The licensing for SPTRansformator are similar to that of SPCAF. However, with SPTransformator there are two options:
Allows you to use SPTransformator for one SharePoint farm to assess your customizations and remove them if unused or modernize them during migration. The subscription is per farm and number of WFE Servers and grants unlimited users, unlimited Farm Inventory Scans and Unlimited WSP transformations. The subscription is for 1 year with support and updates.
Allows you to use SPTransformator with multiple client SharePoint farms, estimate and speed up your customization migration projects and train yourself in the modern SharePoint development models. The subscription is per consultant (multi-user licenses are available) and unlimited Farm Inventory Scans and unlimited WSP Transformations. The subscription is for a year with support and updates.