Auth is nothing more than a gateway, ie, hosted software. There are numerous gateway software available which you can run yourself and connect directly to your

Auth is nothing more than a gateway, ie, hosted software. There are numerous gateway software available which you can run yourself and connect directly to your merchant acquirer. Many might want to consider Chase Paymentech, the largest acquirer, whom you can directly connect with. Paypal runs their credit and partner transactions over the Paymentech network if that gives you any confidence.