This paper presents a comparative analysis of the quality of democratic accountability mechanisms in Latin America. It begins by reviewing the concept of democratic accountability quality and its operationalization by means of factor analysis. As a result, three quality indicators are identified corresponding to the types of accountability that prevail in the literature: horizontal, electoral and social. The study reveals considerable differences among the Latin American democracies. Set out below is an exploratory analysis of the factors explaining these differences. The analysis yields three main conclusions. First, it confirms the usefulness of the model. Second, the quality of each type of accountability is explained by specific factors: no one factor explains all three cases. Third, a different logic behind social accountability mechanisms is detected as compared with the other two types of accountability mechanisms.