Before diving into the specifics of the login process, it is important to understand that ALLDATA offers several distinct platforms. Your login credentials may work across these platforms, but the access points differ:

Unlocking ALLDATA: A Guide to Login, Passwords, and Troubleshooting

If your Alldata plan supports it, enable 2FA immediately. This requires a second form of verification (like a code sent to your phone) in addition to your password. Even if someone steals your password, they cannot log in without your phone.