Products that bear the label "natural" have gained more attention in the marketplace. In this approach, the production of aroma compounds through biotransformation or bioconversion has been receiving more incentives in economic and research fields. Among the substrates used in these processes, terpenes can be highlighted for their versatility and low cost; some examples are limonene, alpha-pinene, and beta-pinene. This work focused on the biotransformation of the two bicyclic monoterpenes, alpha-pinene and beta-pinene; the use of different biocatalysts; the products obtained; and the conditions employed in the process.