I've setup a hosted payment solution (i.e. the customer is redirected to the provider) for a minor e-commerce so I have some experience on the matter.
My recommendation would be to select a provider that:
1. is based in Germany. Having a provider that has the same business hours as you and to whom you can actually phone and talk in your own tongue is very important. When - not if - you get into trouble and require support, you need to get it ASAP, not wait for an email many hours later.
2. Provides the features, technology and support you require. You'll need a solution that accepts major credit cards, but this is raraly a problem. Equally important and often neglected, is how good the solution is techniqually. Can you work in any programming language (you should)? Are you provided with good documentation, examples, needed graphics, etc?
I've setup a hosted payment solution (i.e. the customer is redirected to the provider) for a minor e-commerce so I have some experience on the matter.
My recommendation would be to select a provider that: 1. is based in Germany. Having a provider that has the same business hours as you and to whom you can actually phone and talk in your own tongue is very important. When - not if - you get into trouble and require support, you need to get it ASAP, not wait for an email many hours later.
2. Provides the features, technology and support you require. You'll need a solution that accepts major credit cards, but this is raraly a problem. Equally important and often neglected, is how good the solution is techniqually. Can you work in any programming language (you should)? Are you provided with good documentation, examples, needed graphics, etc?