Ian, I know that Paypay has a poor reputation for being buyer centric but they have 14% of the global market (http://buswk.co/eN1mCa http://buswk.co/eN1mCa) so

Ian, I know that Paypay has a poor reputation for being buyer centric but they have 14% of the global market (http://buswk.co/eN1mCa http://buswk.co/eN1mCa) so they are doing something right. I deployed Paypal for my SAAS (http://www.simplesecurityra.com http://www.simplesecurityra.com) and it was really simple to setup. I wanted to do a subscription based service with automatic billing and it works really well. I have quite a few users now and have never had a problem. I would agree that having a monthly subscription is lot likely to mean you get a lot less re-evaluating the service. I mean it works for gym's and cable TV so why not you? There are no monthly fees and the transaction fees are not that bad (GBP for me): Purchase payments received (monthly) Fee per transaction £0.00 GBP - £1,500.00 GBP 3.4% + £0.20 GBP £1,500.01 GBP - £6,000.00 GBP 2.9% + £0.20 GBP £6,000.01 GBP - £15,000.00 GBP 2.4% + £0.20 GBP £15,000.01 GBP - £55,000.00 GBP 1.9% + £0.20 GBP above £55,000.00 GBP* 1.4% + £0.20 GBP You could also consider Google checkout and Amazon checkout but I think Paypal is the best of these choices.