European alternatives to Auth0

Zitadel is a Swiss open-source identity infrastructure platform founded in 2019. It provides developers and organizations with a complete solution for authentication, authorization, and user management. Zitadel supports modern auth standards including OAuth 2.0, OpenID Connect, and SAML, and offers features like multi-factor authentication, single sign-on (SSO), passwordless login, and fine-grained role-based access control. Unlike proprietary IAM solutions, Zitadel can be self-hosted for maximum data sovereignty, or used as a cloud service. It is designed for cloud-native applications and provides a powerful API and SDKs for multiple programming languages. As a European company operating under Swiss data protection laws, Zitadel is a strong privacy-respecting alternative to Auth0 or Okta.

Ory is a modular identity and access platform for applications. With an API-first approach, you can add sign-in quickly. You can combine open-source components into one system. It supports sign-in for customers, employees, and partners. Use it for consumer apps, B2B portals, or internal tools. Authentication uses modern standards like OIDC and OAuth 2. Connect SSO with SAML and your identity providers. Ory offers MFA, passwordless flows, and risk-aware challenges. Handle invitations, account recovery, and user lifecycle automation. Configure custom claims, scopes, and policies through the API. Because the components are separate, scaling is predictable. Run services in the cloud or in self-hosted environments. Tenant isolation keeps B2B and multi-brand experiences clean. Audit logs and operational metrics help teams stay compliant. Rate limits and session controls strengthen your security posture. Choose Ory when you want Auth0-like speed without lock-in. Keep control over data by selecting where your infrastructure runs. Migrations are easier with standards-based tokens and endpoints. Developers get clear documentation and composable building blocks. Teams gain flexibility to evolve authentication over time.

Authelia is an open-source access and authentication layer. It sits in front of your applications and reverse proxies. Teams use it to protect web apps with strong policies. It supports SSO workflows and modern identity integrations. You can deploy it self-hosted with full control over data. Authelia integrates with LDAP, OAuth providers, and identity systems. It can forward logins through SAML and OIDC compatible setups. Enable MFA, safe sessions, and step-up authentication when needed. Use access control rules per user group, application, or route. Support for invitations, recovery, and user lifecycle automation is available. Because it is policy-driven, authorization stays consistent. You get audit information that helps security teams investigate events. Strong rate limiting and brute-force protections reduce risk. Session management improves usability without sacrificing safety. You can tune settings for your threat model and compliance needs. Choose Authelia when you want an Auth0-like experience on your own stack. It helps you replace custom login code with maintained components. The setup fits both cloud and private deployments in Europe. Developers appreciate clear configuration and predictable behavior. Operations teams gain visibility, control, and portability over time.