The authentication glue you need.
Alternatives
Open source alternatives to Auth0
Tools whose README metadata names Auth0 as a product they can replace.
Authentication and authorization infrastructure for SaaS and AI apps, built on OIDC and OAuth 2.1 with multi-tenancy, SSO, and RBAC.
Open source Auth0/Clerk/Firebase alternative. Passkeys, SSO, MFA, passwordless, biometric login. Self-hosted or cloud. Enterprise-ready for SaaS & mobile apps
ZITADEL - Identity infrastructure, simplified for you.