8 Best European Alternatives to Auth0 (2026), Compared

The best European alternative to Auth0 is Hanko (Germany): a hosted login service with passkeys, social login and MFA, a free plan for 10,000 monthly active users and open-source code you can self-host. If you need the full enterprise feature set of Keycloak – SAML, LDAP, identity brokering – run by a European team, pick Cloud-IAM from Rennes, France.

I wrote this ranking for developers and product teams who use Auth0 – or were about to – and want their users’ logins with a European company instead. Auth0 is run by Auth0, LLC, which is wholly owned by Okta, Inc. of San Francisco, and Okta’s privacy policy says personal data may be transferred to and stored in the United States. For a login service that holds every user account of your app, that matters. I compared fifteen identity providers with European roots and kept eight. For each one you get who is behind it, where it runs, what it costs and how much of Auth0 you keep.

What are the best European alternatives to Auth0?

If you only have a minute: these are the European identity providers I would move to from Auth0, in order. Each one is reviewed below.

1. Hanko (Germany) – hosted, developer-first login with passkeys and a free plan for 10,000 MAU. Best for most apps leaving Auth0.
2. Cloud-IAM (France) – fully managed Keycloak on AWS or European clouds. Best for enterprise SSO and LDAP.
3. cidaas (Germany) – a complete CIAM platform hosted in Germany. Best for large consumer platforms.
4. Quasr (Belgium) – self-service CIAM with pay-as-you-go pricing. Best for European start-ups.
5. Bare.ID (Germany) – Keycloak-based IAM in German data centres. Best for German compliance needs.
6. Curity (Sweden) – an identity server you run yourself, with a free Community edition. Best for self-hosting.
7. Login-Master (Germany) – Keycloak as a service with delegated administration. Best for B2B portals.
8. Nevis (Switzerland) – passwordless authentication for banks and insurers. Best for regulated industries.

Auth0 alternatives compared

Prices from public pricing pages. Affiliate links and sponsored placements are labelled.

“Data hosted in” shows where each provider says it runs its identity service; the hosting lines on each tool add a DNS and ASN lookup of its website (25 Oct 2026). Curity runs in your own infrastructure.

How I compared the Auth0 alternatives

I looked at fifteen identity and access management services with European roots and kept eight. The order follows how much of Auth0 you keep after switching – a hosted service, self-service sign-up, SDKs, social login, MFA and enterprise SSO – then sovereignty, then price. I weighed five things:

• Jurisdiction and ownership – where the company is registered, who owns it and whether the contracting entity is European.
• Feature match with Auth0 – hosted login, social and enterprise connections (OIDC, SAML), MFA, passkeys, user management and APIs.
• Hosting – the country of the data centres and whether the service runs on a US cloud such as AWS.
• Price – a free plan, the first paid plan and how the price grows with monthly active users (MAU).
• What users say – Trustpilot ratings where a profile exists, read together with the number of reviews.

I left out ZITADEL, which was started in Switzerland but now lists its headquarters in San Francisco; Ory, whose data controller is Ory Corp in Scottsdale, Arizona, with a German company only as its EEA representative; authentik, sold by Authentik Security Inc.; and Logto, which names Silverhand Inc. and no European entity. Keycloak itself is an open-source project of the Cloud Native Computing Foundation and a trademark of Red Hat, so I list the European companies that run it for you instead. Corbado (Munich) adds passkeys on top of an existing provider such as Auth0 rather than replacing it, and Scaleway IAM only controls access to Scaleway’s own cloud. All data comes from the providers’ own pricing, legal, privacy and product pages, GitHub and Trustpilot, checked on 25 October 2026.

The best European alternatives to Auth0, reviewed

Each provider gets the same treatment: who is behind it, what users say, what you keep and lose from Auth0, and who should switch.

1. Hanko

The closest European match for Auth0’s developer experience – hosted, open source and free for 10,000 users

Hanko is made by Hanko GmbH in Kiel, Germany, led by its founder and CEO Felix Magedanz. In 2023 adesso ventures led a single-digit million investment, joined by existing investors High-Tech Gründerfonds and Smart Infrastructure Ventures. Hanko Cloud runs only in the AWS Frankfurt region – data stays in Germany, but on a US cloud. The website is served through Cloudflare.

What users say. Hanko has a Trustpilot profile but no reviews yet. Its main repository on GitHub has 9,000 stars, a sign of an active developer community.

