The exact number changes constantly, but there are hundreds of payment processors worldwide

There is no single official count of payment processors because new ones launch regularly and others shut down or merge. In the United States alone, there are roughly 500 to 1,000 active payment processors, depending on how you define the term. Globally, the number is much higher — somewhere in the thousands. The reason the count matters less than you might think is that most people and businesses end up using one of a much smaller group of well-established processors that handle the majority of transactions.

A payment processor is a company that moves money from a customer's bank account or card to a business's account. They sit between you, the merchant, and the banks involved. Some processors are massive and handle millions of transactions daily. Others are tiny and serve only a specific industry or region. The size and reach of a processor affects what it costs, how fast payments clear, and what features you get.

Key Takeaways

  • The United States has between 500 and 1,000 active payment processors, with hundreds more operating globally.
  • A small number of large processors — Stripe, Square, PayPal, and a handful of others — handle the majority of online transactions.
  • Processors vary by what they specialize in: some focus on online stores, others on in-person payments, others on invoicing or subscriptions.
  • The number of processors available to you depends on your business type, location, and the payment methods you want to accept.

Why the count varies so much

The number of payment processors is hard to pin down because there is no licensing requirement that creates a central registry. Banks, fintech companies, and software platforms all operate as processors. Some are independent businesses. Others are divisions of larger financial companies. A processor that existed five years ago may have been bought by a competitor, merged with another firm, or straightforward shut down.

The definition of "payment processor" also matters. If you count only companies that directly connect to the banking system, the number is smaller. If you include every platform that lets you accept payments — including payment gateways, which are slightly different — the number grows. Most people use the terms interchangeably, even though a payment gateway and a payment processor are technically different roles.

The processors most people actually encounter

While hundreds of processors exist, a much smaller group handles the bulk of transactions. Stripe, Square, PayPal, and Shopify Payments are the largest in the United States for online and mobile payments. For in-person card payments, you might use Square, Toast, Clover, or a processor tied to your bank. For invoicing and recurring payments, you might use Stripe, PayPal, or a specialized platform like Authorize.net.

The reason a few processors dominate is partly because they offer good rates and features, but mostly because they are straightforward to set up and widely trusted. A new business owner can start accepting payments with Stripe or Square in hours. That convenience matters more than the existence of 500 other options.

How processors specialize by industry and payment type

Not every processor works for every business. Some specialize in specific industries: healthcare processors handle patient payments and insurance claims differently than retail processors. Some focus on a single payment method — cryptocurrency processors, for example, or ACH processors that move money between bank accounts. Others are built for a specific use case, like subscription billing or marketplace payments where money flows between multiple parties.

Your options also depend on your location. A processor operating in the United States may not work in Canada or Europe. Some processors serve only certain countries or regions. If you are a business in a high-risk industry — like gambling, adult services, or CBD sales — many mainstream processors will not work with you, and you have to find a specialized processor that accepts that risk.

The difference between payment processors and payment gateways

The terms are often used as if they mean the same thing, but they describe different parts of the payment chain. A payment gateway is the software that collects payment information — the form on a website where you enter your card number, or the terminal at a checkout counter. A payment processor is the company that takes that information and routes it to the banks to move the money.

In practice, most companies that call themselves processors also provide the gateway software. Stripe, for example, provides both the form you fill out and the backend system that processes the payment. So the distinction matters mostly if you are comparing technical details or building a custom setup. For most people, you pick one processor and it handles both parts.

What changed in recent years

The number of payment processors has grown because the barriers to entry have fallen. Ten years ago, starting a payment processor required relationships with banks, expensive infrastructure, and regulatory approval. Now, fintech companies can build on top of existing processors and offer their own services. A software company can partner with Stripe and offer payments as part of their product without building the processor itself.

This has created layers: some companies are "processors of processors." They take payments on behalf of other platforms. This makes the total count harder to measure, because you might be using a processor without knowing it — your invoicing software might use Stripe behind the scenes, for example.

How to choose a processor when so many exist

The large number of processors is less important than finding one that fits your specific needs. Start by asking: What payment methods do you need to accept? Do you need in-person, online, or both? What is your monthly transaction volume? What industry are you in? What countries do you operate in? The answers to these questions narrow the field dramatically.

Most small businesses end up choosing between three or four processors because those are the ones that work for their situation. Reading reviews and comparing rates matters, but the processor that works best for a coffee shop is different from the one that works best for a software company or a nonprofit. The existence of 500 processors does not mean you have 500 real options — you probably have 3 to 5.

Frequently Asked Questions

Is there a list of all payment processors?

No official complete list exists because processors are not centrally registered. Industry databases and directories list hundreds of processors, but they are never fully up to date. The most useful approach is to search for processors that serve your specific industry or use case rather than trying to review all of them.

Do I need to use a big processor like Stripe or Square?

No. Smaller processors often offer better rates or features for specific industries. However, the large processors are popular because they are reliable, straightforward to set up, and widely accepted by customers. If a smaller processor meets your needs and costs less, it is a valid choice.

Can a processor go out of business and leave me stranded?

It is rare but possible. When a processor shuts down, it usually gives businesses time to move to another processor. Your money in the processor's account should be protected, though the transition can be disruptive. Choosing an established processor reduces this risk.

What is the difference between a payment processor and a payment service provider?

A payment service provider (PSP) is a broader term that includes processors, gateways, and sometimes other services like invoicing or accounting. Stripe and PayPal are both PSPs because they offer multiple services. A processor is more narrowly focused on moving money between accounts.

Do I have to use the same processor for online and in-person payments?

No. You can use one processor for your website and a different one for your physical location. Many businesses do this. However, using the same processor for both can simplify accounting and reporting, and some processors offer discounts if you consolidate.