Data Catalogs & Discovery

Apache Atlas is an Apache Software Foundation project providing metadata management, classification, and lineage for the Hadoop ecosystem, with an extensible type system and an authorization path through Apache Ranger.

Apache Gravitino is a federated metadata lake: rather than copying metadata into its own store, it manages metadata in place across Hive, JDBC databases, object storage, and message systems, exposing one model and one API for data and AI assets across regions and clouds.

Collibra is a commercial data intelligence platform whose centre of gravity is governance: stewardship workflows, policies, and a business glossary, with a data catalog, lineage, quality and observability, a data marketplace, and AI governance built around them.

Alation is a commercial data catalog and data intelligence platform combining search and discovery, lineage, stewardship, and data quality, deployable either as the Alation Cloud Service or on the customer's own infrastructure.

Atlan is a commercial metadata platform covering discovery, lineage, glossaries, contracts, and policies across 80-plus sources, delivered as SaaS with a self-deployed runtime that keeps metadata extraction inside the customer's own network.

Microsoft Purview combines data governance — a Data Map that scans and classifies assets and a Unified Catalog above it — with data security and compliance solutions, billed through Azure meters for capacity, scanning, and governed assets.

Knowledge Catalog — previously Dataplex Universal Catalog, and the replacement for the retired Data Catalog — harvests metadata from BigQuery, Vertex AI, Pub/Sub, Bigtable, Cloud SQL, and AlloyDB into entries described by aspects, with natural-language search, lineage, and glossaries over the result.

Amazon DataZone is AWS's data management service for cataloguing, discovering, sharing, and governing data across AWS, on-premises, and third-party sources, organised around projects that publish assets and subscription requests that are approved through a governed workflow.

DataHub is an open-source metadata platform providing search, discovery, and end-to-end lineage across warehouses, pipelines, and BI tools via push-based ingestion.

OpenMetadata is an open-source metadata platform combining catalog, lineage, data quality tests, and collaboration on a single schema-first foundation with many connectors.