Several studies in the educational field have explored the use of digital technologies and how they promote the strengthening of socioemotional competencies. However, most of these studies have focused on students, leaving their application to teachers in the background. This systematic review identifies and analyzes studies on the application of digital tools aimed at strengthening the socioemotional competencies of teachers in order to answer the following question: What digital technologies have been implemented to support the socioemotional development of teachers in educational settings and what are their results? The study followed the PRISMA 2020 guidelines, based on the identification of research in the ERIC, EBSCO, OpenAlex, Sciencedirect, Scopus, PubMed, arXiv, and Google Scholar databases. Out of 451 research studies identified in an observation window open to any year, 57 studies were selected for analysis. The digital technologies reviewed to strengthen teachers’ socioemotional competencies were grouped into three categories: self-reflection tools (65%), such as digital diaries and blogs; intentional emotional development technologies (68%), such as virtual reality and gamification; and collaborative platforms (37%), such as social networks. Their use evidenced the development of CASEL model competencies: self-awareness and responsible decision-making (86%), self-regulation (81%), social awareness (58%) and relational skills (68%). It is recommended to integrate these technologies in an intentional and contextualized way in teacher training, in order to enhance their well-being, emotional preparation, and prosperity even in the midst of current educational challenges.