Best Free Alternatives to Auth0
Tired of paywalls, subscription price hikes, or forced cloud accounts? Here are 6 verified free & open-source alternatives to Auth0 with generous free tiers or local self-hosting.
The leading free and open-source alternative to Auth0 is Lucia: Flexible and lightweight open-source authentication and session handling resource for modern web applications.. DevShelf indexes 6 community-verified alternatives to Auth0 with generous free tiers, local offline mode, or self-hosted deployment.
| Alternative Tool | Category | Pricing Model | Language / Stack | Details |
|---|---|---|---|---|
| Lucia | Authentication & Security | 100% Free & Open Source | Multi-platform | Specs → |
| SuperTokens | Authentication & Security | Free self-hosted community edition; Free cloud tier up to 5,000 MAU | Multi-platform | Specs → |
| Logto | Authentication & Security | Free self-hosted version; Free cloud tier for up to 50k MAU | Multi-platform | Specs → |
| Keycloak | Authentication & Security | 100% Free & Open Source Apache-2.0, self-hostable | Multi-platform | Specs → |
| Zitadel | Authentication & Security | 100% Free Open Source self-hosted; Free cloud tier with 25k requests/mo | Multi-platform | Specs → |
| Ory Kratos | Authentication & Security | 100% Free & Open Source Apache-2.0 | Multi-platform | Specs → |
Lucia
Authentication & SecurityFlexible and lightweight open-source authentication and session handling resource for modern web applications.
SuperTokens
Authentication & SecurityOpen-source alternative to Auth0 and Firebase Auth providing passwordless, social login, session management, and user roles.
Logto
Authentication & SecurityModern open-source identity and access management infrastructure with OIDC, OAuth 2.0, and pre-built sign-in UI.
Keycloak
Authentication & SecurityOpen source identity and access management solution for modern applications and services, supporting OpenID Connect and SAML.
Zitadel
Authentication & SecurityOpen source identity infrastructure with turnkey authentication, audit logs, multi-tenancy, and passkeys.
Ory Kratos
Authentication & SecurityCloud-native user management system and identity provider implementing login, registration, MFA, and social auth.
💬 Frequently Asked Questions about Auth0 Alternatives
What is the best free alternative to Auth0? ▼
The leading free and open-source alternative to Auth0 is Lucia. Flexible and lightweight open-source authentication and session handling resource for modern web applications.
Are there open-source alternatives to Auth0? ▼
Yes, DevShelf indexes 6 verified free and open-source alternatives to Auth0, including Lucia, SuperTokens, Logto.
Why switch from Auth0 to an open-source tool? ▼
Switching to open-source alternatives to Auth0 eliminates recurring subscription costs, vendor lock-in, and account limits while allowing full self-hosting and data privacy.
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