Institution
Purpose of the exam
Website
Cambridge English
Cambridge English Qualifications certify practical English ability from basic everyday communication through high-level academic and professional English. Linguaskill is an online, on-demand exam that certifies English from B1 to C2.
https://www.cambridgeenglish.org/exams-and-tests/
British Council — Aptis ESOL
Aptis ESOL provides official proof of English proficiency. General assesses broad English ability, Advanced distinguishes higher levels, and the Teachers version uses education-related content.
https://www.britishcouncil.es/examenes/aptis
British Council / IELTS
IELTS assesses English for study, work and migration. Academic is aimed at higher education, General Training at work or migration, and IELTS for UKVI at UK visa requirements.
https://takeielts.britishcouncil.org/what-is-ielts
ETS — TOEFL iBT
TOEFL iBT measures English skills used in academic settings, including reading, listening, speaking and writing, and is intended particularly for university study and admissions.
https://www.ets.org/toefl.html
ETS — TOEIC
TOEIC measures English communication skills needed in the workplace. Its tests cover workplace listening, reading, speaking and writing proficiency.