Deposit-taking Savings and Credit Cooperative Societies (SACCOS) in Kenya have faced significant challenges due to intense competition and declining customer numbers, which underscores the need for further investigation into relationship marketing strategies. A key research gap is the role of digital platforms in moderating the effectiveness of these strategies and their impact on customer loyalty. This study aimed to evaluate how digital platforms influence the relationship between relationship marketing (RM) and customer loyalty among SACCOs in Western Kenya. Using Relationship Commitment, Social Exchange, and Commitment Trust theories, the research focused on 23 SACCOs with 37,137 customers and surveyed 396 respondents, including prior pilot study. Descriptive and correlational research designs were used, with data collected via self-administered questionnaires and systematic sampling. Analysis with SPSS assessed validity and reliability, employing descriptive statistics and inferential methods such as Pearson’s Correlation, Simple Linear Regression, and Hierarchical Regression Analysis. Assumption tests confirmed that the research data met normality, linearity, homoscedasticity, and multicollinearity criteria, with a response rate of 87.63% and significant correlations (p<0.05) among variables. Digital Platforms were found to contribute significant moderating role on the link between Relationship Management and Customer Loyalty (p<0.05), emphasizing features like interactivity, personalization, and trustworthiness. The results suggest that in order to enhance customer experience, SACCOs should allocate resources towards the development of user-friendly digital platforms, utilize data analytics in targeted marketing efforts, so as to enhance engagement with the community via online channels. Moreover, it is crucial for SACCOs to prioritize personalized service, establish trust, and strive for continuous improvement, while taking into account regulatory revisions, in order to maximize the effectiveness of digital platforms within the financial sector.