The objective of this study is to investigate the determinants of users intention to adopt Islamic fintech in Indonesia. The literature on main attributes of financial technology adoption were systematically reviewed to establish the research model. The PLS-SEM methodology was adopted to test the proposed hypotheses and predict the relationship between the constructs. Responses of 242 Islamic fintech users in the Greater Jakarta were collected and analyzed with the help of Smart PLS 3.0 software. The findings indicated that perceived benefit, trust, and religiosity significantly and positively determine the users intention to adopt Islamic fintech services. However, it was found that perceived risk does not significantly affect users trust. While the findings help to broaden the understanding about users intention to adopt Islamic fintech services, especially with the presence of the religiosity variable, only users in the Greater Jakarta were covered. This research encourages future studies to use a larger population in Indonesia for improvement.