Authentication
5 EU-headquartered authentication companies on EU Alts — including Idura, Curity, and Hanko. Every listed provider is founded or based in Europe, giving you a GDPR-compliant authentication option that is not subject to the US CLOUD Act.
- Idura✓ Verified by EU Alts
Danish eID authentication and e-signature platform (formerly Criipto) — integrates MitID, Norwegian and Swedish BankID and the Finnish Trust Network.
- Curity✓ Verified by EU Alts
Swedish identity and API access platform. OAuth and OpenID Connect infrastructure for organisations where security and control are non-negotiable.
- Hanko✓ Verified by EU Alts
Open-source passkey and passwordless authentication from Kiel, Germany. Made and hosted in Europe, with self-hosting available.
- cidaas✓ Verified by EU Alts
German cloud identity and access management (CIAM) platform — made and hosted in Germany, with dedicated German server locations for regulated sectors.
FjordID✓ Verified by EU AltsManaged OIDC/OAuth2 identity platform hosted on Hetzner in Germany. Drop-in Auth0 replacement with EU data residency and zero US subprocessors.
Frequently asked questions
What are the best EU-built Authentication tools?
EU Alts lists 5 EU-headquartered Authentication companies — including Idura, Curity, and Hanko. All are founded or based in Europe (from Germany, Denmark, and Norway), giving you GDPR-compliant alternatives to US Authentication software with data stored within EU jurisdiction.
Which Authentication startups should I shortlist first?
Three picks worth shortlisting first: Idura (Denmark) — Danish eID authentication and e-signature platform (formerly Criipto) — integrates MitID, Norwegian and Swedish BankID and the Finnish Trust Network.; Curity (Sweden) — Swedish identity and API access platform. OAuth and OpenID Connect infrastructure for organisations where security and control are non-negotiable.; Hanko (Germany) — Open-source passkey and passwordless authentication from Kiel, Germany. Made and hosted in Europe, with self-hosting available..
Are Authentication tools from EU companies GDPR-compliant?
EU-headquartered Authentication providers are subject to the GDPR by default and cannot be compelled to hand over your data under the US CLOUD Act. The Authentication startups on this page are based from Germany, Denmark, and Norway, all within EU jurisdiction, which makes them a safer default for European businesses handling personal data.
How do I switch to a GDPR-compliant Authentication alternative?
Start by identifying which EU-based Authentication tools match your feature requirements from the list above. Most EU providers offer free trials and data migration guides to help you move from US-based incumbents. For a Authentication switch specifically, check what data export formats your current tool supports and whether the EU alternative offers an importer.