The synergetic impact of graphene as a matrix strengthener in hybrid (flax/E-glass/epoxy) fiber-reinforced polymer (HFRP) composites at varied compositions was investigated. The bodily, mechanical, and thermal properties of the HFRP composites have been completely evaluated for varied wt.% of graphene added to the epoxy resin. The HFRP composites have been ready by including graphene to epoxy resin was impregnated on the flax/E-glass cloth utilizing the compression molding approach. Important enchancment of tensile energy, flexural energy, shear energy, shore D hardness, affect energy and interlaminar shear energy (ILSS) of the composites elevated by 86%, 85%, 43%, 26%, 50%, and 80% respectively at 0.6 wt.% of graphene. Appreciable discount within the share of water absorption was additionally noticed. Thermogravimetric evaluation (TGA) was used to judge the thermal degradation of the composites, and the impact of floor therapy on flax fiber was validated utilizing Fourier-transform infrared spectroscopy (FTIR). Fractography revealed that the primary failure mechanism was as a consequence of matrix fracture and interfacial debonding. The outcomes confirmed that 0.6 wt.% of graphene with HFRP composite laminates considerably improved the energy of composites and make them extremely appropriate for vehicles and structural purposes.