* [OpenFGA v1.12.0](https://github.com/openfga/openfga) – High-performance authorization engine for modeling and enforcing fine-grained access control inspired by Google Zanzibar.

* [Permify v1.6.6](https://github.com/Permify/permify) – Service for building and managing fine-grained, scalable access controls quickly.

* [SpiceDB v1.49.2](https://github.com/authzed/spicedb) – Database for storing and querying fine-grained authorization data at scale.