Ag doped SnS nanoparticles were prepared by CTAB assisted solvothermal method. XRD analysis of drop casted films (as deposited) revealed the presence of orthorhombic phase pure SnS nanoparticles. Surface morphology analysis revealed the growth of nanorods with 150 nm in length and 30 nm in width. The crystallite size and micro-strain due to the effect of doping is calculated from the observed broadening of the XRD peaks using Williamson-Hall equation by following three models such as uniform deformation model (UDM), Uniform stress deformation model (USDM) and uniform deformation energy density model (UDEDM). The difference in the calculated strain values by three different models may be due to the anisotropic nature of SnS. The observed strain value can be related with the intrinsic defects present in the sample and also revealed the polycrystalline nature of the prepared nanoparticles.