Hello Praful,

There are institutes which are best of the bestest. 

If you want free coaching, then you can go for a Jamia Milia Islamia. They provide free coaching for final year or graduate students. For grabbing that opportunity, you have to sit for a entrance exam.

Except this,

Some institutes are Vision IAS, Chankya Academy, ALS IAS etc.

Good luck

Dear Praful,

that great you apply for UPSE very few people have guts for applied or think about it.

getting preparation is a hard path and some case good coaching fee is even difficult.

So the solution to this problem is in your hand. Yes, your smartphone.

Today most of the online coaching for preparation for UPSE is much cheaper and some cast it free of cost. And you get some great teacher which help you a lot of help you achieve your goal.

and you get much more content as compared to the offline course.

maybe you should try I hope it helps you.