SubscriptionBridge + Braintree
Braintree is a very popular, full featured payment system: it provides you with both a payment gateway and a merchant account, and charges zero fees on the first $50,000 in transactions.
Why do I need both?
Braintree contains basic recurring billing features. SubscriptionBridge adds a number of advanced subscription management and customer service features to Braintree recurring billing. In a nutshell, here is how the two systems work together:
Which features does SubscriptionBridge add to Braintree?
Here's a partial list of features that become available when you use SubscriptionBridge with Braintree.