Software-as-a-Service (SaaS) is a software deployment and subscription pricing model in which an application is delivered and managed as a service. Clients use SaaS applications because it allows them to have best-of-breed applications at minimal costs. The advantages of SaaS to the client include; no hardware or software costs, much quicker time to enter the market, and they receive continuous updates and upgrades to the application. Companies employing SaaS models have a greater Return On Investment (ROI) at a lower total cost.

eStoreXpress is the engine that allows this whole process to work. Through the eStoreXpress application many online eStores are connected to many vendors in a seamless online shopping experience. Each eStore can be customized to create a unique "look and feel". They can change their banner, post their hours, add information about themselves, and deselect any product they may not want sell on their eStore.

The order process is completely automated. Once the consumer places the order on an eStore the order is automatically sent to the proper vendor. When the vendor receives the order the product is picked, packed and shipped by the vendor directly to the consumer. The order packing slip is branded to identify the eStore it was ordered from as the shipper.

The eStoreXpress application also handles the financial process completely. When the order is placed the credit card is verified and the amount is approved. The order is sent to the vendor for fulfillment. When the vendor closes the order at the time of shipping the credit card is charged. The application then is able to complete process. Commissions are paid to eStore owner, and payments are made to the vendor and the application owner.