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Uncovering Webloc: An Analysis of Penlink’s Ad-based Geolocation Surveillance Tech - The Citizen Lab

Uncovering Webloc: An Analysis of Penlink’s Ad-based Geolocation Surveillance Tech - The Citizen Lab

Published: April 11, 2026 · Citizenlab.ca

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Key Findings

Webloc is a global geolocation surveillance system that monitors hundreds of millions of people based on data purchased from consumer apps and digital advertising. It was developed by Cobwebs Technologies and is now sold by its successor Penlin…