DataHub

DataHub is an open source metadata platform originally built at LinkedIn for cataloging and managing data across an organization. It tracks where data lives, how it flows between systems, who owns it, and how it is used, giving teams a searchable map of their data assets. In the context of AI systems, this kind of metadata helps determine which datasets are trustworthy and relevant enough to feed into a model. Because it is open source, teams can self host and extend it rather than relying on a managed vendor.