Manchester United midfielder Pogba has grown in confidence and form during France's run to the World Cup final.
Umtiti said: "I've known him for many years, he's always been a leader, he has that in him. He is very listened to in the group.
"His game has evolved during the competition. He knew how to challenge himself and he helped the group move forward. On the field he did a lot of work and worked for the collective. He helped everyone.
"We needed him for this competition and it is on this point that he has really progressed. Off the field, he gives advice to everyone, from the youngest to the oldest."