there are many things to consider when choosing the right payment solution for your SaaS website. Simple solutions like Paypal and stripe might work well if all you need is a plug-in-play solution but theses out of the box products might not give you the the full suite of tools you'll need once your business and volume grows. Recurring Billing, Secure Vault Storage, Post re-direct, Fraud Protection and management and simple PCI Compliance are going to be key to your success. We have payments pros on staff as well as developers that would be happy to answer your questions anytime just give me a call direct 310.997.0100 http://www.ndmscorp.com Ask for Todd or Mike