<span lang="EN-US">The growth of e-commerce shows a significant increase, thus demanding logistics services to execute the product delivery process. Logistics service companies are competing to provide the best service to get the largest market share. One of the services is an increase in the form of Customer Relationship Management. This study aims to determine the impact of Customer Relationship Management on Competitive Advantage. To conduct this research, we used a case study on a logistics service company, namely Pos Indonesia. The method we use to determine the relationship is linear regression test. The results obtained, Customer Relationship Management provides a positive and strong relationship to Competitive Advantage. It can be said, if the company wants to increase its Competitive Advantage so that it can dominate the market share, the company can improve Customer Relationship Management. For further research, it is necessary to add variables that are considered in the factor of increasing Competitive Advantage, namely operational technicalities.</span>