PurposeThe present study aims to examine the impact of relational communication, operationalized in terms of information sharing, quality and frequency of information, on buyer's trust and relationship satisfaction in a buyer–vendor relationship. The study also tests the mediating role of trust and the moderating role of relationship commitment in relational communication and satisfaction relationship.Design/methodology/approachThe data for the study were collected through a questionnaire survey from 321 managers of the different firms who were directly or indirectly involved in making procurement or purchasing decision in the firm and were familiar with the firm's supplier relationships.FindingsRelational communication was found to be positively related to relational satisfaction and trust partially mediated this relationship. Further, relationship commitment moderated relational communication-satisfaction relationship, such that the positive affect of relational communication on relational satisfaction was accentuated when buyer experienced higher relationship commitment towards the supplier.Research limitations/implicationsUsing single source, self-reported questionnaire data and cross-sectional research design are the limitations of this study. Studies in future should consider a dyadic perspective. The study outlines the need to explore investments and strategies in enhancing relational communication in buyer–vendor relationships.Originality/valueAnchored in theoretical foundations of social exchange theory, the study integrates and tests behavioral aspects of buyer–vendor relationship. Testing an integrated model with direct and indirect effects of relational communication on relationship satisfaction in buyer–vendor is a significant contribution of the research. The study also contributes by examining relational exchanges in buyer-vendor relationships in India, an underrepresented context in buyer–supplier relationship (BSR) literature.