Terraform Enterprise is offered as a private installation. It is designed to suit the needs of organizations including more features (audit logging, SSO/SAML), more customization (private networking), better performance (job scaling), and higher levels of support. Terraform Cloud is offered as a multi-tenant SaaS platform and is designed to suit the needs of smaller teams and organizations. It is limited to one run at a time, which prevents users from executing multiple runs concurrently.