Online language training is becoming an increasingly popular way to upskill employees within companies. When properly planned and delivered, online courses can be just as effective as traditional classroom-based training. However, success depends on several key factors: the quality of learning materials, instructor competence, lesson interactivity, and alignment with business needs. Below is a comparison of both learning formats, the factors influencing the effectiveness of online courses, and the qualities a language courses provider should have to meet the expectations of both HR departments and learners.