The combined use of statistical survey and administ rative data is largely widespread to maximize their respective usefulness: unfortunately data sources are often hard to integrate due to errors or lacking informat ion. Record linkage techniques are a multidisciplinary set of methods and practices aimi ng to identify the same real world entity, differently represented in data sources. Re cord linkage is a complex process but it can be decomposed in separate phases, each of them requiring a specific technique. To deal with such a complexity, we propose RELAIS (REcord Linkage At IStat), an open source toolkit based on the idea of choosing the mo st appropriate technique for each phase and of dynamically combining them so as to build a record linkage workflow , given specific application constraints and input da ta features.