Advanced Customizations for Universal Login are currently available in Early Access. To learn more about Auth0 releases, review Product Release Stages.

- Create pixel-perfect branding: Design user interfaces that look and feel a part of your brand.
- Support multiple brands or customers in one tenant: Leverage application, user, and organization information to deliver multi-brand authentication experiences.
- Gather advanced analytics & metrics: Integrate A/B testing and analytics platforms to optimize and innovate on onboarding journeys.
- Comply with regional requirements: Follow region-specific requirements around localization, privacy, and accessibility.
- Leverage existing technology investments: Utilize the technologies that already power your applications, design-systems, CSS, and Javascript frameworks.
- Build custom authentication experiences secured by Auth0: Connect the security and extensibility of the Auth0 features like passkeys, threat intelligence, and Security Center with your organization’s aesthetics and user experience.
- Balance the effort & impact of front-end development: Iteratively or selectively adopt ACUL based on your company’s specific business needs and use cases.
What is supported in Early Access?
During the Early Access phase, Auth0 will release and support custom interfaces for every screen and capability included by default in Universal Login. Early Access is supported for use in Production, and future EA releases will be non-breaking, meaning they will be backward compatible with existing supported screens and features. Below is a list of the currently supported screens and capabilities; this information can also be found in the Auth0 Changelog.December 9 2024 ACUL Changelog
December 9 2024 ACUL Changelog
This EA release focuses on the configuration API, dev tooling, basic SDK support, and building custom UIs for the first factor screens and capabilities related to the Identifier First authentication profile, including:
- Management API endpoints for configuring Advanced Customizations for Universal Login on a per screen basis
- Support for the new Management API endpoints in Terraform Provider, Deploy CLI, and Auth0 CLI
- A Typescript SDK for building interfaces and interacting with the server
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Support building custom UIs for the ID First first-factor screens
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Supported authentication methods
- Password
- Passwordless Email/SMS OTP
- Passkeys
- Enterprise/Social Connections
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Supported client-side capabilities
- Flexible Identifiers
- Bot Detection (Captcha)
- Capturing additional data during login & signup
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Supported screens:
login-id
login-password
signup-id
signup-password
login-passwordless-email-code
login-passwordless-sms-otp
passkey-enrollment
passkey-enrollment-local
email-identifier-challenge
phone-identifier-challenge
phone-identifier-enrollment
interstitial-captcha
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Supported authentication methods
February 6 2025 ACUL Changelog
February 6 2025 ACUL Changelog
This release enables ACUL, by default, for all tenants on a paid plan and focuses on building custom UIs for the single step signup/login flows and the basic reset password flow, including:
signup
login
reset-password
reset-password-email
reset-password-request
reset-password-error
reset-password-success
Feb 24 2025 ACUL Changelog
Feb 24 2025 ACUL Changelog
This release adds support for user-built custom versions of Universal Login’s multi-factor authentication enrollment screens and three of our most common MFA factors using the new ACUL SDK, including:
mfa-detect-browser-capabilities
mfa-begin-enroll-options
mfa-enroll-result
mfa-login-options
mfa-email-list
mfa-email-challenge
mfa-country-codes
mfa-sms-enrollment
mfa-sms-list
mfa-sms-challenge
mfa-push-welcome
mfa-push-enrollment-qr
mfa-push-list
mfa-push-challenge-push
March 31 2025 ACUL Changelog
March 31 2025 ACUL Changelog
This release adds support for custom versions of Universal Login’s Organizations screens, multi-factor authentication (MFA) time-based one-time password screens, and each MFA factor’s matching Reset Password Challenge factors using the new ACUL SDK, including:
- Accept Invitation
- Organization Selection
- Organization Picker
- MFA OTP Enrollment QR
- MFA OTP Enrollment Code
- MFA OTP Challenge
- Reset Password MFA OTP Challenge
- Reset Password MFA Email Challenge
- Reset Password MFA Push Challenge Push
- Reset Password MFA SMS Challenge
- Typescript SDK (includes a breaking change; the changelog in GitHub has migration steps)
- Auth0 CLI
- Deploy CLI
- Terraform Provider Auth0
April 28 2025 ACUL Changelog
April 28 2025 ACUL Changelog
Date: April 28, 2025
This release adds support for building custom versions of Universal Login’s Device Authorization screens, MFA voice, phone, and recovery code screens, and matching Reset Password Challenge factors, all of which use the new ACUL SDK. The following screens are new:- Device Code Activation
- Device Code Activation Allowed
- Device Code Activation Denied
- Device Code Confirmation
- MFA Phone Challenge
- MFA Phone Enrollment
- MFA Voice Challenge
- MFA Voice Enrollment
- Reset Password MFA Phone Challenge
- Reset Password MFA Voice Challenge
- MFA Recovery Code Challenge
- MFA Recovery Code Enrollment
- Reset Password MFA Recovery Code Challenge
- Redeem Ticket
DX Updates
The latest versions of the ACUL SDK and our CDT tooling all include support for these new screens.May 27 2025 ACUL Changelog
May 27 2025 ACUL Changelog
Date: May 27, 2025
This release adds support for building custom versions of Universal Login’s WebAuthn + Biometrics authentication and the matching MFA and Reset Password Challenge screens, as well as Logout and a few others, all of which use the new ACUL SDK. The following screens are new:- MFA WebAuthn Change Key Nickname
- MFA WebAuthn Enrollment Success
- MFA WebAuthn Error
- MFA WebAuthn Platform Challenge
- MFA WebAuthn Platform Enrollment
- MFA WebAuthn Roaming Challenge
- MFA WebAuthn Roaming Enrollment
- Reset Password MFA WebAuthn Platform Challenge
- Reset Password MFA WebAuthn Roaming Challenge
- Logout
- Logout Aborted
- Logout Complete
- MFA Recovery Code Challenge New Code
- Email Verification Result
- Login Email Verification