Wolrd TESOL Academy — Perfect Certification for New Teachers

Compared to many other TESOL training agencies, I must say World Academy is the best for New Teachers. At least it's much cheaper.
First of all, compared to TKT textbook, World Tesol Academy's 120h course is compact and concise, but covering various aspects of how to teach. And you don't have to take an offline exam, so it's also cost-saving. However, since you can take multiple times to get a higher record of the quiz, and you don't need to give demo class or write any essays, I would say it's easier to pass the exam, thus to say, you won't have production training neither receive any feedback of it. So it's not as challenging as to pass CELTA. So I think it's your best first teaching certification.
Moreover, even if you have passed TKT, you can still learn something from TESOL. For example, you will learn how to teach online which is illustrated in a whole module but not mentioned much in TKT. Compared to some TKT textbooks, I would say TESOL is more updated.
Last but not least, you always have a tutor to ask if you have any questions. This is the most surprising part of the course. As a new teacher, you may encounter many problems while teaching, such as class management. Personally, I asked three practical questions which were not related to the exam, but I still received very detailed and helpful suggestions. I think this is the most valuable service for new teachers.
However, if you're an experienced teacher, I think CELTA or DELTA would be better choices.