This study examines the influence of entrepreneurial behaviors on startup performance in Dar es Salaam, Tanzania. Grounded in Entrepreneurial Event Theory (EET), this research employs a cross-sectional survey of 244 startup owners, analyzed through descriptive and regression analysis. The findings reveal that competitive aggressiveness is the most significant predictor of startup performance, followed by innovation and proactiveness, while risk-taking has a modest but significant effect. These results extend EET by demonstrating that perceived feasibility and desirability drive specific entrepreneurial behaviors in resource-constrained environments. Practically, the study highlights the need for startups to adopt data-driven competitive strategies, proactive innovation approaches, and structured risk-taking models. Additionally, it provides policymakers with insights to design startup-friendly policies and funding mechanisms that foster sustainable entrepreneurial ecosystems. The findings contribute to entrepreneurship theory by contextualizing the behavioral dynamics of startups in emerging markets, paving the way for future research on industry-specific entrepreneurial patterns.