Supported integration methods for APMs

You can offer payment providers for your consumers using any of the following integration methods, depending on what the payment provider supports:

Through Express APM, in an iframe that displays all payment methods available to the consumer, with a radio button to select the desired payment method.
In an individual iframe on the page for each APM.
Using a custom method (such as your own button or image) to redirect to the payment provider.

The following table shows which integration methods are supported by each payment method:

Alternative Payment Method	Multi-APM iframe (ExpressAPM)	Individual-APM iframe (button iframe)	Custom (redirect)
Afterpay through Citcon	Y	Y	Y
Apple Pay	Y	Y	N
Google Pay	N	Y (through custom DIV only)	N
Klarna	Y	Y	N
Paynet	Y	Y	Y
PayPal / PayPal (with Braintree)	Y N	Y Y	Y N
Sofort through Checkout.com	Y	Y	N

Given this information, there are pros and cons to each method.

Integration method	Pros	Cons
Multi-APM iframe (ExpressAPM)	Fastest and easiest integration. Most (but not all) APMs are supported.	Very little customization possible. No control over the look of the APM button. Adding or removing APMs changes the size of the iframe.
Individual-APM iframe (button iframe)	This is the only method where every APM is supported. Since they are separate, adding and removing APMs does not affect existing ones.	No control over the look of the APM button. Some APMs display as a form instead of a button.
Custom (redirect)	Complete control on how the integration looks and works. Since they are separate, adding and removing APMs does not affect existing ones.	Few APMs are supported with this option. Complex integration work.