You can upgrade a Free account that you are a member of at any moment. Note that after the upgrade the payer becomes one of the account's billing admins which means that they will be able to purchase additional seats in the future.
To upgrade the account:
You can also start upgrading in the Account Settings > Team Profile:
The Upgrade plan option in the Account Settings
2) You will see a pop-up menu with the upgrade options. Choose a preferred plan and specify the team size. Please note that the minimum team size for the upgrade will be the current size of the team.
3) Double-check the team size and choose billing type. Enter the credit card information below and click Purchase.
Billing information section
4) Immediately after the purchase, your account will be upgraded and you will receive a payment receipt to your current email address. You will also be able to download the full invoice at any time after the purchase.
How to purchase the Enterprise Plan
If you already have an account, click the Upgrade button on the Dashboard, Choose your plan popup window will appear. Click Request a quote for the Enterprise Plan:
Request a quote for the Enterprise Plan
Fill out the short Enterprise inquiry form and our Sales Representative will reach out to you shortly to discuss all the details.
You can also send a request for the Enterprise plan from the Pricing Page in the same way.