Using the product and/or our engineering services is done via the following methods. The first is a flat 5% transaction fee for on-prem and self-managed (aka self-hosted) instances. For managed platforms, the rate is a flat 10% of all transactions. The second is to buy our software and run it on your own server. There are no transaction fee this way. You will pay a flat fee up front and will have access to software updates in perpetuity. If you would like to discuss this option, please Email us to discuss.