Snowflake data masking lets you control who can see what in real time. It works at query-time, rewriting results based on masking policies you define. This means sensitive fields—like PII, financial data, or API keys—stay protected without duplicating or restructuring tables. But the feature is gated. How you pay for Snowflake decides if you can use it.
Dynamic Data Masking in Snowflake is available only on the Enterprise Edition or higher. If you are on Standard Edition, you cannot create masking policies or apply them to columns. You will need to upgrade your account or move workloads to a supported edition. The licensing model here is feature-tiered, not consumption-based. Data masking itself does not add credits to your bill, but the right subscription level is a hard requirement.
Masking policies work by binding rules to a column. These rules inspect the caller’s role at runtime. For example, one role might see the full SSN, while another sees only the last four digits. Snowflake enforces masking inside the query engine, so the logic is invisible to client applications. Grants and masking policies work together: you must define both role privileges and masking conditions to get airtight control.