Druid

Druid is an open source, Apache-2.0-licensed data store designed for real-time analytics. It combines distributed data storage with a column-oriented structure, providing a system specifically intended to support analytics performed in real time. In the web analytics category, it is suited to teams and organizations that need a distributed, column-oriented store as the data foundation for real-time analytical work. Druid can serve as an open source replacement for Google Analytics when the primary requirement is storing data for real-time analysis. However, it is not a direct feature-for-feature equivalent based on the available description. Druid is specifically described as a data store, not as a complete web analytics product, and no additional tracking, reporting, or user-facing analytics features are stated. Organizations considering it as a Google Analytics replacement should therefore distinguish between the underlying real-time analytics data store Druid provides and any broader web analytics capabilities they may require.