What is the license for Sentinel CLI?

In a past role I was working with Terraform Enterprise and used Sentinel as a policy framework for Terraform.

In a new role where the company is not a Terraform Enterprise customer, I am interested in using Sentinel as a policy framework for our Terraform IaC. I am wondering if I can use Sentinel CLI in various CI/CD pipelines for policy management and evaluation.

Can you point me to the Sentinel CLI license?