Secure & fast integrated payments

Experience payments designed to work seamlessly with your in-store, online and mobile platforms.

merchants header graphic

Get ready for secure payments
optimized for your industry.

Whether you accept payments in-person, online or via a mobile app, Cardknox provides you with one streamlined solution for the best in secure payments. Cardknox’s solution is designed with both customer and merchant in mind, and is the best solution for businesses and nonprofits alike. Enhance the customer experience, boost efficiency, and cut costs with a flexible and advanced secure payment solution.

Affordable pricing

A few lines of code can get your EMV solution up-and-running. A few more lines can get you customizations that you never dreamed of.

Great support

Gateway POS developers across all industries choose Cardknox for our versatile approach and unique set of features.

Security first

From PA-DSS compliance PCI compliance to P2PE exncyption and QIR sponsorship, Cardknox is the secure online payment gateway solution.

Increase your expectations

  • Recurring payments

    Allow users to choose installments by selecting frequency and length, and Cardknox will automatically charge the recurring payments at the scheduled time. There is no need to pre-create plans so you have complete flexibility. Learn More

  • Gift cards

    Process gift cards with ease with our powerful gift card solution. We can even seamlessly migrate gift cards from 3rd party platforms so that existing card balances will remain active.

  • Card updater

    Our card updater feature, in conjunction with tokenization, automatically keeps credit cards in our vault updated, so subsequent transactions are not declined.

  • Guaranteed yes/no fraud decisions

    Unlike other fraud tools that provide confusing scores, simple Yes/No decisions are given and all approvals are guaranteed.

  • Tokenization

    We have developed a true tokenization system that does not simply encrypt sensitive data, but assigns a unique ID for each transaction.

  • Intelligent routing

    Described by an industry leader as “magical,” we perform over a dozen checks and route the transaction accordingly.

e-commerce merchants

Custom e-commerce

Robust end-to-end e-commerce payments

Our full-stack API enables you to deeply integrate a custom payment flow and power next-generation payments.

online credit card payment system plugins

Plugins for popular shopping carts

Upgrade the payment experience

Our payment plugins provide the most secure transaction. Using proprietary iFields, sensitive card data completely bypass the host server, significantly reducing your PCI scope and liability.


internet payment gateway logo

Gateway emulation

It’s like a translator for payment commands.

Have an existing payment integration? Simply change the gateway URL to the Cardknox endpoint and get up and running fast.

Secure payment form


If you have a custom payment form on your website, replace the credit card fields with iFields and the sensitive card data will completely bypass your server, while still giving you full control over the user experience.

Learn more

Hosted payment forms (PaymentSITE)
Start accepting secure payments online without writing a line of code or dealing with security and hosting challenges. Cardknox hosted payment forms is the perfect solution for service companies and nonprofits to accept payments and donations by directing users to a secure form that can be customized for your needs. Cardknox PaymentSITE can also be embedded on your website and also supports pre-populating fields such as amount and invoice number by passing the amount via the URL. For power users, webhooks and redirect URLs can be setup for quick system integration.

View a demo PaymentSITE form
Learn More

Discover our secure and flexible payment solutions.

  • In-store payments

    Start taking EMV with our In-Store solution that is  fully customizable to each merchants unique needs.

  • Online payments

    Our e-commerce solutions are built with every merchant in mind from our integrated iFields solutions to our hosted paymentSITE.

  • Mobile payments

    Cardknox’s  mobile payment solution is seamless, fast and secure. From card-present to mobile wallet support, integrating your mobile software with Cardknox is not only cutting-edge, but the most rewarding as well.

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Presenting the new Cardknox Portal

Experience unprecedented control of your business’ payment activity with our ultra-flexible, user-friendly interface.

Upgrade to smarter payments

The most technologically advanced payment solution.

Experience payments that are smarter, faster, more secure and designed to seamlessly work with your software. Plus, get one-on-support to help you with any questions you have along the way.

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  •  In-house white glove customer support

  •  The most secure payment solution

  • Two decades industry knowledge

  •  Fast chip-card processing

  • A+BBB Rating & 98.3% retention rating

  • Technology to optimize your processing rates

Enjoy a universe of features

Built with a deep understanding of developer,
merchant, and customer preferences.

Fast & Secure EMV

When you choose Cardknox integrated with your software, you will be able to securely process EMV chip-cards that utilizes quick chip technology, resulting in the fastest transaction time.

Lower your processing fees

Benefit from the lowest rates optimized by Cardknox. Get a clear savings proposal in advance with the dollar amount of your eligible savings.

White-glove support

Cardknox is A+ rated with the BBB and is available on-demand to ensure your experience is always as smooth as possible. Benefit from specialized teams offering customer service and integration guidance to support your every need.

More equipment choices

Choose from the largest selection of EMV-ready terminals from Verifone, PAX, and Ingenico, all certified to work out of the box with Cardknox.

Tokenization & security

Advanced tokenization allows you to securely charge recurring payments. Plus, our available card updater keeps stored card data up to date, even if the expiration or account number changes. And with cardknox, you are covered with end-to-end level 1 PCI-DSS – no strings attached.

Fast next-day funding

We can route transactions based on each processing platform’s cutoff time, ensuring next-day funding on all credit card types, including American Express.

Ready to get started?

Create a sandbox account and start your EMV integration.

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