11 Best European Auth0 Alternatives in 2026

Hanko is an open-source authentication and user management platform from Kiel, Germany, built as a modern, privacy-first alternative to Auth0, Clerk, and Cognito. It puts passkeys front and centre while still supporting passwords, passcodes, and OAuth social logins.

Developers get Hanko Elements, a set of framework-agnostic Web Components that drop into any frontend in minutes, plus a full backend API for custom flows. The Passkey API can also be bolted onto existing auth systems without a full migration.

Key features:

• Passkey-first authentication with FIDO2-certified, phishing-resistant biometric login
• Multiple auth methods including passwords, email passcodes, OAuth (Google, Apple, GitHub), and 2FA
• Hanko Elements, framework-agnostic Web Components for React, Vue, Angular, and more
• Flexible hosting, either self-hosted (AGPLv3) or Hanko Cloud with no lock-in migration
• User management with profiles, sessions, and audit logs out of the box
• GDPR compliant with EU infrastructure and data minimalism by design

Trusted by 10,000+ developers and used in production by SAP and Volt.io. The core is fully open source under AGPLv3 and MIT licences, with GitHub stars growing fast.

ZITADEL is an open-source identity infrastructure platform that combines the flexibility of self-hosting with the convenience of a managed cloud, bridging enterprise authentication and developer-friendly APIs in a single product.

The platform handles the full identity lifecycle: login pages, social logins, SSO, MFA, passkeys, RBAC, machine identities, and multi-tenancy, all configurable through gRPC and REST APIs. ZITADEL Actions let teams run custom workflows after any auth event without writing a custom server.

Key features:

• Authentication with hosted login UI, social logins, passkeys, MFA, and SSO
• Authorization via role-based access control with fine-grained permission management
• Multi-tenancy to add new organisations, delegate admin rights, and isolate data per tenant
• Machine identities covering service accounts and API key management for non-human actors
• Extensible through ZITADEL Actions that execute serverside logic after any auth event
• APIs built on modern gRPC and REST, with SDKs for Go, Angular, React, Next.js, Flutter, and Python
• Compliance spanning OpenID certification, ISO 27001, GDPR, and SOC 2 Type II

Open source with 4,000+ GitHub stars and 50+ contributors. Deploy to your own infrastructure or use ZITADEL Cloud with EU data residency.

Cloud-IAM is a fully managed Keycloak service that takes the operational burden out of identity and access management. Deploy a production-grade Keycloak instance in under 20 minutes, without managing infrastructure, patches, or backups.

Founded in 2019 and headquartered in Europe, Cloud-IAM serves 500+ customers with 20M+ managed users across a 100% in-house European team. The service spans 70+ regions across AWS, Google Cloud, Azure, Scaleway, and Outscale, giving teams the cloud provider and data residency they need.

Key features:

• Instant deployment with fully provisioned Keycloak in 20 minutes, free to start
• Multi-cloud reach across 70+ regions and 5 providers (AWS, GCP, Azure, Scaleway, Outscale)
• High availability backed by a 99.95% SLA and 99.9834% measured uptime in 2025
• Standards-based with OAuth 2.0, OpenID Connect, SAML, and custom SPI support
• Data portability via full import/export for complete credential sovereignty
• 24/7 European support from an on-call team based entirely in Europe
• Compliance spanning ISO 27001:2022, SOC 2 Type 2, GDPR, NIS 2, HDS, and SecNumCloud 3.2

Built on Keycloak (Red Hat-backed open source), Cloud-IAM adds enterprise reliability, SLA guarantees, and European support without the ops overhead.

Ubisecure is a Finnish identity and access management company providing enterprise CIAM (Customer Identity and Access Management) for organisations across Europe. The platform covers three identity layers: individual users, legal entities (organisations), and B2B partner networks.

Deployable as cloud IDaaS, on-premises Identity Server, or hybrid, Ubisecure supports complex identity relationships, including delegation and B2B supply chain access, alongside standard SSO, MFA, and passwordless flows.

Key features:

• Individual ID covering user registration, SSO, MFA, and passwordless (bank IDs, eIDs, authenticator apps)
• Organisation ID with Legal Entity Identifiers (LEI), verifiable credentials, and GLEIF-accredited LEI issuance
• B2B Identity for Know-Your-Business onboarding and partner network access management
• Zero Trust ready with adaptive access policies across applications and APIs
• Flexible deployment as cloud IDaaS, on-premises, or hybrid
• Azure Active Directory integration and 500+ certified IAM professionals via their academy
• ISO 27001 certified and GDPR compliant

Used by Telia Company, DNA Telecom, Brighton & Hove City Council, and Citi. Ubisecure is one of Europe's most established CIAM vendors, combining deep IAM expertise with EU-native data practices.

Ory is an open-source identity and access management platform built for modern, cloud-native architectures. Its modular, headless design lets teams compose exactly the identity stack they need, from customer login flows to B2B delegated access to machine identities for AI agents.

The Ory ecosystem includes Kratos (identity management), Hydra (OAuth 2.0/OIDC server), Keto (permissions), and Oathkeeper (reverse proxy). Each can be deployed independently or combined via Ory Network, the fully managed SaaS. With stateless horizontal scaling, the platform is proven at 2.5+ billion identities.

Key features:

• CIAM, B2B IAM, Workforce IAM, and Agent IAM with purpose-built flows for each use case
• Headless architecture that lets you bring your own UI and integrate into any stack
• Modular OSS components spanning Kratos, Hydra, Keto, and Oathkeeper (Apache 2.0)
• Ory Network, a fully managed cloud with zero-ops deployment
• Trillion-scale stateless horizontal scaling with full observability
• AI agent identities purpose-built for securing non-human actors
• Enterprise license for on-premises deployment with premium support

Used by OpenAI, Société Générale, Mistral AI, Axel Springer, and commercetools. The full stack is open source, auditable, and self-hostable, with Ory Network for teams that want a managed option.

cidaas (Cloud Identity and Access Service) is a German-built IAM platform from the Widas Group, designed to unify identity management for customers, employees, partners, and IoT devices, all from a single European cloud.

