Auth0 alternatives
Identity platform for authentication, authorization, SSO, and social login in apps.
Auth0 compared with its alternatives on free plan, learning curve and setup time
 Auth0This toolIdentity platform for authentication, authorization, SSO, and social login in apps. | — | Medium | 5 minutes |
 Auth.jsOpen-source authentication library for Next.js and modern JavaScript frameworks. | Yes | Easy | 5-10 minutes |
 KeycloakOpen-source identity broker with SSO, OIDC, SAML, and user federation for enterprises. | Yes | Medium | 30 minutes to 2 hours depending on deployment method |
 Better AuthTypeScript authentication framework with plugins for sessions, OAuth, and passkeys. | Yes | Medium | Quick setup with CLI initialization |
 ClerkComprehensive authentication and user management platform designed for modern web applications. | Yes | Easy | 5-10 minutes |
 JWTJSON Web Token standard for compact, signed claims used in stateless API authentication. | Yes | Easy | — |
 WorkOSModern API platform that enables developers to quickly add enterprise features to their applications. | Yes | Easy | Minutes for basic SSO integration |
| — | — | — | |
| Yes | Easy | — | |
 BuilderBoxBuilder Box helps developers launch full-stack SaaS apps faster with ready-to-use auth, payments, and AI tools. | No | Medium | 15-30 minutes |
 GravityGravity helps you launch a SaaS fast with auth, payments, and dashboards ready. | Yes | Medium | Minutes with setup wizard; full SaaS running in hours |
| Yes | Easy | Minutes to get started | |
| Yes | Medium | Under 5 minutes to get started; MVP deployable in days |
How these alternatives were chosen
Tools Auth0 names as alternatives that this directory also publishes, followed by others in Auth. The order is not a ranking, and "—" means we have not checked that field — not that the answer is no.
Auth0 also lists Okta, Firebase Authentication, Amazon Cognito, Microsoft Entra ID as alternatives. Those are not in this directory yet, so there is nothing to compare — and nothing to link to.