Oso Modeler alternatives

Stytch is a full stack authentication and authorization platform, whose APIs make it simple to seamlessly onboard, authenticate and engage users. Improve security and user experience by going passwordless.

Authorizer is an open-source authentication and authorization solution for your applications. Bring your database and have complete control over the user information. You can self-host authorizer instances and connect to any SQL database.

Oso is what engineering teams use when they're done rolling their own permissions. It lets your application answer questions like “can this user read that document?” or “which objects can this agent manage?” by defining your authorization logic centrally, plugging in your application data, and calling the Oso API to enforce permissions across apps, RAG, and agents—available in the cloud or self-hosted.