Cube (https://cube.dev https://cube.dev) is a good one. Others include AtScale[0], dbt's MetricFlow[1], Google's Looker[2] (also a BI tool but powered by a sem

Cube (https://cube.dev https://cube.dev) is a good one. Others include AtScale[0], dbt's MetricFlow[1], Google's Looker[2] (also a BI tool but powered by a semantic layer), and Propel[3]. [0] https://atscale.com https://atscale.com [1] https://www.getdbt.com/product/semantic-layer https://www.getdbt.com/product/semantic-layer [2] https://cloud.google.com/blog/products/data-analytics/introducing-looker-modeler https://cloud.google.com/blog/products/data-analytics/introd... [3] https://www.propeldata.com https://www.propeldata.com They're kind of an updated version of OLAP cubes if you're familiar with those. Typically semantic layers sit on top of a data warehouse, let you define metrics using code or a UI, and provide APIs or SQL connectors so that you can query them.