which is best vedantu or Allen kota digital for jee main preparation

Hello there ,
Well if you are planning to do things online them I think that vedantu would be a better choice as it had established itself as a online learning platform since a long time. Moreover I have myself experienced that teachers in vedantu really makes learning fun.
All institutions like VMC , FITJEE ,Allen are a better choice if you are planning to join a classroom course.
I hope this helps.
Regards
Madhur

If we see the previous years records Allen has definitely given ranks and a number of students for iits as well as nits. Since vedantu is new in the market but it is also giving great results, it's definitely competing allen with it's selection. But I personally suggest you to choose Allen since it has little bit assurance more than that of vedantu.