ABSTRACT This article examines the impact of civic action on enhancing accountability and combating corruption in political financing, focusing on two civil society initiatives in Uruguay. The initiatives aimed to digitize and map information on funding received by political parties and politicians in the 2009 and 2014 elections, presenting their findings through interactive online platforms. The paper engages theoretically with the literature on the dimensions of accountability and contributes to understanding the challenges faced by civil society organizations in promoting political financing accountability even in full democracies, a topic largely understudied. Findings highlight concerns beyond electoral authorities’ well-known resource constraints in detecting illicit political donations and spending in Uruguay. The paper shows that transparency is not enough to reduce corruption. We argue that for political finance accountability to be effective, it must encompass bottom-up, horizontal, and diagonal dimensions. The analysis suggests the need for complementary measures, such as digital solutions for reporting and disclosing political finance information, along with active horizontal and bottom-up oversight mechanisms. The article draws on qualitative analysis based on documentary research and 19 interviews with activists, academics, journalists, developers of the initiatives, and public officials involved in political finance regulation.