This face recognition company's software is used in public spaces like stadiums, and matches 20 million faces per second. It can track people as they move from store to store, and alert security personnel.

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This CIA-backed multi-billion dollar company that offers military grade data-analysis, surveillance and prediction to governments, police, cities and companies. The are considered to be as powerful as Google, but the creepy thing is: you're likely never heard of them.

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