Table of contents

How E-commerce Payment Gateways Work
Key Types of Payment Gateways
Gateway vs Payment Processor
How to Choose a Gateway
FAQ

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Glossary
E-commerce Payment Gateway

E-commerce Payment Gateway

An e-commerce payment gateway carries card and wallet details from an online checkout to the acquirer and returns an approval or decline. With Payneteasy, you run it under your own brand on your own acquirers, with 1,000+ pre-built integrations and an OpenAPI 3.1 Processing API.

Table of contents

How E-commerce Payment Gateways Work
Key Types of Payment Gateways
Gateway vs Payment Processor
How to Choose a Gateway
FAQ

Do you have a question?

Contact author

Show all

How E-commerce Payment Gateways Work

To understand how e-commerce payment gateways work, let’s look at the simple process:

The customer pays at checkout with a card or a digital wallet.
The gateway encrypts the payment data and sends it to the merchant’s acquirer. It can also tokenize the card so it can be reused for later payments without storing the card number.
If 3-D Secure is used, the issuer first authenticates the cardholder. The acquirer then passes the authorization request through the card network to the issuing bank, which checks the card, the funds and fraud signals and approves or declines it.
The response returns through the gateway to the checkout within seconds.

For the basics, see what is a payment gateway; for the full flow, see e-commerce payment processing.

Key Types of Payment Gateways

There are three main types of payment gateway in e-commerce:

Gateway type	How it works	PCI DSS scope for the merchant
Hosted	The customer pays on the provider’s secure payment page — by redirect or embedded in an iframe.	Smallest: card data never touches the merchant’s systems.
Self-hosted	The payment form sits on the merchant’s own site, and the card details go from the customer’s browser to the provider.	Medium: card data doesn’t reach the merchant’s servers, but the page that collects it is in scope.
Direct API	Fully customizable: the merchant builds the checkout and connects it to the gateway through an API.	Depends on the build: the largest when card data passes through the merchant’s servers, smaller with hosted fields or tokenization.

Hosted gateways are the quickest to launch and the simplest to keep compliant; self-hosted and API integrations give more control over checkout, at the cost of more security responsibility.

E-commerce Payment Gateway vs Payment Processor

A payment gateway captures and encrypts card details at checkout and passes them on. A payment processor carries the authorization request between the acquiring bank and the card networks, and handles clearing and settlement on the acquirer’s behalf. Many e-commerce businesses need both, and a payment service provider often bundles them.

Payneteasy sits above that chain as a control layer: its payment orchestration platform connects your PSPs and acquirers behind one API, so you keep your own acquirers and your own risk.

How to Choose an E-commerce Payment Gateway

The right payment gateway is the one that delivers the outcome your business needs. Check these first:

Your own brand: put your name on the checkout, the merchant portal and the notifications with a white-label payment gateway.
Your own acquirers and risk: a control layer connects your PSPs and acquirers behind one API; you keep the relationships and the risk.
Connections already built: 1,000+ pre-built integrations with PSPs and payment methods, plus an OpenAPI 3.1 Processing API your engineers can plan against.
AI-ready operations: Payneteasy MCP Agent Access lets an AI assistant read payment operations data, but it cannot authorize, refund or move money.

Ready to compare options? Contact Sales to see how a white-label gateway fits your e-commerce business, explore our e-commerce payment solutions, or read about e-commerce payment processing and the payment gateway basics.

Frequently Asked Questions

What is a payment gateway in e-commerce?

It is the technology that captures payment details at an online checkout, encrypts them and passes them through the acquirer and card network to the issuing bank for approval, then returns the result to the store.

What are the types of payment gateways?

Hosted, self-hosted and direct API gateways. They differ in how much control the merchant has over checkout and how much card data — and therefore PCI DSS responsibility — the merchant handles.

How does a payment gateway work?

It encrypts the payment data and sends it through the acquirer and card network to the issuing bank, which approves or declines the payment. The response returns to the checkout within seconds.

What is the difference between a payment gateway and a payment processor?

A payment gateway securely captures and encrypts card details at checkout. A payment processor carries the authorization between the acquiring bank and the card networks and handles clearing and settlement on the acquirer’s behalf. Many e-commerce businesses use both.

Can I launch an e-commerce payment gateway under my own brand?

Yes. With Payneteasy’s white-label payment gateway, your brand goes on the checkout, the merchant portal and the notifications. Payneteasy provides the technology and control layer; you keep your own acquirers and your own risk.

Which payment methods can an e-commerce payment gateway accept?

Typically card payments, digital wallets such as Apple Pay and Google Pay, and alternative methods such as bank transfers, depending on the providers you connect. Payneteasy offers 1,000+ pre-built integrations with PSPs and payment methods.