Thanks for the question! A couple of things that we think are killer features of Warrant:

- The flexible access control modeling. Implementing a basic RBAC scheme isn't too difficult with a couple extra database tables, but going further than that (fine-grained access control, inheriting access, etc.) is quite a bit of effort. With Warrant, you can model anything from RBAC to fine-grained access control and everything in between.

- End-to-end SDK support. There are many authorization libraries out there, but all of them seem to forget about the frontend. Warrant provides SDKs for authorizing access to your backend as well as a React SDK to make it easy to show/hide pages and components in your React app.