Nacre

This system functions as a permission-aware, layered access control and search engine designed to provide secure, granular, and efficient retrieval of information within an organization. Its main features include a multi-layered index that enforces permission filtering within the traversal process, a strict and consistent permission model where access rights are evaluated before query execution, and an open-source, self-hosted core that allows organizations to customize their security perimeter and access rules; it addresses challenges related to data privacy, secure information retrieval, and real-time permission enforcement, making it ideal for security-focused engineers, enterprise administrators, and organizations requiring strict access governance in their data platforms.

Nacre can be found in API Security categories.