RELAIS (Record Linkage At Istat) is a toolkit for record linkage. RELAIS allows combining techniques for each of the record linkage phases, so that the resulting workflow is actually built on the basis of the requirements of the application at hand. More specifically, the RELAIS toolkit is composed by a collection of techniques for each record linkage phase that can be dynamically combined in order to build the best record linkage workflow. RELAIS has been implemented in Java and R and has a database architecture (MySQL).