Auth.js (NextAuth) is a library you host and maintain — with experimental passkeys, no built-in advanced MFA and no built-in multi-tenancy. Tuurio ID is a managed identity provider that ships all three, EU-hosted.
Auth.js (NextAuth) is a popular open-source library, but it is code you host and keep running. Passkey support is still experimental, advanced MFA and audit features are not built in, and there is no built-in multi-tenancy — you design realm-per-tenant or shared-realm yourself. For new projects in 2026, that maintenance burden adds up.
Tuurio ID is a managed identity provider on standard OpenID Connect. Enforceable MFA, phishing-resistant passkeys and multi-tenant organizations are included, hosted in Germany with an Art. 28 GDPR data-processing agreement. You keep your app and stop maintaining auth plumbing.
Stop maintaining a library; get MFA, passkeys and multi-tenant as a service.
A managed service handles patching, sessions and upgrades for you.
Enforceable MFA and stable passkeys, not experimental.
Organizations and tenant isolation without DIY realm design.
Hosted in Germany, GDPR-compliant with a data-processing agreement.
How a managed identity provider compares to a self-hosted auth library.
| Criterion | Auth.js / NextAuth | Tuurio ID |
|---|---|---|
| Type | library, self-hosted | managed service |
| MFA | do it yourself / limited | included, enforceable |
| Passkeys | experimental | included |
| Multi-tenant | do it yourself | yes |
| Maintenance | your responsibility | managed |
| Hosting | your infrastructure | Germany (EU) |
Last reviewed: June 2026. Public competitor information can change; verify plan details and legal terms before deciding.