AppSec Prot-On vs Immuta Metadata Registry: Side-by-Side Comparison (2026)

AppSec Prot-On

SMB and mid-market teams drowning in unclassified documents will find immediate value in AppSec Prot-On's automatic labeling and file-level access controls, which actually enforce what your policy says instead of just storing it. The tool covers ID.AM and PR.DS functions in NIST CSF 2.0, meaning it handles both discovery of what you own and real-time protection of it across PDFs, Office files, and media. Skip this if your organization needs sophisticated identity federation or wants to integrate data classification with broader DLP orchestration; Prot-On is document-protection focused, not a platform play.

Immuta Metadata Registry

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.