CockroachDB is a source-available distributed SQL database management system developed by Cockroach Labs The relational functionality is built on top of a distributed, transactional, consistent key-value store that can survive a variety of different underlying infrastructure failures, and is wire-compatible with PostgreSQL which means users can take advantage of a wide range of drivers and tools from the extensive PostgreSQL ecosystem.
OpenFGA is an open-source authorization solution that allows developers to build granular access control using an easy-to-read modeling language and friendly APIs. It is modelled after the Google Zanzibar authorization model.
Combining both of these technologies provide a strongly consistent authorization system. It seperates authentication (AuthN) from authorization (AuthZ).