What language is Tableau written in?

Tableau is primarily written in C++, especially for its core data processing and visualization engine. However, Tableau is a large software platform, so it uses several other technologies as well.

In simple terms, C++ handles much of Tableau’s core functionality, particularly where high performance is important. Tableau also uses technologies such as Java, Python, JavaScript, and SQL in different parts of its platform and ecosystem.

For someone learning Tableau, you generally do not need to know C++. The more useful skills are understanding data visualization, SQL, databases, calculations, and Tableau’s own features and functions.