Data Governance platforms operationalize the policies, standards, stewardship, and accountability frameworks that govern how an organization's data is used, shared, and protected. Core capabilities include policy authoring and lifecycle management, data classification against sensitivity tiers (PII, PHI, PCI, IP), business glossary curation, data ownership and stewardship workflows, compliance mapping against regulations (GDPR, CCPA, HIPAA, BCBS 239), and attestation and audit-evidence production. The category has converged with the Data Catalog market as buyers increasingly want governance policies and discovery surfaces in one product. Leading vendors include Collibra, Informatica, Alation, Atlan, Ataccama, and Precisely.