Wikipedia
Sojern
Sojern is a provider of a data-driven traveler marketing platform that utilizes programmatic buying and machine learning technology. Sojern partners with travel companies including airlines, OTAs, hotels, and rental car companies to collect anonymized (non-personally identifiable) traveler profiles. The company utilizes this data to target travelers and deliver marketing messages across media channels. Sojern is currently headquartered in San Francisco, CA with key offices in New York, Omaha and London.