We have a merchant account with Bank of America. My boss is checking into Intuit to replace Heartland. We don't want a third party processor like Authorize.net, we want to keep our own merchant account and not use a third party's due to our fairly high monthly volume. It's hard weeding through all the options because you tend to see a lot of third party processors mixed in with all the discussions. We just want our own gateway.
Is Quantum an option we would be looking for? What are some other options for gateways only? We have the ability to do the development to tie it into our system. We don't want a hosted solution. We want it to be completely tied into our website.
A typical setup is to have cart software (like osCommerce etc.) built into your website, a payment gateway, and a merchant account. There are many gateways out there. What country are you in? There may be recommended ones in your region.