Claude is an intelligent AI assistant developed by Anthropic, designed for conversations, writing, coding, and more. This guide walks you through the entire process of registering a Claude account, linking your email, and switching between multiple accounts so you can start using it quickly.
Two Ways to Register a Claude Account
Go to the Claude website (claude.ai) and click the "Sign up" button. You can either sign in with your Google account for one-click access or register using an email address. We recommend using a Gmail or Outlook email to avoid missing verification emails from certain providers. After entering your email, a verification code will be sent — enter it and set a password to complete registration. Note that some regions may require phone number verification, so make sure your number can receive SMS.
Email Binding and Security Settings
Once registered, it's a good idea to immediately link a backup email and enable two-factor authentication (2FA). Go to your account Settings, find the "Security" section, and add a backup email for password recovery. Enabling 2FA means you'll need a verification code each time you log in, which helps prevent unauthorized access. If you're sharing an account with multiple people, keep in mind that each phone number can only be bound to one Claude account to avoid conflicts.
Tips for Switching Between Multiple Accounts
Claude doesn't currently support logging into multiple accounts simultaneously from the same session. However, you can switch between them using browser profiles or incognito modes. For example, create a new "Guest profile" in Chrome, or use different browsers (Chrome, Edge, Firefox) to log into separate accounts. Another option is to install a session management extension like SessionBox, which lets you save and quickly switch between account states. Avoid changing your IP address too frequently, as this may trigger security measures and lock your account.
Common Registration and Binding Issues
If you don't receive the verification code during registration, check your spam folder or try a different email provider. If you see the message "This account already exists," it means the email is already registered — use the "Forgot password" option to regain access. When phone number verification fails, double-check the number format or try a different carrier. After switching between multiple accounts, if you notice any unusual behavior, clear your browser cache and log in again.
Follow these steps and you'll be able to use Claude smoothly. If you run into any other errors during binding or switching, check out Claude's official Help Center or leave a comment on this site — we'll help you troubleshoot.
