Blesta license resellers can use a module for automatic provisioning and management of Blesta licenses.
Blesta License Module
Included with Blesta is the Blesta License module. The Blesta License module integrates with the Blesta Reseller API to handle the creation, cancellation, suspension, unsuspension, and re-issue of Blesta Licenses. Please visit Blesta License for information on installing and configuring this module to sell Blesta licenses from your Blesta installation.
License Module for WHMCS
Companies that use WHMCS can offer Blesta licenses with the Blesta License module for WHMCS.