Regardless of the type and level of maturity of the sector of economic activity, the adoption and implementation of the principles of quality, understood in its broadest sense, are now a must for all companies that pursue objectives of competitiveness based on the rationalization of processes and the continuous search for new business opportunities. Through a series of company testimonials, presented in "De Qualitate - Rivista Italiana della Qualità" and duly updated by the authors for various reasons of topicality, Competere con la Qualità proposes to contribute to removing many of those prejudices, still deeply rooted, that hinder the introduction and development of quality improvement projects, demonstrating how they can be effectively applied in heterogeneous contexts from the point of view of both size and commodity.