Hello!

I am not sure whether the Udemy is better or Unacademy is better. But you can always add Udemy certificate to your resume (not all course certificates but certain courses have valid certification). All I know about Udemy is that, they have wonderful course material at a extremely low cost. If you have interest in that particular course then Udemy gives you a nice platform to learn. This is not for promoting but I have personal experience with that Udemy material.

ALL THE BEST. Hope the answer was of some help.

Thank You