We're working on logins with payments for SASS apps at http://authic.com http://authic.com That said, our offering is pretty different from what Amazon is doin

We're working on logins with payments for SASS apps at http://authic.com http://authic.com That said, our offering is pretty different from what Amazon is doing. We are more about letting apps customizing their login/payment experience so that customers don't realize they are not interacting with the app. We let you integrate with your Braintree account (Stripe support on it's way). Our aim is to make take away the common developer drudgery of setting up signup, signin, password reset, recurring payments and sending out pdf receipts that are common to building SASS webapps.