Self-Hosted Auth0 Alternatives
Developers often seek alternatives to Auth0 due to concerns about cost at scale, vendor lock-in, and data sovereignty. Self-hosted solutions give you full control over authentication flows, user data, and compliance requirements, while eliminating per-user pricing that can skyrocket as your user base grows.
When evaluating self-hosted alternatives, consider the maturity of the project, ease of deployment and maintenance, support for standard protocols (OAuth2, OIDC, SAML), and the community or commercial backing. The right choice depends on your team's operational capacity and specific use cases like SSO, MFA, or API access control.
Top picks
Authentik
Open SourceSelf-HostableSelf-hosted identity provider for SSO, access control, and internal app security
Authentik is a self-hosted identity provider that excels at unifying SSO, access control, and internal app security with a clean, modular architecture and a built-in provider for LDAP, OAuth2, and SAML, making it a drop-in replacement for Auth0 in many scenarios.
Quick comparison
| Tool | Pricing | License | Self-host |
|---|---|---|---|
| Authentik | $0 | GPL 3.0 | Yes |
Also worth a look
Keycloak
open_in_newKeycloak is a mature, open-source identity and access management solution with broad protocol support, but its Java-based architecture can be resource-intensive and complex to configure.
Ory
open_in_newOry offers a suite of microservices for authentication and authorization, providing granular control and high performance, though it requires more assembly and operational overhead than an all-in-one solution.
Zitadel
open_in_newZitadel is a modern, cloud-native identity platform with strong multi-tenancy and audit features, but its self-hosted version may lag behind the cloud offering in terms of updates and documentation.
Frequently asked questions
Is Authentik free and open-source?
Yes, Authentik is completely free and open-source under the MIT license. There are no paid tiers or hidden costs for self-hosting.
Can I migrate my existing Auth0 users to Authentik?
Migration is possible but not trivial. You'll need to export user data from Auth0 (via API or backup) and import it into Authentik using its API or admin interface. Password hashes may need rehashing if algorithms differ.
Does Authentik support social login and MFA?
Yes, Authentik supports social login (Google, GitHub, etc.) and multiple MFA methods including TOTP, WebAuthn, and SMS. It also supports conditional MFA policies.
How does self-hosting Authentik compare to Auth0 in terms of cost?
Self-hosting Authentik eliminates per-user fees, but you incur infrastructure costs (server, storage, bandwidth) and operational overhead for maintenance, updates, and scaling. For large user bases, self-hosting is typically cheaper.