What is the difference between a PSP and an acquirer?

PSP is a broad term for any provider that lets merchants accept payments, from gateways to full-stack processors. An acquirer is the licensed member of the card schemes that contracts with merchants and settles card payments to them. Some PSPs are also acquirers.

What an acquirer does

• Holds a license and scheme membership to acquire card transactions.
• Contracts with merchants and underwrites their risk.
• Sends authorizations to the networks and settles funds to merchants.
• Is responsible toward the schemes for its merchants' compliance.

What a PSP can be

• A gateway that connects merchants to acquirers.
• A payment platform offering several methods, cards and local methods, through one integration.
• A PayFac onboarding sub-merchants.
• A full-stack provider that is also an acquirer.

Why the distinction matters

When something goes wrong, such as a dispute, a settlement delay or a compliance question, the acquirer is the party responsible to the schemes. A PSP that is not an acquirer relies on acquiring partners.

In practice

Many merchants deal only with their PSP, which manages acquirer relationships behind the scenes.

What it means for payment operators

If you run a PSP, your platform sits between your merchants and your acquiring partners. One connection to many acquirers, with your own brand on top, lets you serve merchants without becoming an acquirer yourself.