HoundDog is a platform designed to simplify compliance with the Payment Card Industry Data Security Standard (PCI DSS) by automating various aspects of data flow monitoring and management. It helps organizations meet PCI DSS Requirement 1.2 by continuously tracking how cardholder data (CHD) and personally identifiable information (PII) move through systems using application source code as a reference, ensuring proactive monitoring before code deployment. To comply with Requirement 3.1, HoundDog offers proactive tracking of PII across different environments, using a static code scanner to prevent accidental data exposure and maintain an up-to-date inventory for audit preparedness. Additionally, the platform addresses Requirement 12.8 by automating the monitoring of third-party processors, allowing organizations to visualize and manage data-sharing practices to prevent unauthorized access and compliance violations. Through these capabilities, HoundDog provides a proactive approach to managing PCI DSS compliance, reducing the risk of breaches and non-compliance penalties while ensuring sensitive data is protected.