TiDB and Rockset are two vector databases designed to store and query high-dimensional vectors, enabling efficient similarity searches in AI applications such as e-commerce product recommendations, content discovery platforms, anomaly detection, medical image analysis, and natural language processing tasks. TiDB is an open-source, distributed SQL database with MySQL compatibility, supporting hybrid transactional and analytical processing (HTAP) capabilities, while Rockset is a real-time search and analytics database for structured and unstructured data, including vector embeddings, offering fast vector search and real-time processing. The key differences between the two lie in their search methods, performance, data management, scalability, and integration, with TiDB being more suitable for complex applications requiring both vector search and relational database capabilities, while Rockset is ideal for real-time applications with frequent data updates. A tool like VectorDBBench can help evaluate and compare these vector databases based on actual performance rather than marketing claims.