The Bass model of diffusion has been widely applied to forecast the diffusion of products prior to launch; instead, studies on services diffusion are still at the embryonic stage. This work presents an empirical analysis of the diffusion of an Italian travel start-up. Firstly, analogy was used to find similar services to the analyzed one in order to estimate the Bass parameters by simulating a case in absence of data. These parameters were then compared to the ones derived by NLR (Non-Linear Regression) techniques. Finally, being the sales history of travel agencies strongly characterized by seasonality, the model developed by Guidolin and Guseo (2012) was applied.