Secure authentication solutions built for the next generation of apps

Move past standard login screens. Build identity experiences that drive conversion across web, mobile, and agentic apps.

Build identity your way: hosted, API-based, or both

Universal Login

Hosted authentication that’s built for more secure handoffs across apps and AI-powered experiences. Deploy custom identity flows fast with streamlined pro-code setup and full design control via Advanced Customizations for Universal Login (ACUL).

Embedded Login

API-based authentication that’s built for in-app identity flows. Use Auth0 APIs, SDKs, and components for complete pro-code control. Embed directly into first-party apps across checkout, AI agents, and inline in-app experiences—without redirects or web views.

Drive higher conversions with secure login experiences

• Passwordless: Free your users from passwords with flexible passwordless login options. Give them a choice and offer multiple password-free options on the same connection with no extra setup—such as social login, passkeys, email, or phone one-time passwords (OTPs).

• Single sign-on: Log in once. Deliver a frictionless experience that users can access across all your apps — no repeated authentication required.

Adaptive MFA

The right balance of secure access and effortless user experiences. Risk-based, context-aware authentication enforces additional verification only when needed, without disrupting trusted users or AI-powered workflows.
Check out Adaptive MFA

Multiple identities, one login

From social media and enterprise to legal digital profiles, users juggle numerous online identities. Empower them to consolidate these personas and engage with your apps in a more secure manner.
Identity providers

Social logins support

Accelerate the registration and authentication process with over 40 social login alternatives available. Easily create your own social login extension to perfectly fit your needs.
Social Identity

Frequently asked questions

What is Auth0 Authentication?

Auth0 Authentication is a flexible, developer-centric service that supports a wide range of login methods, including username/password, social IDs, enterprise SSO, email/sms passwordless, biometrics via WebAuthN and Passkeys.

What is 'Step-up' authentication in Auth0?

Step-up authentication is a security pattern where Auth0 challenges a user for an additional factor (like MFA) only when they attempt a sensitive action, such as changing a password or making a large purchase.

How does Auth0 handle cross-platform login?

Auth0 provides a unified authentication experience across web, mobile, and desktop applications. By using standardized JWTs (JSON Web Tokens), Auth0 verifies that a user's identity is recognized seamlessly as they move between different platforms in your ecosystem, maintaining a more secure session.

Can I customize the Auth0 authentication pipeline?

Yes, the Auth0 authentication pipeline is highly extensible via Auth0 Actions. Developers can write serverless functions to trigger custom logic during the login process.

Does Auth0 support biometric authentication?

Yes, Auth0 supports biometric authentication through WebAuthn and Passkeys.

What is the difference between Universal Login and Embedded Login?

Universal Login and Embedded Login are two key ways to build conversion-friendly identity journeys. Many customers use a hybrid approach, using different solutions for different identity patterns.