Tosmana is a software tool designed for Qualitative Comparative Analysis (QCA), which aids researchers and analysts in examining complex social phenomena through case-oriented comparative methods. The tool facilitates the handling of crisp-set, multi-value, and fuzzy-set QCA, allowing users to systematically assess and compare different cases to uncover patterns and causal relationships. Tosmana offers a user-friendly interface that supports data input, analysis, and visualization, making it accessible for both experienced researchers and newcomers to QCA. It is widely used in the social sciences for research that requires in-depth comparative analysis.