Clean Room Measurement: Privacy-Safe Private Joins

Privacy-safe match tests and outcome measurement

Clean rooms are procurement tooling: they let buyers test match rates and measure outcomes with governed joins while keeping identifiers protected. The goal is a decision-grade join — not a platform name. In practice, clean rooms support pre-license seed matches and post-activation exposure→outcome measurement with aggregation floors and documented governance.

What buyers use clean rooms for

• Seed match testing (10K–100K hashed identifiers) to measure usable resolution.
• Outcome measurement (exposure → outcome) with defined attribution windows and dedupe logic.
• Privacy controls: hashed IDs, aggregation floors, retention/deletion SLAs.
• Governance: permitted uses, exclusions, and audit-ready provenance artifacts.

For a broader buyer guide, see clean rooms in 2026 and the pilot process workflow.