Dataplex Universal Catalog, renamed Knowledge Catalog in April 2026, is Google Cloud's managed metadata catalog and successor to Data Catalog. Pages here cover moving to self-hosted OpenMetadata or DataHub.
Moving from Dataplex (Knowledge Catalog) to self-hosted OpenMetadata: ingesting BigQuery and other sources with OpenMetadata connectors, loading glossaries and descriptions from a metadata export job, and replacing aspect types with custom properties and classifications.
Moving Dataplex metadata to self-hosted DataHub: BigQuery and Looker ingestion in DataHub, using the JSONL metadata export as the source for curated fields, mapping glossary terms and entry groups, and where DataHub should run relative to Google Cloud.
Comparing Dataplex (Knowledge Catalog) with OpenMetadata: automatic cataloging of Google Cloud resources against connector-based ingestion across clouds, glossary and data quality features, lineage, managed service against self-hosting, and operating effort.
For teams with data in and beyond Google Cloud: Dataplex against DataHub's 150+ integrations, column-level lineage, glossary and governance features in DataHub Core, and the Kubernetes, Kafka and search services DataHub needs.
Data Catalog was discontinued on June 1, 2026, and Google's path is Knowledge Catalog. For teams that never finished the transition or want a catalog they control, this page compares completing it with moving to OpenMetadata or DataHub, and what to keep for BigQuery policy tags.
Using Knowledge Catalog metadata export jobs: choosing organization, project or entry group scope, the JSONL output in Cloud Storage and its 1,000,000-entry files, querying it with BigQuery, and transforming it for OpenMetadata or DataHub.
Dataplex catalogs Google Cloud resources automatically but needs custom entries or connectors for everything else. For estates spread across AWS, Azure and on-premises databases, this page compares that with one self-hosted OpenMetadata or DataHub catalog across all of them.
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