Even the most consolidated providers continue changing their services in order to reach broader audiences and ensure long-term financial sustainability. Udacity, the first MOOCs provider, was also the first to shift from a student to a corporate -oriented model, whereas edX has kept its focus on their original mission of expanding access to knowledge. To better understand how they can address education and labour market challenges, it may be useful to classify MOOCs according to the main market they serve (Table 1).