It sounds like you are looking for an entitlement system[1]? In my experience, none of the SaaS providers mentioned help you with this, probably because it's v

It sounds like you are looking for an entitlement system[1]? In my experience, none of the SaaS providers mentioned help you with this, probably because it's very dependent on your product and business logic. Even with Kill Bill, which has an entitlement system[2], some amount of coding would be required to manage and enforce states like "max amount of users reached for that plan" (the logic would be abstracted from the billing though). - [1] http://killbill.io/blog/subscriptions-entitlement-billing-and-dunning/ http://killbill.io/blog/subscriptions-entitlement-billing-an... - [2] http://killbill.io/blog/blockingstate-abstractions/ http://killbill.io/blog/blockingstate-abstractions/