Identity Graph

An identity graph is the map of everything that resolves to one customer. A single person reaches a business through many identifiers: several email addresses, multiple devices, a social login, separate account IDs across products. The identity graph links those nodes, and the relationships between them, into one connected view so the business can recognize the same customer wherever they appear.

The links are built two ways. Deterministic matching joins identifiers the customer has explicitly tied together, such as logging in or linking a social account. Probabilistic matching infers a connection from signals like shared devices or behavior. The deterministic, authenticated graph is the more durable and defensible of the two, because it rests on first-party relationships the customer agreed to rather than inference.

This is where CIAM and marketing meet. The authenticated identity graph a CIAM platform builds, from real logins and explicit account links, is the trustworthy core that a customer data platform or marketing stack then activates. It is the structural result of identity resolution, and every use of it is governed by the consent attached to its nodes, which is what separates a compliant first-party graph from the cookie-based graphs that privacy regulation is steadily closing off.