Authors - Lucian Julio Felix da Costa, Claudio de Souza Baptista, Andre Luiz Firmino Alves Abstract - Auditing public procurement processes is essential to ensure transparency, accountability, and efficiency in the management of public funds. However, the increasing complexity of procurement procedures poses significant challenges for auditors, particularly regarding the timely detection of pricing irregularities. This paper presents a software tool for price comparison designed to support the identification of overpricing and underpricing in public works procurement. The proposed solution leverages semantic retrieval and historical price comparison techniques to analyze procurement data and integrate up-to-date market information. Additionally, the application provides interactive visualizations and semantic retrieval mechanisms to support auditors during procurement price analysis activities. The expected contribution of this study lies in improving the effectiveness and accuracy of procurement oversight, strengthening financial analysis processes, and contributing to the prevention and deterrence of fraudulent practices among bidders.