This research paper presents a comparative analysis of reservation systems in hotels of Delhi, focusing on in-house and third-party platforms. Reservation system is a software application utilized in the hotel sector to efficiently oversee room availability, pricing, and reservations. The study objective is to evaluate and compare the efficiency, user-friendliness, security, and overall performance of these reservation systems. The research utilized a paired t-test and GAP analysis via IBM SPSS software version 26 to assess the data collected from 148 guests staying in Ministry of Tourism approved 4-star, 5-star, and 5-star deluxe hotels in Delhi. Data was gathered using a convenience sampling method. The study identified 15 key variables related to the reservation process, including usability, information completeness, search functionality, data security, and customer preferences. Results revealed that 13 variables were significant in influencing the user experience, while 2 variables showed no significant impact. The findings provide valuable insights for improving reservation systems in the hospitality industry