Gearset is licensed per end user of our tool, and can be paid for monthly or yearly.
Gearset Pro costs $150 USD per user, per month. Gearset Enterprise costs $300 USD per user, per month. Gearset's data loader can be added to either subscription at a cost of $50 USD per user, per month.
An end user is a named user who logs into Gearset for comparisons, deployments, or automation jobs. You don't need a license per user of your Salesforce environment, just for your admins, developers or release managers.
Check out our pricing page for more information about the differences between the two editions.