The State of Apache Polaris in July 2026: From Incubating Catalog to the Governance Layer of the Open Lakehouse

This article by Alex Merced (Dremio) provides a detailed technical overview of Apache Polaris as of July 2026, tracing its evolution from an incubating catalog to the governance layer of the open lakehouse. It covers the project's graduation to a Top-Level Project at Apache, monthly release train from 1.0 to 1.6, federation capabilities, RBAC to policy engine governance, and current dev list debates on semantic layers and lineage. The article also discusses adoption across engines and vendors, offers guidance for teams, and explains credential vending with a worked example. It is highly relevant to IT/technology, focusing on open-source data catalog, lakehouse architecture, and software engineering best practices.