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Sonobi Launches People-Based Ad Marketplace to Compete with Walled Gardens

Advertisers worried about losing access to customer data because of Facebook, Google, Amazon and other walled gardens have a new friend: ad tech company Sonobi, which just opened a public beta of an addressable marketplace reaching up to 225 million individuals across premium online publications. The marketplace uses a “People Based Identifier” that can track individuals across multiple environments, offering scale and precision to match the walled gardens. The marketplace is integrated with major programmatic buying platforms.