Spanning CIAM, workforce IAM, and API security, cidaas covers the full identity lifecycle with SSO, passwordless authentication, MFA, AI-powered identity verification, and GDPR-native consent management. Its integration layer connects to the cnips iPaaS platform, and the platform is built on open standards for interoperability.

Key features:

• Single Sign-On for seamless cross-application access with OIDC and OAuth 2.0
• Passwordless authentication via passkeys, magic links, and biometric login
• Adaptive MFA, risk-based multi-factor with multiple authenticator options
• AI identity verification covering document validation and liveness checks
• Policy-based authorisation for dynamic, role-driven access control
• Consent management with GDPR-compliant data handling and audit trails
• API security through access management and token governance
• 1B+ identity scale deployed across 182+ countries

Made and hosted entirely in Germany. Customers include Kaufland, Europa-Park, ProSiebenSat.1, EWE AG, and Creditplus Bank.

Engity is a European Customer Identity and Access Management (CIAM) platform built for developers who need secure, flexible user authentication without the overhead of running identity infrastructure. Headquartered in Munich, Germany, the platform is fully managed, GDPR-compliant, and architected for multi-tenancy.

The platform supports the full spectrum of modern auth: classical username/password, social logins, enterprise SSO, magic links, biometrics, passkeys, and MFA, with real-time push notifications and breached password detection baked in.

Key features:

• Passwordless options spanning magic links, passkeys, and biometrics
• Social and enterprise login via social OAuth and enterprise SSO connectors
• Multi-factor authentication with TOTP, push notifications, and hardware keys
• Multi-tenancy through isolated tenant databases with full per-tenant customisation
• DeviceAuth for keyboardless login in device-constrained environments
• Breached password detection running real-time checks against compromised credential lists
• Serverside webhooks to customise flows and integrate with existing systems
• GDPR compliant with European data sovereignty and EU hosting

Open to open source: Engity maintains Bifröst, an SSH server connector contributed back to the community. Suitable for SaaS platforms, digital products, and regulated industries needing flexible identity flows.

bare.ID is a German Single Sign-On and identity management platform built on Keycloak, delivered as SaaS, hybrid, or self-hosted. The company describes it as "the only completely sovereign Open-Source based Single Sign-On solution from Germany."

Every component of the supply chain is German: hosting, support, and development. The platform extends Keycloak with a proprietary UI, a pre-configured application gallery for rapid integration, and enterprise-grade reliability through a multi-node, multi-datacenter architecture.

Key features:

• SSO and federation via OIDC and SAML across all applications
• Multi-factor authentication covering OTP, FIDO2 hardware tokens, and facial recognition
• White-label UI with fully customisable login pages and branding
• Application gallery of pre-configured connectors for rapid integration
• External identity sources including Active Directory and REST API federation
• 99.9% uptime SLA on multi-node, multi-datacenter German infrastructure
• Open source foundation built on Keycloak (Red Hat), auditable and portable
• Compliance with ISO 27001 certification, GDPR, and NIS2

Trusted by Deutsche Telekom, Congstar, Deutsche Sporthilfe, Rheinbahn, and Swissbit AG. Pricing is available on tiered plans, with details on their tariffs page.

Curity is a Swedish identity server built for securing APIs, web apps, AI agents, and human users on a single platform. Positioned at the enterprise end of the market, Curity is used by financial services, healthcare, government, and telco organisations that need standards-compliant, high-assurance identity.

The platform combines authentication, intelligent token issuance, user lifecycle management, and API security in a deployable package, available on-premises, in the cloud, or as hybrid. A free Community Edition makes it accessible for teams evaluating enterprise identity architecture.

Key features:

• Authentication spanning passwordless, passkeys, SSO, MFA, social logins, and adaptive flows
• Token Service offering intelligent OAuth 2.0 and OIDC token issuance with fine-grained policy
• API Security that provides high-grade API and SPA protection with token introspection
• AI agent identities purpose-built for securing non-human actors in agentic workflows
• Decentralised identity with digital wallets and verifiable credentials support
• User Journey Orchestration for adaptive authentication with branding controls
• Compliance backed by SOC 2 Type 2 and ISO/IEC 27001 certification, plus FAPI conformance

Customers include Dun & Bradstreet, ICA, Santander, Volvo Finans, and PagerDuty. Multiple deployment options with a Community Edition available for evaluation.

Memority is a French enterprise Identity and Access Management (IAM) platform that manages digital identities and controls access across employees, partners, clients, and non-human identities. Their "Identity Factory 360°" suite integrates IGA, SSO/federation, MFA, and CIAM into a single managed service.

The platform is built for large organisations, with deployments at enterprises managing 1.5M+ identities, and covers both cloud and on-premises applications. Memority recently (March 2026) acquired Zygon to add AI-powered identity visibility capabilities to the platform.

Key features:

• MY-Identity for identity lifecycle governance and automated rights provisioning
• MY-Access covering user authentication, SSO, federation, and adaptive access control
• MY-Keys for MFA deployment and management across the organisation
• IGA providing identity governance and administration with automated role management
• CIAM managing customer identity for external-facing digital products
• Cloud and on-premises hybrid deployment for regulated industries
• French Tech 2030 backing from France's national tech initiative

Trusted by Stellantis, Valeo, Safran, Galeries Lafayette, Solvay, and Eiffage, all major French and European enterprises in automotive, aerospace, retail, and energy sectors.