This systematic mapping study provides a comprehensive review of current Fintech publications, analyzing the current state, maturity level, and future directions of Fintech research. The study reviews 518 Fintech articles from four academic databases (ACM Digital Library, IEEE Xplore, Scopus, and Web of Science) published between 2008 and 2021. Key findings include: 1. **Current State of Fintech Research**: The number of Fintech articles has significantly increased, especially in 2021, with a notable rise in high-impact journals (Quartile 1 and 2). China, the US, and the UK are leading in both the total number of articles and high-impact articles. 2. **Maturity Level of Fintech Research**: Fintech research is still in its early stage, positioned between technology triggers and inflated expectations. The business lens reveals that Fintech research primarily focuses on startups and financing, indicating a low maturity level compared to other industries. 3. **Types of Fintech**: A classification scheme is proposed, categorizing Fintech into five dimensions: Fintech industry, Fintech firms, Fintech systems/platforms/apps, Fintech as tools and services, and Fintech technologies. Fintech services and the Fintech industry are the most popular research topics. 4. **Future Research Directions**: Future research should explore the integration of Fintech and banking systems, continued use and perceived benefits and risks of Fintech services for end users, and sustainable development in areas such as consumer protection, cross-industry cooperation, and financial regulation. The study contributes to the Fintech literature by providing a comprehensive analysis, examining the maturity of Fintech research, and proposing a detailed classification scheme. It offers valuable insights for researchers and practitioners to evaluate the direction and scope of future Fintech research.This systematic mapping study provides a comprehensive review of current Fintech publications, analyzing the current state, maturity level, and future directions of Fintech research. The study reviews 518 Fintech articles from four academic databases (ACM Digital Library, IEEE Xplore, Scopus, and Web of Science) published between 2008 and 2021. Key findings include: 1. **Current State of Fintech Research**: The number of Fintech articles has significantly increased, especially in 2021, with a notable rise in high-impact journals (Quartile 1 and 2). China, the US, and the UK are leading in both the total number of articles and high-impact articles. 2. **Maturity Level of Fintech Research**: Fintech research is still in its early stage, positioned between technology triggers and inflated expectations. The business lens reveals that Fintech research primarily focuses on startups and financing, indicating a low maturity level compared to other industries. 3. **Types of Fintech**: A classification scheme is proposed, categorizing Fintech into five dimensions: Fintech industry, Fintech firms, Fintech systems/platforms/apps, Fintech as tools and services, and Fintech technologies. Fintech services and the Fintech industry are the most popular research topics. 4. **Future Research Directions**: Future research should explore the integration of Fintech and banking systems, continued use and perceived benefits and risks of Fintech services for end users, and sustainable development in areas such as consumer protection, cross-industry cooperation, and financial regulation. The study contributes to the Fintech literature by providing a comprehensive analysis, examining the maturity of Fintech research, and proposing a detailed classification scheme. It offers valuable insights for researchers and practitioners to evaluate the direction and scope of future Fintech research.