Immuta Metadata Registry vs Microsoft Purview Information Protection: Side-by-Side Comparison (2026)

Short answer

Enterprise and mid-market security teams managing data access across multiple platforms should pick Immuta Metadata Registry because it enforces access policy at the metadata layer, meaning policies update automatically as data attributes change instead of requiring manual redeployment. The tool maps directly to NIST ID.AM and PR.AA through cross-platform asset discovery and dynamic identity-based controls, and its cell-level granularity eliminates the false choice between usability and least privilege. Skip this if your data lives in a single warehouse and your access model is relatively static; Immuta's value compounds with platform proliferation and frequent schema changes. Mid-market and enterprise teams already deep in Microsoft 365 will find their fastest path to data classification here because Purview classifies and labels at scale without ripping out existing infrastructure. The AI-powered classifiers work across SharePoint, OneDrive, Exchange, and Teams simultaneously, and the exact data match capability catches structured data like credit cards and social security numbers that pattern-matching alone misses. Skip this if your data lives primarily outside Microsoft environments or if you need detection and response for data exfiltration; Purview excels at ID.AM asset discovery and PR.DS labeling but leaves incident investigation to other tools.