At the present-day gateway services market there are several payment gateway solutions a company can chose from. It can use a third-party payment gateway product, some flavor of a white-label payment gateway, license open source payment gateway software, or develop its on customized product from scratch.
Some companies erroneously think that switching from a third-party gateway to an open source payment gateway product is always a beneficial option. Although some part of transaction processing costs, gateway fees, and related cost items can be reduced and eliminated, new costs emerge as you switch to an open source payment gateway product (or develop your own solution from scratch). Transition is financially relevant only if the savings are greater than the new expenditures resulting from switching to an open source solution.
More detailed information on when having an open source payment gateway of your own is a lucrative scenario can be found in our respective article on Paylosophy blog.