Authelia vs Keycloak: Which One Suits You Best?

Organizations seeking efficient single sign-on (SSO) solutions are increasingly turning to self-hosted, open-source options like Authelia and Keycloak, which offer flexibility and customization without the need for big-name services like Auth0 or Okta. Authelia serves as a lightweight authentication and authorization server, ideal for environments using reverse proxies like Traefik or NGINX, providing forward authentication and multi-factor authentication (MFA) to secure self-hosted applications. In contrast, Keycloak is an enterprise-level identity provider (IdP) that supports OAuth 2.0, OpenID Connect (OIDC), SAML, and LDAP, and is suitable for large-scale deployments requiring robust user management, identity federation, and extensive API integration. Both solutions offer unique strengths; Authelia is optimal for small to medium-scale self-hosted deployments, while Keycloak excels in handling large, distributed systems with complex IAM needs. The choice between them depends on specific requirements such as integration flexibility, user management capabilities, scalability, and the need for enterprise-level support.