IELTS

IELTS is the International English Language Testing System. It measures ability to communicate in English across all four language skills – listening, reading, writing and speaking – for people who intend to study or work where English is the language of communication.
Since 1989, IELTS has been proven and trusted worldwide to provide a secure, global, authentic and customer-focused test which measures true to life ability to communicate in English. Over 3800 educational institutions, government agencies and professional organizations across 120 countries around the world recognize IELTS scores as a trusted and valid indicator of ability to communicate in English.
With over 500,000 tests taken every year, IELTS is one of the fastest growing English language tests in the world, and sets the standard in integrity, research and innovation.

TOEFL (iBT)

The Test of English as a Foreign Language™ (TOEFL®) measures the ability of nonnative speakers of English to use and understand English as it is spoken, written, and heard in college and university settings.
The TOEFL test is offered in different formats depending on a test taker's location.
The TOEFL Internet-based Test (TOEFL iBT) tests all four language skills that are important for effective communication: speaking, listening, reading, and writing. The test helps students demonstrate that they have the English skills needed for success.