This chapter analyzes how artificial intelligence (AI) can be a positive challenge to improve labor union services in mental health at work. Automation and digitalization, while offering benefits in efficiency and productivity, also introduce new psychosocial risks, such as technostress. The chapter explores the role of unions as guarantors of workers' rights in digital transformation processes. Also justifies the need for an organizational transformation of unionism, including updating service structures, digitizing the union, and developing a proactive strategy towards occupational mental health. The chapter concludes by arguing that unions must adopt a proactive approach, use new technologies responsibly and collaborate with other social actors to protect the mental health of workers in the digital age.