SSO Solutions Comparison (Self-Hosted)¶
What it is¶
This document provides a comparative analysis of self-hosted Single Sign-On (SSO) and Identity and Access Management (IAM) solutions. These tools allow users to use a single set of credentials to access multiple independent software systems within a homelab or enterprise environment.
What problem it solves¶
Managing separate usernames and passwords for dozens of self-hosted services (Nextcloud, Gitea, etc.) is insecure and cumbersome. SSO centralizes authentication, enables Multi-Factor Authentication (MFA) across all services, and simplifies user onboarding and offboarding.
Where it fits in the stack¶
SSO sits in the Identity and Access layer of the infrastructure stack. It typically integrates with a directory service (like LDAP) or acts as the directory itself, providing authentication protocols like OIDC (OpenID Connect), SAML, and OAuth2 to application-layer services.
Comparison Matrix¶
| Feature | Authentik | Kanidm | LL-LDAP (Lightweight) |
|---|---|---|---|
| Primary Focus | Modern, multi-protocol (OIDC, SAML, LDAP) | Identity-first, high security, Rust-based | Minimalist LDAP provider |
| User Interface | Comprehensive web-based admin & user portal | Modern web UI + robust CLI | Minimal or none (usually config files) |
| Protocols | OIDC, SAML, LDAP, OAuth2 | OIDC, LDAPS | LDAP only |
| Ease of Use | Medium (lots of features) | Medium (security-focused defaults) | High (for simple setups) |
| Resource Usage | High (multiple containers) | Low/Medium | Very Low |
| 2FA Support | Excellent (WebAuthn, TOTP) | Excellent (WebAuthn-first) | Limited/External |
Typical use cases¶
- Centralized Homelab Auth: Using one login for all services behind a reverse proxy.
- Family Member Portals: Providing a user-friendly dashboard where family members can manage their own security settings.
- Legacy App Support: Providing LDAP authentication for older software that doesn't support modern OIDC.
Strengths¶
- Security: Centralizes MFA enforcement and password policies.
- User Experience: Reduces login friction with "One-Click" access to services.
- Interoperability: Supports diverse protocols (OIDC, SAML, LDAP).
Limitations¶
- Single Point of Failure: If the SSO service goes down, access to all integrated services is lost.
- Complexity: Setting up SAML or complex OIDC flows can be technically challenging for beginners.
- Resource Intensity: Full-featured solutions like Authentik require significant RAM compared to simple LDAP.
When to use it¶
- When you have more than 3-5 self-hosted services that support external authentication.
- When you want to enforce hardware-based MFA (WebAuthn) across your entire stack.
- When sharing your homelab with non-technical family members.
When not to use it¶
- For very simple setups with only one or two users and few services.
- On extremely resource-constrained hardware (e.g., Raspberry Pi Zero).
- If you prefer the isolation of separate credentials for every service.
Related tools / concepts¶
- Authentik: A versatile open-source IdP.
- Gitea: Self-hosted Git service that supports OIDC/LDAP.
- Nextcloud: Collaboration platform with robust SSO integration.
- Vikunja: Task manager that integrates with OpenID Connect.
- Paperless-ngx: Document management with SSO support.
- Tailscale: Zero-config VPN that can use SSO for identity.
- Habitica: Productivity app that can be part of a unified auth strategy.
Sources / references¶
Contribution Metadata¶
- Last reviewed: 2026-05-11
- Confidence: high