KairosDB is an open-source database optimized for fast, scalable time-series data storage and analysis. Built on top of Apache Cassandra, it provides robust support for large-scale data systems, ideally suited for high-throughput environments typical in metrics and monitoring applications. KairosDB features a flexible and powerful API that allows for custom and complex queries on time-series data, facilitating efficient data retrieval, aggregation, and analysis. Featuring a user-friendly web interface and a variety of client libraries, KairosDB simplifies the integration and management of time-series data across diverse infrastructure setups.