Best payment processing and gateways in 2026

What is payment processing and a payment gateway?

Payment processing is how businesses accept and complete customer payments, moving money from a customer's card or account to the business's account, while a payment gateway is the technology that securely transmits payment details between the business, customer and banks. In practice, modern providers often combine both: they capture the payment online or in person, send it securely through the gateway, process it with the card networks and banks, and settle funds to the business, handling security, fraud and compliance along the way. For online businesses it means accepting cards and wallets on a website or app, and for physical businesses it means taking payments at a point of sale, all handled by a payment provider.

It matters because accepting payments smoothly and securely is essential to revenue, and the right provider affects conversion, cost, reach and reliability. As commerce shifts online and global, payments technology is central. The payment gateways market reached about 27.6 billion US dollars in 2025 and is forecast to reach 45.4 billion by 2034, a 5.51 percent compound annual growth rate ^{[IMARC Group]}, driven by e-commerce and mobile payments.

How payment processing works

A payment flows through several steps in seconds. The customer enters card or wallet details online, or taps or inserts a card in person. The payment gateway securely transmits these details, encrypted, to the processor. The processor routes the transaction through the card networks to the customer's bank, which authorises or declines it based on funds and fraud checks. If approved, the transaction is captured and, later, the funds are settled to the business's account, minus fees. Throughout, the provider handles security, PCI compliance and fraud protection. Modern providers bundle gateway and processing, so businesses use one platform to accept payments across channels.

The category spans models and use cases. Online and developer focused platforms like Stripe, Braintree and Checkout.com offer APIs to accept online payments, often globally. Broadly trusted brands like PayPal are accepted widely and easy to add. All in one and in person platforms like Square combine processing with point of sale and business tools. Enterprise and global platforms like Adyen unify payments across channels and countries. Gateways like Authorize.net connect a merchant account to a website, and value or regional players like Helcim, Stax and Razorpay serve specific needs. The right provider depends on online versus in person, scale, geography and whether you want developer flexibility, simplicity or low cost.

Key features to look for

Payment providers differ, so focus on what matters for how you sell.

• Online and in person acceptance, matching how your customers pay.
• Payment methods, cards, wallets like Apple Pay and Google Pay, and local methods.
• Pricing, per transaction rates and any monthly or interchange based fees.
• Developer tools and APIs if you need custom online payments.
• Security and fraud, PCI compliance and fraud protection built in.
• Global reach and multi currency if you sell internationally.

Types of payment provider

Online and developer platforms like Stripe, Braintree and Checkout.com offer APIs for online payments. Trusted brands like PayPal are accepted widely. All in one and in person platforms like Square combine processing with POS. Enterprise and global platforms like Adyen unify payments at scale. Gateways like Authorize.net, and value or regional players like Helcim, Stax and Razorpay, serve specific needs.

How to choose the right provider

Start with how you sell. For online payments with developer flexibility, Stripe leads, with Braintree for PayPal connected online and Checkout.com for global online enterprises. For broad, trusted acceptance and easy checkout, PayPal. For in person and small business all in one, Square. For enterprise, global, multi channel payments, Adyen. For a proven gateway to connect a merchant account, Authorize.net, and for transparent low cost, Helcim or Stax. Regional players like Razorpay fit specific geographies. Match the provider to online versus in person, scale and geography.

Then weigh three practical factors. First, your channel and customers, online, in person or both, and the payment methods they use. Second, pricing, flat per transaction rates versus interchange based or subscription models, which matter more at volume. Third, developer needs, global reach, and reliability, plus how smoothly it integrates with your website, POS or e-commerce platform. Compare total cost for your volume and cross check verified reviews on G2 and Capterra.

Payment processing pricing explained

Most providers charge a percentage plus a fixed fee per transaction. Flat rate pricing is common and simple: Stripe and PayPal are around 2.9 percent plus about 30 cents online, Square around 2.6 percent plus 10 cents in person and 2.9 percent plus 30 cents online, and Braintree around 2.59 percent plus 49 cents. Interchange plus pricing, as with Helcim and Adyen, passes through card network costs plus a transparent margin, often cheaper at volume. Subscription models like Stax charge a monthly fee plus interchange rather than a percentage markup, suiting higher volume businesses. Gateways like Authorize.net add a monthly fee on top of per transaction rates.

Because fees scale with sales, your total depends on volume and average transaction size, so model both. Flat rate pricing is simple and fine at lower volume, while interchange plus or subscription models can save significantly at higher volume. International and currency conversion add fees. Compare the effective rate for your actual sales, including any monthly fees, and weigh cost against reliability, features and the payment methods and reach you need, which affect revenue as much as the rate.

Payment trends in 2026

Digital wallets like Apple Pay and Google Pay keep growing, so accepting them is increasingly essential. Embedded payments and platforms, where software businesses offer payments within their products, are expanding, often via Stripe or Adyen. Global and local payment methods matter more as commerce crosses borders. AI is improving fraud detection and payment optimisation to lift approval rates, and unified commerce, accepting payments seamlessly online and in person on one platform, is a growing expectation, alongside real time and account to account payments in some markets.

Common mistakes when buying

• Choosing on headline rate alone. Model your effective rate at your volume and transaction size.
• Ignoring the payment methods customers want. Missing wallets or local methods costs conversions.
• Overlooking in person versus online fit. Match the provider to how you actually sell.
• Forgetting integration. It should work with your website, POS or e-commerce platform.
• Underestimating holds and support. Payment holds and support quality affect cash flow and operations.