Where are essai products made? Essai, Inc. is located in Fremont, CA, United States and is part of the Navigational, Measuring, Electromedical, and Control Instruments Manufacturing Industry. Essai, Inc. has 211 total employees across all of its locations and generates $60.01 million in sales (USD). (Sales figure is modelled).How many employees does essai have? Essai, Inc. has 211 total employees across all of its locations and generates $60.01 million in sales (USD). (Sales figure is modelled). There are 65 companies in the Essai, Inc. corporate family.Does advantest own essai? In 2020, Advantest completed the acquisition of U.S. company Essai, Inc., a leading supplier of semiconductor final-test, system-level test sockets and thermal control units. Essai, which is headquartered in Fremont, California, is a wholly owned subsidiary of Advantest America, Inc., Advantest Corporation’s U.S. subsidiary.