Open finance is an evolution of open banking that extends data sharing beyond traditional banking to encompass various financial services such as investments and insurance, aiming to enhance customer experiences by providing a comprehensive view of their financial data. MongoDB is highlighted as a suitable data platform for managing the vast and diverse data needs of open finance due to its flexibility, scalability, and ability to integrate seamlessly with RESTful JSON APIs. Financial institutions face strategic decisions about whether to build in-house open finance solutions, offering control and customization, or to purchase them from third-party providers, which can speed up time to market. Challenges in open finance include data integration complexities, diverse data types, data security risks, and regulatory compliance, all of which affect the speed and cost of innovation in financial services. The document also notes the growing adoption of open finance globally, driven by regulatory and market forces, with varying implementations across regions such as Europe, the UK, and India. Furthermore, MongoDB's expansion into Mexico with its Atlas cloud-native database highlights its commitment to supporting financial services in the region, offering local deployment options and advanced features to help businesses modernize and innovate rapidly.