Best Self-Hosted Authentication & SSO in 2026

Quick Picks

Use Case	Best Choice	Why
Best overall for homelabs	Authentik	Full identity provider with clean UI and reasonable resource usage
Best lightweight SSO	Authelia	Minimal resources, works as a reverse proxy auth layer
Best for enterprise	Keycloak	Industry standard, protocol support, federation
Best modern alternative	Zitadel	Cloud-native, event-sourced, built-in OIDC/SAML

Updated February 2026: Verified with latest Docker images and configurations.

The Full Ranking

1. Authentik — Best Overall

Authentik is a full identity provider that handles authentication, authorization, user management, and single sign-on from a single platform. It provides a polished admin UI, a customizable login flow builder, and support for SAML, OIDC/OAuth2, LDAP, SCIM, and proxy authentication. The flow system lets you build multi-step login sequences (MFA, email verification, user enrollment) without code.

Pros:

• Visual flow builder for login and enrollment sequences
• Full LDAP provider (not just consumer — it can BE your LDAP server)
• Proxy authentication for apps that don’t support SSO natively
• Clean, modern admin interface
• Active development with monthly releases

Cons:

• Heavier than Authelia (Python + PostgreSQL + Redis)
• Requires 2-4 GB RAM
• Steeper learning curve than Authelia for basic SSO

Best for: Self-hosters who want a single identity provider for all their apps, including LDAP-dependent services.

Read our full guide: How to Self-Host Authentik

2. Authelia — Best Lightweight SSO

Authelia is a reverse proxy authentication companion. It sits alongside Nginx, Traefik, or Caddy and adds SSO, 2FA (TOTP, WebAuthn, Duo), and access control to any web application. It doesn’t try to be a full identity provider — it does one thing well: authenticate users before they reach your apps.

Pros:

• Lightweight — single Go binary, minimal resources
• Works with any reverse proxy (Traefik, Nginx, Caddy, HAProxy)
• Strong 2FA support (TOTP, WebAuthn/FIDO2, Duo Push)
• Simple YAML-based configuration
• OpenID Connect provider for apps that support it

Cons:

• Not a full identity provider (no user enrollment flows, no SAML provider)
• No visual admin UI — YAML configuration only
• No built-in LDAP server (reads from external LDAP/AD)

Best for: Homelabs and small deployments that need SSO and 2FA in front of their reverse proxy. The simplest path to “one login for everything.”

Read our full guide: How to Self-Host Authelia

3. Keycloak — Best for Enterprise

Keycloak is Red Hat’s open-source identity and access management platform. It’s the industry standard for enterprise SSO with support for SAML 2.0, OpenID Connect, OAuth 2.0, LDAP/Active Directory federation, social login, user federation, and fine-grained authorization policies. Used by banks, governments, and Fortune 500 companies.

Pros:

• Industry standard with massive ecosystem
• Full SAML 2.0 support (required by many enterprise apps)
• Identity brokering and social login (Google, GitHub, etc.)
• User federation (LDAP, Active Directory, Kerberos)
• Fine-grained authorization with policies
• Admin console and account management portal

Cons:

• Resource-heavy (Java-based, needs 2-4 GB RAM minimum)
• Complex configuration — steep learning curve
• Admin UI is functional but dated
• Overkill for small deployments

Best for: Organizations with enterprise requirements — SAML-dependent apps, Active Directory integration, compliance requirements, or 50+ users.

Read our full guide: How to Self-Host Keycloak

4. Zitadel — Best Modern Alternative

Zitadel is a cloud-native identity management platform built with Go. It uses an event-sourced architecture, supports OIDC and SAML out of the box, and provides multi-tenancy, branding per organization, and passwordless authentication. Newer than the others but gaining traction with modern deployments.

Pros:

• Cloud-native architecture (event-sourced, scalable)
• Built-in multi-tenancy for SaaS use cases
• Passwordless authentication (WebAuthn/FIDO2)
• Per-organization branding and policies
• Modern API-first design
• Lower resource usage than Keycloak

Cons:

• Smaller community than Keycloak or Authentik
• Fewer integrations and tutorials available
• No LDAP provider mode
• Documentation gaps for self-hosted deployment

Best for: Teams building multi-tenant applications or SaaS platforms that need embedded identity management.

Read our full guide: How to Self-Host Zitadel

Full Comparison Table

Feature	Authentik	Authelia	Keycloak	Zitadel
OIDC/OAuth2	Yes	Yes	Yes	Yes
SAML 2.0	Yes	No	Yes	Yes
LDAP provider	Yes	No	Yes (federation)	No
Proxy auth	Yes	Yes (primary mode)	No	No
2FA/MFA	TOTP, WebAuthn, SMS, Email	TOTP, WebAuthn, Duo	TOTP, WebAuthn	TOTP, WebAuthn
Passwordless	Yes	Yes (WebAuthn)	Yes	Yes
User enrollment	Yes (flow builder)	No	Yes	Yes
Social login	Yes	No	Yes (20+ providers)	Yes
Multi-tenancy	Tenants via flows	No	Realms	Organizations
Admin UI	Modern web UI	YAML config	Web console	Web console
Language	Python (Django)	Go	Java (Quarkus)	Go
RAM required	2-4 GB	256-512 MB	2-4 GB	512 MB - 1 GB
License	MIT	Apache 2.0	Apache 2.0	Apache 2.0

How We Evaluated

We assessed each platform on: protocol support (OIDC, SAML, LDAP), ease of setup, resource requirements, admin experience, 2FA/MFA capabilities, community size, and suitability for different deployment scales. All evaluations used Docker deployments on a standard VPS.

Related

• How to Self-Host Authelia
• How to Self-Host Authentik
• How to Self-Host Keycloak
• How to Self-Host Zitadel
• Authelia vs Authentik
• Authentik vs Keycloak
• Authelia vs Keycloak
• Zitadel vs Keycloak
• Authelia vs Zitadel
• Zitadel vs Authentik
• Self-Hosted Alternatives to Auth0
• Self-Hosted Alternatives to Okta
• Reverse Proxy Setup
• Security Basics for Self-Hosting