Frontier

Frontier is an all-in-one user management platform from Raystack that combines identity, access control and billing. It is intended for teams that want to manage authentication and authorization across several applications and services from one server they control. The repository describes it as an open-source alternative to Clerk and WorkOS.

Core capabilities include user, organization, project and group management, so multiple tenants can each have their own users, applications and services. Authentication supports email one-time passwords and social login for people, and API keys or RSA JWT credentials for machine users. Authorization uses role-based access control with policies that bind a user to an access level. Billing and subscription management, audit logs of user activity and access events, and reporting are also included.

Frontier is written in Go and licensed under Apache-2.0. It can be installed as a cross-platform binary from the releases page and runs on macOS, Windows, Linux and the BSDs. The project provides introduction, concepts and API reference documentation. Because it is self-hosted, you run and secure the server yourself.