Cube.js is an open-source analytical API platform. It is primarily used to build internal business intelligence tools or add customer-facing analytics to existing applications.

Cube.js was designed to work with serverless data warehouses and query engines like Google BigQuery and AWS Athena. A multi-stage querying approach makes it suitable for handling trillions of data points. Most modern RDBMS work with Cube.js as well and can be further tuned for performance.

With Cube.js, you can create a semantic API layer on top of your data, manage access control, cache, and aggregate data. Since Cube.js is visualization agnostic, you can use any frontend library to build your own custom UI.

If you are building your own business intelligence tool or customer-facing analytics, it is quite likely you'll face one or more of the following problems:

  1. Performance. A significant amount of effort in modern analytics software development is spent providing adequate time to insight. In a world where every company's data is big data, just writing SQL queries for insights isn't enough anymore
  2. SQL code organization. Modelling even a modest number of metrics and dimensions using pure SQL queries eventually becomes a maintenance nightmare, which then requires engineering effort in building a modelling framework
  3. Infrastructure. Any production-ready analytics solution requires key components such as analytic SQL generation, query results caching and execution orchestration, data pre-aggregation, security, a querying API and support for visualization libraries

Cube.js has the necessary infrastructure for any analytics application that heavily relies on a caching and pre-aggregation layer to provide insights from raw data within minutes and an API with sub-second response times on up to a trillion data points.

Cube.js acts as an analytics backend, translating business logic (metrics and dimensions) into SQL and managing caching, queuing and database connection.

The Cube.js JavaScript client sends queries conforming to the Query Format to the REST API. The server uses a Schema to generate an SQL query, which is executed by your chosen database. The server handles all database connections, as well as pre-aggregations and caching layers. The result is then sent back to the client. The client itself is visualization-agnostic and works well with any chart library.

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