ID5
London, United Kingdom · Founded 2017
51-200 employees · N/A
Sourced & current · updated Oct 5, 2026Website
ID5 is an adaptive identity technology company that connects fragmented signals across environments to make digital advertising addressable and measurable across channels.
Where they sit
Stack tier: Ecosystem Services (A)
Identity ResolutionPrivacy TechnologyData Management Platform
Leading independent, neutral identity infrastructure provider for the open web, widely adopted across publishers, SSPs, DSPs, and data platforms globally.