According to PPC Hero, Karl is the number 3 most influential conversion expert in the world. Together with his heroes Nir Eyal, Daniel Kahneman and Don Norman Karl features on the list of 30 conversion-masterminds. He’s the G in AGConsult, a Belgium-based conversion optimization & usability company. He accelerates the growth of businesses through customer happiness. Always based on user research & facts. Because opinions are just opinions.

Karl teaches at several universities in Belgium and is a top-rated speaker at conferences all over the world. He’s also known as the UX comedian.

He helps companies such as Suzuki, TUI, Carglass and Yoast to become truly customer-centric.