In the digital age, data-driven UI/UX design lies at the heart of creating user-to-user compelling, personalized experiences. On the other hand, as more and more interfaces came to rely heavily on personal data, privacy concerns grew loud enough to demand that UI/UX design agencies and UI/UX design companies anchor trust building at the core of their design strategies. This article shows how to maintain user trust by making the triangular relationship between privacy, transparency, and security in data-driven UI/UX design their focal points. Why Privacy Matters in UI/UX Design Users want personalized experiences, but privacy and data control come first. If users perceive their data exploitation, they will likely abandon the platform. Therefore, trust and transparency are crucial in this situation. Data-driven principles can help create functional UI/UX designs, but designers should first adopt approaches that will make users trust them. How to Establish User Trust in Data-driven UI/U