Runs online opinion polls on a variety of issues internationally. They have pools of people that they ask survey questions, and also pull in data from social media and other sources to help brands understand their image. They are starting to get into the audience segmentation business too. YouGov is quite large and has acquired a number of related companies.
Surveys, Census, Election Results, ONS population estimates, TV Audience Measurement, Radio Listenership, Print Readership, Browsing Data, App Usage Data, Facebook, Twitter
United Kingdom, United States, Australia, Greece, France, Norway, Singapore, Malaysia, Romania, Finland, Sweden, Denmark, Thailand
Uses machine learning to forecast how additional people would answer a survey, a method they call "SurveyExtender". The examples they give pertain to the United States and they have multiple companies incorporated there, so it is likely they work there. Some of the same people involved as Cambridge Analytica.