Deanonymization

The process of identifying previously anonymous individuals by connecting their activity to known identity data.

Definition

Deanonymization (also spelled de-anonymization) refers to techniques used to identify individuals who were previously anonymous. In the context of website tracking, it means matching anonymous browsing sessions to real identity information such as names, email addresses, and company details. This is achieved through various data matching techniques including cookie matching, device fingerprinting, and probabilistic identity resolution.

Why It Matters

For B2B companies, deanonymization transforms website analytics from aggregate traffic numbers into actionable sales intelligence. Instead of knowing that 1,000 people visited your pricing page, you can know exactly which individuals and companies were there—enabling personalized, timely outreach.

Examples

Matching a browser cookie to a known email address from a data provider
Using IP-to-company mapping combined with behavioral signals
Resolving anonymous sessions across multiple devices to a single identity

How Bullseye Helps

Bullseye uses compliant deanonymization techniques to match your website visitors to our database of over 200 million B2B contacts. We only process US traffic and maintain opt-in permissions, ensuring GDPR and CCPA compliance.

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