Digital Lexicon Hub

A controlled environment where two or more parties analyze combined datasets under agreed rules without exposing each other's raw records.

Clean rooms let a brand measure campaign reach and overlap with a retailer, publisher or platform without handing over customer lists, which keeps partnerships possible as cookies and device IDs become less available.

A retailer and a CPG brand create an AWS Clean Rooms collaboration, each linking a table of hashed emails and purchases. Analysis rules allow only aggregate queries with a minimum group size, so the brand learns that 18% of exposed shoppers bought its product.

A clean room reduces exposure but does not make data anonymous by default; poorly set rules, small segments and repeated queries can still reveal individuals. Each party still needs a lawful basis and contracts for the matched personal data.

Participants link their data to a shared workspace while it stays in place or encrypted. Joins run on agreed keys such as hashed emails, and analysis rules or approved query templates limit what can be asked. Outputs pass aggregation thresholds or differential privacy noise before release. Google Ads Data Hub, Amazon Marketing Cloud and AWS Clean Rooms are common examples, often fed from a Customer Data Platform (CDP) holding First-Party Data and Personally Identifiable Information (PII).