To purchase a subscription for a CrossClave account, navigate to crossclave.com. There you will be greeted by several purchase options with varying levels of service options and service. Choose the tier of service you wish to purchase and select 'Purchase Now'.
Once the page opens you will need to adjust the number of users you are purchasing subscriptions for as well as purchase additional storage space if you desire. Once you have added your usercount and extra space to the account, choose the 'Add to cart' button.
You will now be directed to a review page. Double check your numbers, update your cart if you change anything, and select 'Proceed to Checkout'.
At the checkout page you will need to create an account if you are not already logged in. Login, or create your account and then enter your credit card information if paying by card, or the appropriate ACH payment information if purchasing via that method and choose 'Purchase License'. Your order will complete and you will now be able to download the desired version of CrossClave for use.