Zak Arogundade (born October 23, 1994), better known as ECCO2K, was a Swedish rapper, music producer, fashion designer, graphic designer, and filmmaker based in Stockholm. He is a close collaborator with Yung Lean, Yung Gud, and Yung Sherman who make up the Sad Boys crew.

Arogundade was born in Sweden, lived briefly in London, and was raised mostly in the Hornstull section of Stockholm. His mother is Swedish and is a makeup artist while his British father of Nigerian heritage is an architect, writer, and graphic designer. When he was around 4 or 5 years old, Arogundade's father taught him to use graphic software. His interest in art would expand beyond graphic design and inter photography, illustration, fashion, and music later in his life.

Arogundade met Benjamin Reichwald (who would become known as the rapper Bladee) in 2004 in his class and they would form a band for fun together called Krossad which means crushed in Swedish. When Arogundade was 16, he started his own clothing brand called Alaska and contacted a factory in China to make his clothing line. From that experience, Arogundade earned a job at the Swedish sneaker brand, Eytys, and works in product design, graphic design, is the in-house retoucher, and does a lot of web stuff as well.

Musically, Arogundade raps under the moniker ECCO2K and formed Gravity boys alongside rappers Bladee and Thaiboy Digital and producers Yung Sherman and White Armor.

As a producer, he is known as Aloegarten.

Arogundade is a close collaborator with Yung Lean and Sad Boys. He has made videos for them and has done cover design and art direction for all of Yung Lean's albums.