What are people using for payment processing?

I have used Authorize.net and similar providers in Europe several times, and the RYO approach is pretty simple, enough so that I'd recommend it over a separate solution unless you have well tested that solution and your needs are sufficiently complex. The caveat is that I have only done this with WebObjects, not Rails, but I don't anticipate any problems in a Rails implementation.


I've used Authorize.net and Verisgn's Payflow Pro both with Rails. Authorize.net is easier to use but Verisign works.

I'm probably going to use TrustCommerce on my next project.