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Auth0

Okta's developer-focused identity platform for adding login, SSO and user management to apps.

Free plan + paidAuthentication providers
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About Auth0

Auth0 is a hosted customer identity service: you redirect users to its Universal Login page or embed its SDKs, and it handles passwords, social logins, passwordless, multi-factor authentication, enterprise SSO and user storage. It has been part of Okta since 2021 and is one of the most widely used auth services, so SDKs, quickstarts and community answers exist for nearly every language and framework. Actions let you run custom JavaScript during login and sign-up flows, and the B2B plans add organisations, self-service SSO and SCIM. The free plan is generous for consumer apps, but paid plans are priced by monthly active users and the jump to enterprise features like advanced MFA or many SSO connections can be steep. It runs only as a cloud service, with optional private cloud deployments for large customers. Teams usually pick it when they want a mature, well-documented option and are comfortable with usage-based pricing.

Best for: Product teams that want a mature hosted login with SDKs for almost every stack.

Pros and cons

What works

  • SDKs and quickstarts for nearly every language and framework
  • Actions allow custom logic in login and sign-up flows
  • Large free tier for consumer apps

Why people leave

  • Costs rise sharply once you need B2B or enterprise features
  • Cloud only for most customers; no self-hosted edition
  • Dashboard and docs can be confusing alongside Okta's own products

Top Auth0 alternatives

See all 7
  1. 1Cl
    Clerk

    Faster to drop into React and Next.js apps, with prebuilt UI components and a larger free tier.

    66.5
  2. 2WorkOS logo
    WorkOS

    Better fit for B2B SaaS that mainly needs enterprise SSO and SCIM, with a free first million users.

    62.6
  3. 3Keycloak logo
    Keycloak

    Free, self-hosted and standards-based, for teams that would rather run identity themselves.

    59.6
  4. 4FusionAuth logo
    FusionAuth

    Similar feature set with a free self-hosted Community edition and no per-user cloud lock-in.

    57.2
  5. 5Zitadel logo
    Zitadel

    Open-source alternative with cloud or self-hosting and multi-tenancy built in.

    55.3

Why people left Auth0

In reviewers' own words, from reviews of the apps they moved to. These are their opinions, not ours.

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Auth0: common questions

Is Auth0 free?

Auth0 has a free plan and paid plans. Free plan: Up to 25,000 monthly active users (checked on Auth0's own site).

Is Auth0 open source?

No, Auth0 is not open source. Open-source alternatives include Keycloak and Zitadel.

What platforms does Auth0 run on?

Auth0 is available for Web.

What are the best alternatives to Auth0?

The highest-ranked Auth0 alternatives right now are Clerk, WorkOS and Keycloak. See the full ranked list for pricing, platforms and verified facts.

See all 7 Auth0 alternatives