Before joining in any institute/ college you have to check these following parameters:

1. Their track record
2. Fees
3. Material
4. Experience of faculty

Let us start with their track record. Many well known junior colleges like Sri Chaitanya, Narayana or IIT Ramaiah have been around since I guess the turn of the century. Just because they have been around for a long time, it does not mean they have a better track record or a better success rate. There is this saying that "Rome was not built in a day". It took  approximately 1,009,491 days to build Rome. The same way for success to be achieved in any competitive exam., there should first be a strong foundation which most certainly starts in school. Here are some of the famous coaching centres in hyderabad.

1.Allen Career institute. The JEE MAIN 2019 rankers took coaching in Allen Career insitute KOTA. There is a branch in Hyderabad too. Below is the article which says the same.

https://www.hindustantimes.com/education/jee-main-2019-result-six-out-of-top-15-toppers-are-from-kota-institutes/story-l45yanWv86tNHN4mjmyAoL.html

Click on the below link to view the top coaching institutes in India

https://www.quora.com/What-is-best-IIT-JEE-coaching-in-Hyderabad

 https://www.justdial.com/Hyderabad/IIT-Tutorials/nct-10988433