What Is Identity Resolution?

Identity resolution is the process of connecting fragmented data points — cookies, device IDs, email addresses, CRM records, and behavioral signals — into a single, unified view of each individual. It is the foundation that makes every other marketing capability possible: targeting, attribution, personalization, and measurement.

Why Identity Resolution Matters

90% of website visitors are anonymous. They browse your content, research your competitors, and evaluate solutions without ever filling out a form. Without identity resolution, these visitors — many of whom are active buyers — are invisible to your marketing and sales teams.

Identity resolution closes that gap. It connects anonymous digital behaviors to real people, giving you the ability to see who's on your site, what they're researching, and how to reach them.

Deterministic vs. Probabilistic Matching

Deterministic matching links data points using verified, unique identifiers — typically hashed email addresses matched against an identity graph. When a visitor is resolved deterministically, you know with certainty who they are.

Probabilistic matching uses statistical models to infer identity based on behavioral patterns and IP data. It's faster to deploy but inherently less accurate, with match rates that degrade over time as signals change.

Delivr.ai uses deterministic matching against a graph of 4.5 billion verified email records, achieving resolution rates above 50% — roughly double the industry average.

The Identity Graph

An identity graph is the data structure that powers identity resolution. It maps relationships between identifiers — email addresses, device IDs, cookies, phone numbers, and behavioral signals — creating a persistent profile for each individual.

Delivr.ai's identity graph tracks 15 billion activities daily across 1.4 billion devices matched to 1.1 billion email addresses, covering 98% of the total addressable market in North America.

Privacy and Compliance

Identity resolution must operate within consent-forward frameworks. Delivr.ai maintains GDPR, CCPA, and IAB TCF compliance. All data sourcing follows permissioned, deterministic methodologies — no probabilistic guessing, no scraped data, no consent-questionable sources.