Keycloak
🇪🇺by Keycloak
Open-source identity and access management solution supporting SSO, OAuth 2.0, and SAML. Developed by Red Hat.
Open SourceSelf-HostableEU-hosted
GDPR Compliance Risk
Auth0 is a US-based service subject to the CLOUD Act. EU organizations using this service risk non-compliance with GDPR data transfer requirements.
GDPR-Compliant Alternative to Auth0
🇺🇸Okta · US-based · Subject to CLOUD Act
Auth0 by Okta is a flexible identity management platform that provides secure authentication and authorization services for applications. It simplifies user login, enhances security, and improves user experience. Ideal for developers and businesses.
Why You Need a GDPR-Compliant Alternative to Auth0
Since the landmark Schrems II ruling in 2020, transferring personal data to US-based services like Auth0 has become a significant legal risk for EU organizations. The US CLOUD Act gives American authorities the power to access data held by US companies, regardless of where that data is physically stored — even if it's in an EU data center.
While the EU-US Data Privacy Framework (DPF) adopted in 2023 provides a new legal basis for transfers, privacy experts and legal scholars have raised concerns about its long-term viability. The framework could face the same fate as its predecessors (Safe Harbor and Privacy Shield), both of which were struck down by the Court of Justice of the EU.
For organizations that want to eliminate compliance risk entirely, switching to a European-based authentication is the most straightforward solution. Below are the best GDPR-compliant alternatives to Auth0, all headquartered in Europe with data stored in EU data centers.
CLOUD Act Exposure
US authorities can access your data stored by Auth0, even if servers are located in Europe.
GDPR Fine Risk
Non-compliant data transfers can result in fines up to 4% of annual global revenue under GDPR Article 83.
EU Alternative Available
5 GDPR-compliant European alternatives available with full EU data residency.
5 GDPR-Compliant Alternatives to Auth0
European services with full GDPR compliance and EU data residency
Zitadel
🇨🇭by Zitadel
Zitadel is an open-source identity and access management platform developed by the European company Zitadel. It provides developers with tools for user authentication, authorization, and secure data management. The platform supports various protocols and integrates easily with existing applications, ensuring a streamlined user experience.
EU-BasedGDPR CompliantOpen SourceSelf-HostableSwiss hosted
by Authentik
Authentik is an open-source identity provider designed for user authentication and authorization. Developed by a European company, it supports various protocols including OAuth2 and SAML, enabling secure access management for applications. Authentik offers a customizable user interface and integrates easily with existing systems.
EU-BasedOpen SourceSelf-HostableSource AvailableEU-hostedGDPR Compliant
Rauthy
🇩🇪by Rauthy
Rauthy offers a self-hostable authentication solution designed for developers seeking control over their security infrastructure. Based in Germany, Rauthy provides a flexible, open-source platform that allows for customization and integration with existing systems, ensuring developers can tailor authentication processes to their specific needs.
EU-BasedOpen SourceEU-hosted
Bare.ID
🇩🇪by Bare.ID
Bare.ID offers a German self-hostable authentication solution designed for developers seeking control over their identity management. It provides a customizable open-source platform, allowing seamless integration with existing systems while ensuring data privacy and compliance with local regulations.
EU-Based
Quick GDPR Compliance Comparison
| Service | HQ Location | GDPR Native | EU Data Centers | CLOUD Act Free | Pricing |
|---|---|---|---|---|---|
🇺🇸Auth0 | United States | No | Partial | No | - |
| 🇪🇺Keycloak | EU | Yes | Yes | Yes | - |
| 🇨🇭Zitadel | CH | Yes | Yes | Yes | - |
| 🇩🇪Authentik | DE | Yes | Yes | Yes | - |
| 🇩🇪Rauthy | DE | Yes | Yes | Yes | - |
| 🇩🇪Bare.ID | DE | Yes | Yes | Yes | - |
Frequently Asked Questions
Is Auth0 GDPR compliant?
Auth0 is a US-based service operated by Okta. While it may have some GDPR compliance measures, as a US company it is subject to the CLOUD Act, which allows US authorities to access data stored by US companies regardless of where the data is physically located. This creates a fundamental conflict with GDPR requirements for data protection.
What are the GDPR risks of using Auth0?
The main GDPR risks include: (1) Data transfers to the US may lack adequate protection since the Schrems II ruling invalidated Privacy Shield, (2) US authorities can demand access under the CLOUD Act, (3) Your organization may face GDPR fines up to 4% of annual revenue for non-compliant data transfers, and (4) User consent may not be sufficient to legitimize transfers given the systematic access by US authorities.
What are the best GDPR-compliant alternatives to Auth0?
The top GDPR-compliant alternatives to Auth0 include Keycloak, Zitadel, Authentik. These European services store your data in EU data centers and are fully subject to GDPR protections.
How do I migrate from Auth0 to a GDPR-compliant alternative?
Most migrations involve three steps: (1) Export your data from Auth0 using their data export tools, (2) Create an account with your chosen EU alternative, and (3) Import your data into the new service. We provide detailed migration guides for each alternative to make the switch as smooth as possible.
Can EU companies legally use Auth0?
Since the Schrems II ruling (2020), EU organizations face significant legal risk when using US cloud services like Auth0. While the EU-US Data Privacy Framework (2023) provides a new legal basis, its long-term stability is uncertain. Many EU data protection authorities recommend using EU-based alternatives to avoid compliance risks entirely.
Other GDPR Alternatives in Authentication
Last updated: February 6, 2026
