This study aims to conduct a focused investigation into the impact of implementing blockchain technology on the value chain of businesses and to analyze how this technology contributes to achieving competitive advantage. The adopted methodological approach is qualitative in nature, centered around the analysis of a specific case study within the agri-food sector. The findings from this research clearly indicate that blockchain technology has a significant influence on the value chain, with particularly noteworthy effects in the context of marketing and sales activities. Specifically, a positive effect is observed in terms of safeguarding the competitive advantage of companies that adopt blockchain. These results provide a significant contribution to the understanding of the role and implications of blockchain technology in the business context, with relevant implications for researchers and for management.