The Difference Between the Client and the Customer By Annissa Coy Before we can talk about the difference between the client and the customer I thought we should look up the definition of each. And this is what I found: A Customer:A person or organization that buys goods or services from a store or business. A Client: One that is under the protection of another :dependant on. This really fits how I describe the difference between the two. You see a customer is a transaction and a client is a relationship. Customers are what we get when we take a persons money and do nothing to create a connection with them and not worry about ever getting them to spend their money again with us sometime in the future.