In my opinion some of the best online educational platforms are: Byju's, Vedantu, Meritanation, toppr, Khan academy etc But if I have to choose best one, I would say there is neck to neck competion between 2 platforms- Vedantu and Byju's.

On one hand Byju's provides you with some amazing graphics in their recorded videos. They try to enhance your imaginative skills and teach you practical applications which makes studying fun and engaging.

Whereas Vedantu provides you best live tutoring sessions in which you can directly interact with one of the best tutors around country and can solve your doubts in no time.