UniPay payment gateway was created by a team of talented engineers and business analysis, who have put their insight, ingenuity, and over 10 years of payment processing industry experience in design and implementation of the enterprise scale payment system. Since the time of its initial release, UniPay gateway remained one of the most flexible and innovative payment systems on the market. UniPay gateway is a robust, enterprise-scale, cluster-aware payment application, extensible and customizable enough to accommodate the needs of the most demanding clients. An already rich feature list gets regularly extended, while all underlying technologies get timely updated to include the most stable and up-to-date versions of the respective products. UniPay gateway is a cloud payment solution, which can be branded and white-labeled by payment services providers for ultimate merchant services experience. The entire payment platform is customizable through extensive and easy-to-use APIs. Built with modern, robust technology, UniPay gateway is the only enterprise scale payment system, which is open source. Availability of the source code makes UniPay gateway a highly customizable payment solution for super-ISOs and PSPs.