Terraform Enterprise (TFE) is an advanced infrastructure-as-code tool designed for businesses to safely and efficiently manage their infrastructure. It enables collaborative infrastructure management across teams, leveraging Terraform's powerful capabilities within a secure, private environment. Key features include self-hosted deployment, private registry for modules and providers, policies for implementing guardrails, audit logs, drift detection, integrations through Run Tasks, RBAC, and more. However, TFE has limitations such as only managing Terraform code, limited integrations for Run Tasks, no mechanism for passing outputs between configurations without writing terraform code, and potentially prohibitive costs for smaller teams or projects. Some alternatives to TFE include Spacelift, Atlantis, Jenkins, GitHub Actions, Azure DevOps, Env0, Scalr, GitLab CI/CD, Morpheus, and Azure Automation. Among these alternatives, Spacelift is the only one that checks all the boxes for being self-hosted, specializing in IaC management, and offering a premium support level.