1. A method for processing customer information, the method comprising: receiving, at a server, customer information of a first set of customers from a first entity, wherein the customer information comprises personally identifiable information and first entity customer attributes for the first set of customers; receiving, at the server, personally identifiable information for a second set of customers from a second entity; identifying common customers between the first set of customers and the second set of customers using the personally identifiable information; sending a list of a third set of customers to the second entity, wherein the third set of customers comprises the common customers and a plurality of other customers from the second set of customers; receiving, at the server, second entity customer attributes of the third set of customers from the second entity; and linking the first entity customer attributes and the second entity customer attributes of the common customers using the personally identifiable information.