According to some surveys conducted by various academies about which is the best iit jam online coaching physics, below is the list of the coaching centres rank wise:

GATE IIT Gate Indian Institute of Tutorials
Physics by fizics
Dips
Success Academy
Vidyaalankar and more.

GATEIIT tops the list as it has shown amazing results for the past 8 years. It has the best teaching faculty and records the highest and longest teaching hours and training. It is best known for its personal attentional classes. It keeps track of all students' performance and has personalised doubt clearing sessions and so it is one of the best coaching centres with highest success ratio in India.