We designed Keela's pricing model so that there are absolutely no hidden fees. Once you've reached your usage limit (either by number of Keela users or contacts), you'll be alerted and prompted to upgrade your account if you wish to continue adding additional users/contacts.
Most importantly, you will not lose access to your Keela account and the data within it.
To upgrade your subscription, either follow the prompt that appears at the bottom of the page, or navigate to 'Organization Settings', and select the 'Accounts' tab. Here, you'll be able to select a new subscription plan for your Keela account. You'll also be able to view your current usage.