This systematic literature review article was developed aiming at identifying the main models of integrated management systems (IMS) for small, medium and large companies; this by means of a bibliometric analysis that made it possible to determine which are the models used for the integration of systems in each of the types of companies analyzed. IMSs are understood as a single set of interconnected processes wherein two or more management systems are included; These were explored through qualitative and descriptive research, in the search, collection, debugging and analysis of information from the Science Direct, Scopus, Redalyc and Google Scholar databases. Based on the results, it was found that integration strategies are generaly designed instead of being focused on organization sizes, that is, they are implemented for any size of company. As conclusions, it was evidenced that they focus on sectors such as energy, fuels, ceramics, food, medicine, metalworking, among others.