Ory Keto, open source authorization server based on Google Zanzibar
Hello! I am one of the maintainers of Ory Keto. We spent a lot of time and effort to read, learn, and analyse the Google Zanzibar paper (<a href="https://research.google/pubs/pub48190/" rel="nofollow">https://research.google/pubs/pub48190/</a>) and the release brings that all together. There are still many things missing, but with a great community we hope to build the “Kubernetes” of permissions and access control! If you have any questions, I am here to help