> ## Documentation Index
> Fetch the complete documentation index at: https://docs-staging-quickstart-revamp.mintlify.site/llms.txt
> Use this file to discover all available pages before exploring further.

> Describes the various authentication methods supported by Auth0 passwordless connections, including email, magic link, and SMS.

# Passwordless Authentication Methods

With <Tooltip tip="Passwordless: Form of authentication that does not rely on a password as the first factor." cta="View Glossary" href="/docs/glossary?term=Passwordless">Passwordless</Tooltip> connections, users can log in without a password. Instead, they can use a variety of other authentication methods. Auth0 Passwordless connections support the following authentication methods:

<table class="table">
  <thead>
    <tr>
      <th>Factor</th>
      <th>Description</th>
    </tr>
  </thead>

  <tbody>
    <tr>
      <td><a href="/docs/authenticate/passwordless/authentication-methods/email-otp">Email</a></td>
      <td>The user is asked to enter their email address, to which Auth0 sends a one-time-use code. The user enters the code into your application.</td>
    </tr>

    <tr>
      <td><a href="/docs/authenticate/passwordless/authentication-methods/email-magic-link">Magic Link</a></td>
      <td>The user is asked to enter their email address, to which Auth0 sends an email with a link in it. The user clicks the link and is directly logged in to your application.</td>
    </tr>

    <tr>
      <td><a href="/docs/authenticate/passwordless/authentication-methods/sms-otp">SMS</a></td>
      <td>The user is asked to enter their phone number, to which Auth0 sends a one-time-use code. By default, Auth0 uses Twilio to send the code, but if you have a custom SMS gateway, you can modify your connection to use that instead.</td>
    </tr>
  </tbody>
</table>