Customizable authentication for developers
Build an authentication experience that meets the needs of their business and resonates with users.
Seamless user onboarding
Guide users effortlessly across your suite of apps and brands. Customize an intuitive login journey tailored to your audience.
Explore Universal Login
Single sign-on
One login to rule all your apps. Simplify access to your apps and improve security with an SSO solution that’s easy to implement.
Check out SSO
Go beyond passwords
If you don't like passwords, what makes you think your users do? Passwordless authentication using passkeys, OTPs and magic links are available out of the box for hassle-free sign-ins.
Explore Passwordless
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 securely.
Identity providers docs
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 docsElevate your authentication game
Transform mundane logins into memorable user experiences.
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. By using the Auth0 Universal Login, some developers can implement secure authentication in minutes, helping ensure that user identity is verified against industry-standard protocols like OpenID Connect and SAML 2.0.
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. This helps ensure high-value resources are protected without requiring MFA for every low-risk login, balancing security with user convenience.
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 secure session and a consistent branded experience throughout. Additionally, Auth0 also supports Native to Web SSO, allowing a seamless user experience transitioning authenticated users from your native app to your web app.
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—such as verifying a user's age, checking a legacy database, or calling a fraud detection API—during the login process, allowing for a fully tailored security and user experience. Complementary to Actions, Auth0 Forms enables developers to use a visual editor to build customizable forms for use cases such as progressive profiling, step-up authentication, and identity verification.
Does Auth0 support biometric authentication?
Yes, Auth0 supports biometric authentication through WebAuthn and Passkeys. This allows users to log into applications using FaceID, TouchID, or Windows Hello. Biometrics provide a phishing-resistant, passwordless experience that is significantly more secure than traditional credentials and offers a frictionless journey for modern mobile and web users.