lists PayFac platform development and merchant onboarding among its core payments services.
Before building, confirm the obligations your sponsor will place on you, because they shape much of the architecture.
Real-time rails settle payments in seconds, at any time of day, with no batch window to fix problems overnight. That changes the engineering in three ways: systems must be always available, fraud checks must run within the payment's time limit, and liquidity and reconciliation must update continuously.
Specialists in this report have built these rails at very large scale. Mindgate's platforms process more than 8 billion transactions a month for 60+ banks, and Icon Solutions' framework runs instant payments at Citi, UBS, NatWest and BNP Paribas, with 99.9999% uptime reported.
Ask partners for peak transactions per second and uptime on live systems they built.
Yes. ISO 20022 is now the standard message format for high-value and cross-border payments, and its richer, structured data is becoming the baseline banks and corporates are expected to send and receive.
The work has shifted from migration deadlines to using the data well: mapping legacy formats, structuring names and addresses correctly, improving sanctions screening and reconciliation, and feeding analytics.
Specialists such as IntellectEU focus on this layer, including Swift connectivity and AI-assisted address structuring for ISO 20022-ready payments.
It depends mostly on how much you reuse. A gateway built from scratch, including scheme certification and PCI DSS assessment, is a substantial programme. Starting from an existing framework or white-label platform shortens it considerably.
Icon Solutions reports that its payments framework lets banks build platforms up to four times faster. Endava used its Payments Gateway Accelerator to speed up Tyl by NatWest's merchant payments roadmap. White-label gateways such as Akurateco's are designed for PSPs to launch under their own brand rather than build the core.
Plan time for certification, acquirer onboarding and security testing alongside the engineering. These steps often set the real launch date.
These six questions separate genuine payments specialists from general developers:
The answers usually narrow a long list to two or three serious options.
Human-verified rankings across AI, development, and marketing — updated quarterly.
