[1] It is the product of EF Education First, a global language training company, and a team of language assessment experts including Lyle Bachman, Mari Pearlman, and Ric Luecht.

EF compares the EFSET's accuracy to the most widely used high stakes standardized English tests: TOEFL, IELTS, and Cambridge International Examinations.

[3] EF Education First initially intended to build the EFSET for internal use.

Soon, the company realized it could gain branding benefits from releasing a robust, testing tool for any English learner to use.

[4] The initial public launch of the EFSET in 2014 was the result of a 3-year process, which included 15 months of formal trials involving 14,500 students.