Episode 126 of The Data Business Podcast explores why data teams are adopting data clean rooms — secure environments where multiple organizations can analyze shared data without exposing raw records. Lucas and Luna examine the regulatory drivers behind the trend, including GDPR, CCPA, and emerging AI governance rules. They walk through a concrete example: how a retail chain and a credit card network used a clean room to run a joint loyalty analysis without ever exchanging customer PII. The episode also covers the technical architecture — differential privacy, query logging, and audit trails — and the business trade-offs: more privacy compliance, but slower queries and higher operational overhead. Lucas and Luna discuss why clean rooms are becoming a standard tool for data teams that work with sensitive data across partners, especially in advertising, healthcare, and financial services. They also touch on the productization of clean rooms by major cloud providers and the debate about whether startups can compete with built-in platform features. A practical, no-hype conversation about balancing data utility with privacy obligations.