authentik vs Zitadel
authentik against Zitadel: MIT with an enterprise directory against AGPL-3.0, LDAP, RADIUS and proxy outposts against multi-tenant organizations and event sourcing, and fit for internal IT versus customer-facing apps.

Comparisons anchored on authentik, the MIT-licensed identity provider with a paid enterprise edition: against Zitadel and Authelia.
authentik against Zitadel: MIT with an enterprise directory against AGPL-3.0, LDAP, RADIUS and proxy outposts against multi-tenant organizations and event sourcing, and fit for internal IT versus customer-facing apps.
Two popular self-hosted SSO options compared: authentik's full identity provider with admin UI, SAML, LDAP and proxy providers against Authelia's lightweight forward auth, OIDC provider and file or LDAP users.
Choosing SSO for self-hosted apps behind a reverse proxy: footprint, protocols, user management and paid features of authentik, Authelia and Keycloak, and when each is the right size.
Whether to run authentik with the official Docker Compose file on one host or with the authentik Helm chart on Kubernetes. Covers the components both run (server, worker, PostgreSQL), what the docs say Compose is suited for, why the chart's bundled database is not for production, persistent storage and autoscaling.
Whether a self-hosted authentik identity provider needs the Enterprise edition: what the free edition already covers in protocols and remote access, the Entra ID and Google Workspace sync, PAM, mTLS and compliance features Enterprise adds, per-user pricing for internal and external users, and how license expiry leads to read-only mode.
Two self-hosted identity providers often shortlisted by smaller IT teams: authentik's MIT core with flows, proxy and RAC outposts, SAML and a paid Enterprise edition on PostgreSQL, against Kanidm's Rust server with its own replicated database, Unix and SSH integration, RADIUS and passkey attestation but no SAML. Covers admin experience, protocol coverage and upgrade cadence.
The common homelab and small-team setup question: protecting apps behind Traefik with authentik's proxy outpost or Authelia's forward-auth companion. Compares setup, user backends, second factors, OIDC for apps that support it and resource needs.

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