What it replaces from Auth0 – and what it doesn’t. You keep a hosted login with passkeys, passwords, email passcodes, social login, MFA with security keys and authenticator apps, a custom domain and an admin dashboard. Hanko Elements gives you drop-in login and profile components; Pro adds webhooks and an admin API. What you lose: SAML SSO costs $49 a month per connection, the free plan has two projects, and the hosted service depends on AWS. The backend is AGPL-3.0, so self-hosting inside a closed product may need Hanko’s commercial licence.

Facts: HQ Germany (Kiel) · free plan: yes (10,000 MAU, 2 projects) · Pro $29/month incl. 10,000 MAU, then $0.01 per MAU · SAML SSO $49/month per connection · Startup plan free up to one million MAU on application · open source (AGPL-3.0 backend, MIT frontend) · hosted in AWS Frankfurt.

Switching from Auth0: moderate – the concepts map well and the free plan lets you build it in parallel, but you replace Auth0’s SDK calls with Hanko Elements or its API.

My take: Hanko keeps the most of what made Auth0 popular: a hosted login you can set up in an afternoon, a real free tier and modern passkeys – and it is far cheaper as you grow. The catch is AWS: if a US cloud is a dealbreaker, look at Cloud-IAM on Scaleway or Outscale, or cidaas. Best for: start-ups and SaaS teams that want Auth0's ease without a US vendor. Not for: teams that need a provider free of US clouds.

Visit hanko.io →

2. Cloud-IAM

Keycloak without the operations work – managed by a French team, on European or global clouds

Cloud-IAM SAS is registered in Rennes, France, and has run managed Keycloak since 2018. It is owned by a joint venture of ELLIXO SAS and FGRibreau SARL, the company of François-Guillaume Ribreau. You choose where your Keycloak cluster runs: AWS, Google Cloud or Azure worldwide, or Scaleway and 3DS Outscale in Europe. The free plan runs on AWS only, and the website is served through Amazon CloudFront.

What users say. On Trustpilot Cloud-IAM has 4.6/5 from 17 reviews – the best rating in this list, but from a small sample. Cloud-IAM says it serves more than 500 customers.

What it replaces from Auth0 – and what it doesn’t. Keycloak covers almost everything Auth0 does: single sign-on, MFA, social login, identity brokering, LDAP and Active Directory, OpenID Connect, OAuth 2.0 and SAML, password policies and a full REST API. Cloud-IAM handles upgrades, backups and monitoring, supports Terraform and full data export, and offers up to a 99.98% SLA. What you lose: Keycloak’s login pages and admin console are more technical than Auth0’s, there are no polished drop-in SDKs, and paid plans start at €225 a month.

Facts: HQ France (Rennes) · since 2018 · free plan: yes (100 users, 1 realm, AWS, no backups) · Starter from €225/month, Essential €495, Premium €1,440 · 10% off yearly · ISO 27001:2022 certified · SecNumCloud 3.2 and HDS on Outscale · priced by total user accounts, not MAU.

Switching from Auth0: moderate – Keycloak speaks the same standards, and Cloud-IAM offers migration support, but you rebuild your rules and login pages in Keycloak.

My take: If your Auth0 use is mostly enterprise SSO and federation, Keycloak gives you more for less, and Cloud-IAM runs it for you. On Scaleway or Outscale your identity data never touches a US provider. It sits second because the developer experience is rougher than Hanko’s and the first paid plan is a big step. Best for: B2B SaaS and enterprises that need SAML, LDAP and full control. Not for: small apps that want a cheap, plug-and-play login.

Visit cloud-iam.com →

3. cidaas

A full customer identity platform, developed and hosted in Germany

cidaas is a product of Widas ID GmbH in Wimsheim near Pforzheim, Germany, part of the Widas group, which has built software since 1997 and has more than 100 employees. cidaas says it is hosted in Germany and the EU and independent of US hyperscalers, with ISO 27001-certified operation. KuppingerCole named it in its Leadership Compass 2026. The marketing website runs at Hostinger.

What users say. cidaas has no reviews on Trustpilot. cidaas says it serves more than 500 customers and over one billion users.

What it replaces from Auth0 – and what it doesn’t. cidaas matches Auth0’s enterprise tier closely: SSO, passwordless login, risk-based and step-up MFA, consent management, progressive profiling and authorisation with RBAC and OPA, plus ID document checks. What you lose: there is no permanent free plan – only a 30-day trial with 500 users – and the first paid plan costs €699 a month.

