Musa is a mobile microlearning solution that uses a chatbot powered by AI through WhatsApp to deliver learning paths to the end-users anytime from wherever they are. Our solution uses a microlearning methodology that when combined with an extensively used app like WhatsApp, helps reach and engage learners at scale. Musa increases access to training for all stakeholders, including those with restricted access to an internet connection, devices, or tertiary education. We have a partnership with Continental University, with whom we developed our methodology based on metacognition with nudges based on behavioral science.