According to the Apache Software Foundation, Apache Druid is a high-performance, real-time analytics database designed to deliver sub-second queries on streaming and batch data at scale and under load. It is positioned as a solution for powering real-time analytics applications that require fast queries and high uptime. Apache Druid is said to be suitable for companies of all sizes, from small businesses to large enterprises. It caters to a wide range of professions and industries, including data analysts, data engineers, business intelligence professionals, e-commerce companies, and digital advertising agencies.