Best Auth0 Alternatives
Hosted authentication and identity-as-a-service provider. SaaS teams replace Auth0 when Monthly Active User (MAU) renewals jump 5x or enterprise SAML/SCIM connections incur steep add-on fees.
Security · Markdown Spec
- Keycloak — CNCF graduated enterprise open-source IAM for OIDC, OAuth 2.0, and SAML 2.0 (Score: 82.9, Free & Open Source, Apache-2.0)
- authentik — Flexible MIT-licensed identity provider with visual flow-based auth policies (Score: 75.6, Open Core, MIT)
- Better Auth — Comprehensive MIT-licensed TypeScript authentication framework in your own DB (Score: 73.0, Free & Open Source, MIT)
- ZITADEL — Single-binary Go multi-tenant B2B identity infrastructure built on Postgres (Score: 65.9, Open Core, Apache-2.0)
- Ory Kratos — Cloud-native headless identity, session, and passkey management in Go (Score: 57.9, Open Core, Apache-2.0)