And the Toffees boss reckons Aston Villa’s relegation allowed them to swoop for the under-the-radar star.
Gueye, 26, arrived at Goodison Park in a £7.1m deal this summer after a low-key debut campaign in the Premier League with Villa.
But he has been one of the Toffees’ star men so far this season as they look to continue their unbeaten start to the Premier League season today at Bournemouth.
Koeman said: “He can have the same impact as N’Golo Kante because he plays in the same important position in the team.
“He is an important player in how we like to press, on second balls and in the energy he shows.
“To know a player properly you have to work with them every day and I’m very happy with how he is acting and playing, not only without the ball but with the ball too.