For many engineering structures such as bridges, ships, and aerospace applications, high stiffness must be provided to combat the problem of vibrations. This stiffness is achieved by attaching stiffeners to the flat plate. Stiffeners absorb the vibrational load to avoid any kind of fracture or deformation in a stiffened plate. In the present analysis, the effects of various boundary conditions and shapes of stiffeners on the vibration characteristics of isotropic stiffened plates are discussed. ABAQUS is used for shell modeling to demonstrate the vibration analysis of stiffened plates. A Comparative study of the natural frequencies of plates with T-type and Γ-type eccentric stiffeners at various vibration modes is performed. An eight-nodded S8R, 2D shell element having 6 degrees of freedom per node is considered for the analysis. Quad type element is meshed using a structured technique. The natural frequencies of stiffened plates with clamped boundary conditions are found to be higher than their corresponding values with other boundary conditions. Linear trend of natural frequencies with plate thickness has also been observed.