 The future bioeconomy will rely heavily on lignosellulosic biomass, which is difficult to process due to its recalcitrant nature. Enzymatic conversion of cellulose, the most abundant and homogeneous polysaccharide in lignosellulosic biomass, is a key technology for future biorefineries. Recent research has focused on new enzyme types, such as CBM33 and GH61, which promote the efficiency of classical hydrolytic enzymes by acting on the surfaces of insoluble substrates and introducing chain breaks in polysaccharide chains without extracting them from their crystalline matrix. This article was authored by Hornsven, Varjikolstad Gustov, Westerengj, and others.