<p>Among the various 3D printing techniques, stereolithography (SLA) stands out for its use of liquid photopolymer resins. These resins hold significant promise for future terahertz (THz) devices due to their exceptional capabilities in microfabrication. However, to fully realize their potential in THz applications, developing specialized resins with lower loss properties is essential. In this context, this study considers the synthesis, fabrication and characterization of epoxy-acrylate photopolymer resins for THz applications. Besides that, it conducted a systematic and comparative analysis of the dielectric properties of the produced photopolymer resins to enhance their potential utility. The results show that styrene-based monomers can reduce the photopolymers’ absorption coefficient and loss tangent. On the other hand, acrylate-based monomers increase the permittivity of the photopolymers. Finally, the produced photopolymer resins are compared with the commercial photopolymer resins. The results emphasize the collaboration between materials science and additive manufacturing, leading to innovative designs and applications in the terahertz field.</p>