A Zen Cart payment gateway is the module and processing service that takes card payments in your Zen Cart checkout. eCom Pay brings modern payments to established Zen Cart stores: 3D Secure 2, tokenisation, wallets and Open Banking, with rates agreed by a UK specialist and next working day settlement, without forcing you to replatform.
24 hrs
approval, once documents are in
150+
currencies processed
4.4
Trustpilot rating
2010
processing payments since
On this page Choosing a provider · The integration · Going live · See it working · Once you are live · FAQs
A Zen Cart store that has traded for years is an asset, not a legacy problem. Choosing a gateway for it comes down to three questions worth asking anywhere, including here.
Check your approval oddsZen Cart is open source PHP, and payment modules need someone comfortable working in it. Ask who installs the module, who tests the checkout and who supports it after. Our developers have worked in open source carts since 2007, and they do all three.
An established store deserves current standards. 3D Secure 2, tokenisation so card data never touches your server, and strong authentication on eligible payments. Ask any provider to confirm all three for your setup. Ours ships with them as standard.
Settlement speed is a cash flow decision whatever the platform. Get the answer in working days, in writing. Ours is the next working day, visible in your dashboard.
Your catalogue, your customers and your search rankings stay exactly where they are. The payment layer is the only thing that gets an upgrade.
The gateway is integrated into your existing Zen Cart checkout by our developers, tested against your actual templates and modules rather than a vanilla install.
3D Secure 2 strong customer authentication and tokenised card handling bring your checkout to current standards, with card data kept off your server entirely.
Apple Pay, Google Pay and bank to bank Open Banking payments join cards at your checkout, and Open Banking payments cannot be charged back at all.
Processing in over 150 currencies with settlement in more than 25, so the international customers your store has earned over the years pay in their own money.
Every transaction, settlement and dispute in one dashboard, so a long trading history finally comes with numbers you can actually read.
Support that understands an open source cart. When a question is technical, you reach developers who work in this stack, not a script.
Fair. So here is what UK merchants say after switching to eCom Pay, in their own words.
It was such a pleasure working with eCom Pay for my company, very straightforward to set up and the team were so helpful. No hidden fees, cost efficient, and from using other platforms before I can say this has been the best so far.
Verified merchantvia Trustpilot
We found eCom Pay to be a simple, efficient payment system to integrate, with a lot of support behind it. Would recommend them over competitors who charge far too much.
Verified merchantvia Trustpilot
Great customer service from eCom Pay. Needed a card reader for my business, they had me set up fast and gave me better rates than the last company. Highly recommend.
Verified merchantvia Trustpilot
Super impressed with eCom Pay. The transaction fees are competitive, and I love that my customers have multiple payment options, which has noticeably improved my sales.
Verified merchantvia Trustpilot
Good service from eCom Pay. The card machines are reliable and easy to use. I like that there are no hidden fees and everything is explained upfront.
Verified merchantvia Trustpilot
Would highly recommend. Easy, simple, and always answers when I need help. The best payment gateway I have come across, with a wide variety of packages available.
Verified merchantvia Trustpilot
The application is the start, not the product. This is what running your payments with eCom Pay actually looks like, week to week.
Zen Cart updates, PHP versions and module conflicts are handled by developers who work in open source carts. Compatibility is our problem to solve, not yours.
Available 24/7 by phone, WhatsApp or email. Rate reviews and new plans go through your account manager, and specialist sectors get a dedicated Risk Analyst too.
Next working day settlement, every working day. A store with years of trading behind it deserves cash flow it can set a watch by.
Disputes come with evidence guidance and merchant-side support through the process, with fraud tools tuned to your patterns working to prevent them.
Yes, absolutely. Zen Cart remains a capable open source cart, and with a current gateway behind it your store takes cards, Apple Pay, Google Pay and Open Banking payments to modern security standards. eCom Pay fits that gateway to your existing build.
The best Zen Cart payment gateway is one that is actually integrated and supported by people comfortable in open source PHP, with current security standards behind it. That is the service here. Fitted by our developers, 3D Secure 2 and tokenisation as standard, settled the next working day.
No. Replatforming is a big decision that should be made for business reasons, not forced by a payment provider. The gateway brings wallets, Open Banking, 3D Secure 2 and tokenisation to the store you already have, and if you ever do migrate, we come with you.
Compliance depends on how card data is handled. With this gateway, card data is tokenised and never stored on your server, which keeps your PCI scope minimal, and 3D Secure 2 runs on eligible payments. Your specialist confirms exactly what your setup needs.
Your account is approved in 24 hours once your documents are in, and our developers then fit and test the module on your build. We can run the new gateway in parallel with your existing one so there is no downtime during the switch.
We integrate against your actual store, templates and modules included, and test the full checkout before anything goes live for customers. Custom builds are the normal case in Zen Cart, not the exception, and our developers treat them that way.
Yes. Processing runs in more than 150 currencies with settlement in over 25, so international customers pay in their own currency and you settle in yours, the next working day.
There is no setup fee to apply, integration is part of the service, and transaction rates are agreed by a UK specialist against your actual turnover rather than a flat tariff. Everything is set out in plain terms before you sign.
Written by the eCom Pay team. Reviewed August 2026. Last updated August 2026.
Approved in 24 hours once your documents are in, fitted and tested by developers who speak your stack, settled the next working day.
Running WooCommerce or Shopify elsewhere? See the WooCommerce and Shopify gateways, or all online payment solutions.