Is identity resolution the same as fingerprinting?

No. Fingerprinting is one probabilistic technique that derives an identifier from device characteristics without storing anything in the browser. Identity resolution is the wider process and in analytics tools it is mostly deterministic, based on the product's own user ID; fingerprinting is legally restricted in many jurisdictions.

Identity Resolution

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Updated Jul 11, 2026 Shahin editorial 3 min read

PronunciationEN/aɪˈdentɪti ˌrezəˈluːʃən/

Identity resolution is the process of deciding which identifiers such as a cookie, a device, a login and a CRM record belong to the same person and should collapse into one profile.

Two mechanisms exist. Deterministic matching relies on a shared, product-owned key such as a user ID and is certain, while probabilistic matching infers a match from signals such as IP address, user agent and timing and is a statistical guess. The result is stored as an identity graph, a cluster of identifiers with one canonical ID chosen as the join key. The term carries two senses: in product analytics it usually means stitching pre-login and post-login activity inside a single product, while in a customer data platform it means matching one person across channels and vendor systems. Probabilistic matching is the risky half, because it inflates cross-device user counts in a way that cannot be verified afterwards.

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