Unified ID 2.0
Ventura, California, United States · Founded 2021
51-200 employees · NASDAQ:TTD
Unified ID 2.0 (UID2) is an open-source identity framework designed to enable publishers, advertisers, and digital advertising platforms to establish and maintain user identity across the open internet, leveraging encrypted email and phone number data to deliver a privacy-conscious and accurate identity standard.
Where they sit
Stack tier: Ecosystem Services (A)
Identity ResolutionPrivacy-First Advertising
Leading open-source cookie alternative for programmatic advertising, adopted by 50%+ of US programmatic ad spend by mid-2025 and backed by The Trade Desk
Ownership
Parent: The Trade Desk