This article presents a synthetic and summarized view of the research in Humanistic Psychotherapies (PH), also called Experiential Humanistic Psychotherapies (PHE). In the first section, different types of studies are presented along with some of their results, showing how they provide empirical support to the consideration of HPs as useful and effective treatments. The second section presents two complementary perspectives: transdiagnostic research and network research on the practice of psychotherapy, including studies carried out within the humanistic model.