 This research examined the efficiency of four courier services in Hulu Terengganu, Malaysia. It used data endowment analysis, DEA, to identify the best performing courier service based on customer satisfaction. DEA was chosen due to its ability to handle complex relationships between multiple inputs and outputs. The inputs included assurance, empathy, reliability, responsiveness, tangibility, and price. Customer satisfaction was measured as the output criterion. The results indicated that Poslaju was the most efficient courier service, followed by CityLink Express and JNT Express. GD Express was found to be the least efficient. The findings suggest that Poslaju should focus on improving its assurance, empathy, and tangibility to further improve its overall performance. This article was authored by T.O. Yunkin, Susanawati Abu Hassan and City Nur Attica Zahari. We are article.tv, links in the description below.