Background: Technology and its use within mental health services has advanced dramatically over recent years. Opportunities for mental health services to utilise technology to introduce novel, effective, and more efficient means of delivering assessment, and treatment are increasing. Objective: The current rapid-evidence paper reviews evidence regarding the introduction of novel technology to support young people's mental health and psychological well-being. Methods: A rapid evidence review was conducted. PSYCHINFO and CINAHL were searched for research articles between 2016 and 2021 that were specific to young people, mental health, and technology developments within this domain. N = 27 studies which explored the introduction, feasibility, and value of technology for mental health purposes were included in a narrative synthesis. Quality or risk of bias analyses were not completed. Results: Overall, technological advancements in young people's care were considered positive and engaging for young people. Factors including resources, efficiency of care, engagement, therapeutic effectiveness, ethical considerations, therapeutic alliance, and flexibility were considered within this review. Nevertheless, potential barriers include clinician concerns, socioeconomic factors, and motivation. Conclusion: Effective and sustained use of technology within young people's mental health services will depend on the technology's usability, efficiency, and ability to engage young people. This paper expands on existing research by reviewing a broader range of technology proposed to support young people's mental health and well-being. This will assist in the application of novel technological advancements by indicating effectiveness, preferences, potential barriers, and recommendations for the feasibility and efficacy of introducing technology into young people's services.