# Payment processors and methods

You can install payment extension packages to integrate with third-party Payment Service Providers (PSPs) or add FinDock native payment processing. Each payment extension supports specific [payment methods](/docs/payment-processors/payment-methods/payment-methods-overview).

Organizations must have their own contracts the respective PSP or bank. These contracts determine, for example, which payment methods can be used.

When installing payment extensions, keep in mind [multi-merchant](/docs/payment-processors/multi-merchant-accounts-for-psps) and [multiple currency](/docs/payment-processors/multiple-currency-support-in-findock) support.

Adyen
Authorize.net
Axerve
Buckaroo
Checkout.com
FinDock
Gift Aid
GoCardless
Mollie
PayPal
Redsys
Saferpay
SmartDebit
Stripe
Swish
Tikkie
Vipps
Worldpay