privacyIDEA is a versatile, open-source multi-factor authentication solution that provides secure access to IT resources.
Free and Enterprise versions available
Best authentik Alternatives ranked by AI · updated Aug 2026
authentik is an open-source identity provider and access platform for SSO, MFA, directory integration, and application access. It targets self-hosters and organizations that need a broader identity-management interface than a reverse-proxy-focused gateway.
Developer: authentik Security Inc.
Price: Free, open source; commercial support available
🎯 goauthentik.io
Top 6 authentik alternatives
Keycloak is an open-source Identity and Access Management solution aimed at modern applications and services.
Free and open-source
MFAuth is a self-hosted multi-factor authentication server for organizations that want to manage authentication without relying on a hosted identity provider. It...
Pros
- Self-hosted deployment keeps authentication data under your control
- Lower operating cost than commercial MFA platforms
- Suitable for organizations that need an independently managed MFA service
Cons
- Requires more administration than hosted services such as Duo
- Smaller ecosystem and integration library than Keycloak or Auth0
- Documentation and enterprise support are less mature than commercial alternatives
Free, open source
Authelia is an open-source authentication and authorization server for adding single sign-on and multi-factor authentication to applications behind reverse proxies. It is...
Pros
- Strong reverse-proxy integration for self-hosted services
- Includes two-factor authentication and granular access policies
- Lightweight compared with full identity platforms
Cons
- Requires self-hosting and operational maintenance
- Fewer enterprise directory and lifecycle features than Keycloak or Okta
- Less suitable for large multi-tenant identity deployments
Free, open source
ZITADEL is an open-source identity and access management platform for developers building customer-facing and workforce applications. It provides OAuth 2.0, OpenID Connect,...
Pros
- Open-source core with hosted and self-managed deployment options
- Strong multi-tenancy and organization features for B2B SaaS
- Supports OAuth, OIDC, SAML, passkeys, and passwordless authentication
Cons
- Smaller ecosystem and community than Auth0, Okta, or Keycloak
- Some advanced enterprise capabilities require higher-tier plans
- Less turnkey UI customization than developer-focused services such as Clerk
Free tier; paid plans from $100/mo
6
Auth0 provides a comprehensive platform for authentication and authorization.
Pros
- Customizable authentication flows
- Scalability
- Advanced security features
Cons
- Complex setup for some use cases
- Higher learning curve
Free tier available. Paid plans start at $23/month.
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