The competitiveness of Catalan agri‐food cooperatives is studied from a new point of view, their internationalization and specifically the effects on internationalization due to the adoption of quality certifications. Most of the previous research focuses on organizational, economic and commercial aspects, and there are few works linking both fields. Therefore, the purpose of this research is to analyse the behaviour of the relationship between internationalization and certification. For this purpose, the non‐parametric Mann–Whitney U test for two independent samples and boxplot analysis were used. The results of this research show a positive relationship between different certification systems and internationalization. Empirical evidence was found: Exporting cooperatives that adopt ISO 9001 or a production system certification have a higher export intensity and geographical diversification than those that do not adopt it.