Authelia

Authelia is an open-source authentication and authorization server that puts you in complete control of who accesses your self-hosted applications and internal services. Supporting OAuth 2.0, OpenID Connect, and SAML protocols, Authelia acts as a unified Single Sign-On gateway for your entire application ecosystem, eliminating the need for expensive enterprise identity providers like Okta or Azure AD. Implement comprehensive MFA policies, fine-grained access control rules, and seamless reverse proxy integration to secure everything from internal dashboards to production applications. With local authentication, LDAP/Active Directory integration, and passwordless authentication options, Authelia provides enterprise-grade identity management that respects your autonomy and keeps authentication data entirely within your infrastructure—no cloud dependencies, no recurring license fees, no vendor lock-in.