Cookieless tracking

Cookieless tracking is the umbrella term for measurement methods that don't depend on third-party cookies: first-party data collection, server-side event streams, hashed-identifier matching (like enhanced conversions), click-ID joins, and modeled conversions filling consent and coverage gaps. It's a portfolio of mechanisms, not a single replacement technology.

#Cookieless doesn't mean trackingless, or even cookie-free

In practice, "cookieless" almost always means third-party-cookieless. Most cookieless stacks still use first-party cookies for session and visitor continuity. What changed is that cross-site identifiers written by ad servers stopped being dependable, so measurement shifted to what you can observe and match yourself. Deterministic matches (a click ID captured into your CRM, a hashed email matched to a signed-in account) replace ambient cross-site recognition, and modeling fills what consent and coverage gaps remove. Your reported numbers become part observed, part modeled, and knowing which share is which becomes an operating skill rather than a nicety.

Buron's stack is cookieless in exactly this sense: a first-party pixel, matching on click IDs and hashed identifiers, and monitoring over what's observed versus modeled.

The full inventory of what still works (mechanism by mechanism, with the cookie-lifetime table that motivates it) is Tracking after third-party cookies: what actually still works. The durable substrate is First-party data, the transport is Server-side tracking, and Conversion tracking & signal quality maps the wider territory.