Facts: HQ Germany (Wimsheim) · free plan: no, 30-day trial (500 users) · Essentials €699/month (1,000 users), Standard €1,399 (5,000), Pro €2,999 (1,000,000) · 20% off yearly · workforce IAM €4.50 per user · ID checks from €1.50 · hosted in Germany/EU · ISO 27001-certified operation.

Switching from Auth0: moderate – standard OIDC makes the app side easy; plan a project for user migration and flows.

My take: cidaas is the most complete German answer to Auth0 Enterprise, and the one with the clearest stance against US clouds. For a big B2C platform with compliance needs, the price is reasonable. For a small app it is far too expensive, which is why it sits third. Best for: large consumer platforms that need German hosting and enterprise CIAM. Not for: start-ups and side projects.

Visit cidaas.com →

4. Quasr

A Belgian CIAM for developers, with pay-as-you-go pricing and a free start-up plan

Quasr BV is registered in Antwerp, Belgium (company number 0779.655.316), and calls itself a European, ethical and user-centric CIAM platform. Quasr says the platform runs within the EU; its privacy policy says its databases are hosted by third parties in the United States and the EU, without naming them. The website runs on Amazon CloudFront.

What users say. Quasr has no reviews on Trustpilot. It publishes a Trust Center for security documents.

What it replaces from Auth0 – and what it doesn’t. Quasr is built for the same buyer as Auth0: developers who sign up and start building. Every plan includes all features, it counts multi-tenant use (Monthly Active Tenants) as well as users, and there is no credit card needed to start. What you lose: Quasr is a small company, its pricing page lists only the free allowances – 100 monthly active accounts and 3 tenants on pay-as-you-go – and not the per-user price above them, and the hosting providers are not named.

Facts: HQ Belgium (Antwerp) · free plan: yes (100 monthly active accounts, 3 tenants) · Startup plan €0 with 25,000 accounts and 100 tenants for European early-stage companies · Enterprise with SLA on request · Belgian law and Antwerp courts in the terms.

Switching from Auth0: moderate – a similar developer model, but a smaller ecosystem of guides and SDKs.

My take: Quasr is the most Auth0-like model among the smaller European providers, and its start-up plan is very generous. I would like to see the per-user prices and the hosting providers on the website before trusting it with a large user base. Best for: European early-stage start-ups that qualify for the free plan. Not for: teams that need published prices and a long track record.

Visit quasr.io →

5. Bare.ID

Keycloak-based IAM, run in German data centres with ISO 27001 and BSI C5

Bare.ID GmbH is based in Wiesbaden, Germany (HRB 33190), and started inside the AOE Group, a technology company with more than 250 employees. Development, operation and support happen in Germany, and all data is processed in German data centres certified to ISO 27001 and BSI C5. The website is served through Cloudflare.

What users say. Bare.ID has no reviews on Trustpilot.

What it replaces from Auth0 – and what it doesn’t. Bare.ID builds on Keycloak: SSO over OIDC and SAML, MFA, user federation and lifecycle management, as SaaS, hybrid or on-premises, and you pay only for users who logged in that month. What you lose: there is no self-service free plan, the pricing page is hard to read, and it is aimed at companies rather than individual developers.

Facts: HQ Germany (Wiesbaden) · free plan: no, free trial with full features · plans from $99/month on the pricing page, billed per monthly active user · 12- or 36-month terms, invoice or SEPA · 99.9% availability · German data centres, ISO 27001 and BSI C5.

Switching from Auth0: moderate – standard protocols, with Bare.ID’s team helping on proofs of concept.

My take: Bare.ID is a solid choice if your auditors ask for BSI C5. It is sales-led, so it fits a company IAM project better than a quick Auth0 swap. Best for: German companies that need BSI C5 hosting and Keycloak compatibility. Not for: developers who want to sign up and build right away.

Visit bare.id →

6. Curity

A Swedish identity server you run yourself – free Community edition, unlimited users

Curity AB was founded in Stockholm in 2015 by identity specialists, including CTO Jacob Ideskog. Its Curity Identity Server is deployed in your own environment, on-premises or in the cloud of your choice, so you decide where the data lives. Customers include PagerDuty, Santander, Tele2 and Telenor. The website runs on Microsoft Azure.

What users say. Curity has no reviews on Trustpilot.

What it replaces from Auth0 – and what it doesn’t. Curity is a complete OAuth and OpenID Connect server with strong API security, including token handling for single-page apps. The free Community edition has unlimited users, social login and the full OAuth server. What you lose: you run, scale and patch it yourself, and paid editions have no public price.

