GitHub – ory/keto: Open Source (Go) implementation of “Zanzibar: Google’s Consistent, Global Authorization System”. Ships gRPC, REST APIs, newSQL, and an easy and granular permission language. Supports ACL, RBAC, and other access models.

Ory Keto implements the basic API contracts for managing and checking relations (“permissions”) with HTTP and gRPC APIs. Future versions will include features such as userset rewrites (e.g. RBAC-style role-permission models), Zookies, and more.