Hey,

To be very honest it totally depends on how good your grasp the knowledge given to you by the coaching centre. If you are good with that you will shine in any coaching.

But as you have asked the review so I will help you with that. Unacademy is no doubt a superb platform which have came out good in various study fields. I have not heard about Allen Chennai much but Allen Kota is very good.

As you see the classes are going online and we don't know for how long they will be online,, Sono will suggest you to go with Unacademy plus as they are one of the best online coaching classes till date. The faculty and the results are marvelous in such a short span of time.

Hope that helps.

Thank you.