Pulumi looks good, but it confuses me. I thought it was like Ansible/Terraform, but I see a "pricing" page and it looks like there's a SaaS that goes with it, c

Pulumi looks good, but it confuses me. I thought it was like Ansible/Terraform, but I see a "pricing" page and it looks like there's a SaaS that goes with it, can someone shed some light?