Active metadata platform and data catalog for enterprise governance
Atlan is a data catalog and metadata platform aimed at enterprise governance. It collects technical metadata from warehouses, BI tools, pipelines and transformation code, combines it with human context such as owners, descriptions and certification status, and makes the result searchable. Its distinguishing idea is active metadata: instead of being a passive reference, the catalog can push signals back out - triggering alerts, driving access requests or propagating tags. Assistive features generate column descriptions and answer questions about assets. It is a commercial platform with enterprise pricing, and its value grows with the number of tools and people it has to keep in agreement.
Last updated: 2026-09-20. This site only provides an index; for exact features, pricing, and licensing, see the official website.
data governance, metadata management, lineage and enterprise cataloging
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Organisations where many people across several teams share data and the cost of confusion is high - wrong numbers in reports, duplicated datasets, unclear ownership. A single team with one warehouse rarely needs one.
It generates descriptions, summaries and answers questions about assets, which reduces manual documentation. Governance rules, ownership and certification remain human decisions that the platform records and enforces.
Curation discipline. A catalog nobody updates decays into an out-of-date directory. Teams that assign owners and enforce metadata requirements see returns; those that treat it as a one-off project rarely do.
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