Facts: HQ Sweden (Stockholm) · founded 2015 · free plan: yes (Community edition, self-hosted, unlimited users) · Standard and Enterprise: flat annual subscription with unlimited users, price on request · SAML IdP and 24/7 support in Enterprise.

Switching from Auth0: hard – you take over operations that Auth0 did for you.

My take: Curity is the most sovereign option here because it runs where you put it, but it replaces Auth0’s product, not its service. Best for: teams with ops capacity that want full control and strong API security. Not for: anyone who chose Auth0 to avoid running servers.

Visit curity.io →

7. Login-Master

Keycloak as a service with delegated administration – made and hosted in Germany

Login-Master comes from intension GmbH in Ostfildern near Stuttgart, Germany, and is sold through the Login Alliance, an IAM network founded by Syntlogo and intension. The SaaS version is made and hosted in Germany, and the website runs at netcup.

What users say. Login-Master has no reviews on Trustpilot.

What it replaces from Auth0 – and what it doesn’t. Login-Master adds B2B features to Keycloak: delegated administration so your customers manage their own users, approval workflows, data synchronisation and audit logging. What you lose: there is no free plan or self-service sign-up, it starts at €900 a month, and the website names no certifications.

Facts: HQ Germany (Ostfildern) · free plan: no, live demo and test environment · Extended from €900/month (up to 1,000 users), Advanced from €1,840/month (up to 10,000) · longer terms are cheaper · SaaS or self-hosted.

Switching from Auth0: moderate – a consulting-led project with the vendor.

My take: Login-Master suits B2B portals with complex user administration, but it is a project, not a sign-up. Best for: B2B portals where customers manage their own users. Not for: developers who want to start for free.

Visit login-master.com →

8. Nevis

Swiss passwordless authentication trusted by banks – enterprise only

Nevis Security AG is based in Zurich, Switzerland, with companies in Berlin, Budapest and London and more than 100 employees. Nevis says its technology secures over 80% of Swiss online banking transactions. It offers the Nevis ID platform and the Nevis Authentication Cloud, a SaaS for passkeys and MFA. The website runs on HubSpot behind Cloudflare.

What users say. Nevis has no reviews on Trustpilot.

What it replaces from Auth0 – and what it doesn’t. Nevis covers CIAM for regulated industries: MFA, single sign-on, fraud detection, passkeys and transaction confirmation. What you lose: there is no self-service, public price or free trial, and Nevis does not say where its cloud is hosted.

Facts: HQ Switzerland (Zurich) · free plan: no · pricing on request · SaaS and platform · SOC 2 Type 2 and ISO badges on its website · focus on banking, insurance, healthcare and iGaming.

Switching from Auth0: hard – an enterprise project with sales and integration work.

My take: Nevis competes with Auth0 at large financial institutions, not for indie apps. Everyone else should start with Hanko or Cloud-IAM. Best for: banks, insurers and healthcare providers. Not for: developers and start-ups.

Visit nevis.net →

What European identity providers cost compared with Auth0

Auth0’s paid plans start small – Essentials includes 500 MAU for $35 a month. European providers either charge per user like Hanko, or sell packages like cidaas and Cloud-IAM.

Prices as shown on each provider’s pricing page on 25 October 2026, in the currency shown there, excluding VAT where stated. Bare.ID’s pricing page lists conflicting plan limits – confirm with sales.

How to switch from Auth0 to a European identity provider

1. List what you use in Auth0. Connections (social, SAML, database), Actions, MFA, Organizations and machine-to-machine apps – this decides which provider fits.
2. Set up the new tenant in parallel. Use the free plan or trial and connect a staging copy of your app over OpenID Connect.
3. Export and import your users. Plan how password hashes move; where they cannot, use passkeys, email codes or a password reset on first login.
4. Move your social and enterprise connections. Update the redirect URLs at Google, Apple, Microsoft and your customers’ identity providers.
5. Switch traffic and keep Auth0 for a while. Route new logins to the new provider and keep the Auth0 tenant read-only until every active user has signed in once.

Auth0 alternatives: FAQ

My verdict: which European identity provider to switch to

Most teams leaving Auth0 should start with Hanko: it keeps the hosted, developer-first experience, the free plan covers 10,000 users and growth costs a cent per user. If you want no US cloud at all, or you need SAML, LDAP and identity brokering, choose Cloud-IAM on Scaleway or Outscale. Large consumer platforms with compliance teams should look at cidaas, and European start-ups should check whether they qualify for Quasr’s free start-up plan.

Whichever you pick, run it in parallel with Auth0 first and move users as they log in – that keeps the switch invisible to them.