Create Your Own Ecommerce Website with Our Single Vendor Marketplace Platform MartPro's single-vendor solution has an easy-to-use front design for launching a successful online rental website. The software has an attractive dashboard. A Single Vendor Marketplace is a website where a single seller sells its products to multiple customers. With a single-vendor rental eCommerce solution, everything is faster and many business processes require a more effortless approach, as there are lesser people involved in a selling-buying process and you have a single supplier.