RampID

RampID is LiveRamp's people-based identifier: a pseudonymous ID that links a person's offline records and online devices, used for ad targeting and measurement without third-party cookies.

RampID is built on LiveRamp's identity graph. LiveRamp's documentation says the graph matches offline data, such as name, postal address, email and phone, to individuals using exact links rather than guesses. It then links devices to those people with data from match partners, and turns the offline record, called an AbiliTec Link, into an online RampID (LiveRamp, RampID methodology, accessed 9 November 2026). LiveRamp says it puts accuracy ahead of reach and has less scale than vendors that rely on probabilistic methods.

On the open web, RampID usually travels inside an encrypted envelope. In Prebid.js, the LiveRamp module, once called IdentityLink, stores the envelope as idl_env. A logged-in envelope comes from LiveRamp's Authenticated Traffic Solution (Prebid.org, accessed 9 November 2026). Each platform with a LiveRamp integration decodes the envelope into its own RampID space, so partners do not share one raw ID.

RampID also comes in a household version, built by grouping people seen living together. That version suits connected-TV planning.

Example: A publisher's login page sends a reader's hashed email to LiveRamp's Authenticated Traffic Solution. The returned envelope is stored as idl_env, passed in the bid request's user.eids array, and decoded by a DSP with a LiveRamp integration, which can then match it to an advertiser's customer audience.

Related terms: hashed email, household graph, UID2, ID5 ID, identity resolution.

Authoritative source: LiveRamp, "RampID Methodology" documentation (accessed 9 November 2026).