To sign up for a CloudResearch account, simply click Sign Up in the upper right corner of the header on the main page. You will be taken a landing page where you can choose to create a new account on CloudResearch or create a CloudResearch account automatically by logging in with your Google, Facebook, Amazon, Twitter, or Microsoft account.
If you want to create a separate account for CloudResearch, click on Create an Account at the bottom. On the next page, enter your email and a password. You should receive an automated verification email. Upon verifying your email, you can log into your CloudResearch account! If you later decide you want to log in with your Google, Facebook, Amazon, Twitter, or Microsoft account credentials you can set this up by going to Profile → Account Details → Manage Logins → External Logins. Once you reach the External Logins page you can choose which external account you would like to link to CloudResearch.