ID5 Technology Ltd

What we know about this broker

Confirmed 2026-06-16. ID5 Technology Ltd is a UK/EU-headquartered ad-tech identity graph company (offices at 8 Devonshire Square, 6th Floor, London EC2M 4YJ) registered as a California data broker. Primary opt-out mechanism is the Privacy Preference Center at id5-sync.com/privacy/ which accepts email address (hashed for suppression list matching) or operates via browser cookie. GPC signals are honored as valid opt-out signals. For full DSAR (deletion/access), email [email protected]; escalation to [email protected] within 5 business days. Authorized agents are accepted conditionally: automated opt-out tools require no proof, but sensitive requests (access/deletion via agent) require signed written permission from the data subject. region=multi because the company serves both EU/GDPR and US/CCPA jurisdictions under a single flow; GDPR-Art17 is asserted as the stronger hook. Opt-outs propagated to partners every 30 minutes; deletions every hour.