This study conducts a comparative systematic literature review of halal tourism research in Indonesia and Malaysia from 2010 to 2022. Using PRISMA, 216 studies were initially identified, reducing to 79 that met the criteria. The earliest Malaysian halal tourism study was published in 2011, peaking in 2020, while the earliest Indonesian study was in 2017, peaking in 2021. Customer behavior theory is the most widely used framework in both countries. Malaysian studies are dominated by hospitality themes, while Indonesian studies focus more on tourist behavior. Indonesian studies also explore themes such as local Islamic wisdom, halal tourism technology, regulations, and tourism development, which are less explored in Malaysian studies. The study highlights opportunities for future research in both countries, particularly in areas where one country has a stronger focus.This study conducts a comparative systematic literature review of halal tourism research in Indonesia and Malaysia from 2010 to 2022. Using PRISMA, 216 studies were initially identified, reducing to 79 that met the criteria. The earliest Malaysian halal tourism study was published in 2011, peaking in 2020, while the earliest Indonesian study was in 2017, peaking in 2021. Customer behavior theory is the most widely used framework in both countries. Malaysian studies are dominated by hospitality themes, while Indonesian studies focus more on tourist behavior. Indonesian studies also explore themes such as local Islamic wisdom, halal tourism technology, regulations, and tourism development, which are less explored in Malaysian studies. The study highlights opportunities for future research in both countries, particularly in areas where one country has a stronger focus.