Open-source alternatives to commercial data catalogs and governance platforms such as Collibra, Alation and Atlan, self-hosted in your own infrastructure.
Collibra Platform is a SaaS data catalog and governance product run by Collibra on AWS and Google Cloud, with Edge sites for processing inside the customer's network and no maintained on-premises option for commercial customers since January 2023.
Alation is a data catalog sold as Alation Cloud Service, which Alation hosts and upgrades, or as customer-managed software the customer installs and maintains, with a growing list of features available only in the cloud service.
Atlan is a cloud-first, single-tenant SaaS data catalog and governance platform hosted by Atlan on AWS, Azure or Google Cloud, with only a Self-Deployed Runtime for connectors running in the customer's network.
Microsoft Purview Unified Catalog is Microsoft's SaaS data governance catalog on top of the Purview Data Map, billed per governed asset and per data quality processing unit. Pages here cover moving to self-hosted OpenMetadata or DataHub.
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.
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