Polars is a high performant OLAP query engine focussing on DataFrame front ends. It is written in Rust and exposes an API in multiple languages; Python, Rust, NodeJS, R and more.

Its vectorized, multi-threaded design allows for efficient data processing. Aside from performance it has an expressive and versatile API, which lead to many users phrasing they "Came for the speed, stayed for the syntax".