[nhangen]

Easier said than done when your product requires that you integrate with dozens of gateways.

[jonknee]

You could say the same thing about invoicing!

[lulmerchant]

Why not use Spreedly then? Way cheaper, and removes a lot of the headaches from the make-it-yourself approach.

[manuelhuez]

Shameless plug here! We also created something we called our Smart Router engine at https://processout.com, which helps you connect to dozens of payment providers and optimize your transactions.