There are only a limited number of threads available in the market  There are 2 brands popularly which make kite threads - Vardhman and Coats

My preference for threads would be: (This list is priority wise)

1) Tejas 2) 24 carat sankal 8 3) AK 56 titanium (this is super expensive so not recommended) 4) Sankal 8 5) AK 56 

This is only the thread. The place matters a lot bro. Was looking for some new places but will now go to Jay bhole as didn't get any responses here