How to Deanonymize Website Visitors Without Cookies (Five-Layer Framework)
Cookie-based deanonymisation is dying on a multi-quarter clock. Per industry consensus across browser-engine roadmaps and regulator guidance, third-party cookies are restricted by default in most major browsers, first-party cookies face shorter lifetimes, and signed-in identity is fragmenting across enterprise SSO. The deanonymisation stack that worked in 2022 will not work in 2026. This guide walks the five-layer cookieless deanonymisation framework that B2B teams actually run today, with coverage bands, build effort, and the trade-offs of each layer.
