Competition law frameworks play a crucial role in regulating market competition, promoting fair trade, and ensuring consumer welfare. East African Community (EAC) countries have initiated efforts to harmonize their competition laws, reflecting regional integration aspirations. The research methodology involves a systematic review of legal documents, secondary data analysis, and comparative law studies. Expert interviews were conducted to gather insights from relevant stakeholders, including government officials, private sector representatives, and civil society organizations. Tanzania's competition law framework is characterized by strong regulatory oversight but faces challenges in enforcing compliance effectively due to limited resources and enforcement capacity. The comparative analysis reveals significant disparities in the implementation of competition laws across EAC member states. Tanzania stands out for its proactive approach, yet it lags behind in terms of consistent application and public awareness campaigns. To enhance compliance and effectiveness, there is a need to improve enforcement mechanisms, increase public education efforts, and harmonize legal frameworks with regional initiatives. Competition Law, East African Community (EAC), Tanzania, Harmonization, Regulatory Framework