ID5.io
Technology, Information and InternetEngland, United Kingdom51-200 Employees
ID5.io develops identity solutions for digital advertising, focusing on privacy-conscious addressability across media properties, devices, and channels. Its Adaptive Identity platform continuously learns and adapts to maintain consistent recognition as audiences navigate different environments. This capability supports media owners in sustaining revenue, enables advertisers to assess campaign performance, and helps platforms improve the value derived from data and inventory. Based in London, England, ID5 was founded in 2017 and operates as a mid-sized technology and information services company. In January 2026, Rakuten TV Enterprise announced a partnership with ID5 to support cross-device campaign tracking and richer audience activation.