OpenMetadata

OpenMetadata is an open-source platform for cataloging, discovering, and governing data across an organization. It connects technical metadata, lineage, ownership, usage, policies, glossaries, classifications, and data contracts into one metadata graph, giving data teams a single trusted place to find and understand their assets.

Metadata is collected through 130+ connectors plus ingestion APIs, events, and SDKs, then normalized with open schemas so assets, relationships, and lineage stay consistent. The graph powers semantic search, column-level lineage and impact analysis, data quality tests, profiling and freshness checks, governance with roles and policies, and an MCP server that lets AI assistants query metadata in natural language.

It is typically installed from a Docker-based quickstart for self-hosting, with a hosted sandbox to try first. It suits data engineering and governance teams wanting an open catalog they control, and is licensed under Apache-2.0.