The need for flame-retardant materials with high mechanical properties is rapidly growing across numerous sectors such as construction and aerospace industries. This study provides a comprehensive comparative analysis focusing on flame retardant and mechanical characteristics of distinct resin-based fiber-reinforced composites. Glass and sisal fibers based two-dimensional woven fabrics were used as reinforcements with epoxy, vinyl ester, unsaturated polyester, and phenolic resin matrices. The resulting composites were evaluated for their flame-retardant and mechanical properties. The flame-retardant characteristics of composites were evaluated using cone calorimetry. The mechanical behavior of composites was characterized by a tensile strength test with the help of a Universal Testing Machine to examine the effect of fiber and resin systematically. The study intends to determine the resin compositions that offer an optimal balance between flame retardancy and mechanical strength, directing the selection of materials required for fire safety and structural reliability applications. The findings showcase the potential for significant improvements in both flame resistance and mechanical strength through strategic material modifications. This research adds vital insights to developing new composite materials with higher fire resistance without compromising mechanical functioning.