In this research, the effect of linear and nonlinear dynamic absorbers on reducing the maximum vibration amplitude of thin beams under external excitation has been investigated and compared. The main goal is to compare the performance of the linear absorber against the nonlinear type to achieve the greatest reduction in beam displacement. Timoshenko beam theory has been used to simulate the dynamic behavior. To create linear and nonlinear behavior, a spring with a cubic geometry has been used so that the optimal values of the spring parameter in both cases are determined to minimize the beam deflection. In all cases, linear damping coefficient has been assumed. In the applied Timoshenko beam model, the effects of shear deformation and rotary inertia, which are neglected in the Euler-Bernoulli model, are included. The accuracy of the results has been evaluated by direct comparison between the two beam models. Also, the results of this research have been compared with other researchers' findings in this field. Since the beam amplitude may increase at several different excitation frequencies, the number of absorbers is considered variable, and the presented equations impose no limitation on the number of absorbers. The results from both beam models have been shown using diagrams, and a comprehensive comparison between the linear and nonlinear behavior of absorbers in reducing the dynamic response of the beam has been presented.