Terraform Cloud (TFC) is HashiCorp's managed service for running Terraform at team and enterprise scale. Where the self-managed S3+DynamoDB backend handles state storage and locking but still requires teams to build their own CI/CD integration for plan review and apply orchestration, Terraform Cloud provides all of these capabilities as a managed platform: remote state storage with encryption, DynamoDB-equivalent locking, VCS (GitHub/GitLab/Bitbucket) integration for automated plan runs on pull requests, plan review and approval workflows, environment-specific variable management (with encrypted storage for sensitive values), policy enforcement via Sentinel, audit logging, SSO integration, and team-based RBAC for workspace access. For teams already building CI/CD infrastructure for Terraform, adopting Terraform Cloud can significantly reduce the operational overhead of running Terraform at scale — the infrastructure that a team spends weeks building (pipeline configuration, approval gates, state management, secret injection) comes pre-built in Terraform Cloud.
Understanding Terraform Cloud is important even for teams that do not use it, because it defines the reference architecture that many open-source alternatives (Atlantis, Scalr, env0, Spacelift) are modelled on. The concepts — VCS-driven runs, speculative plans on PRs, workspace-per-environment state isolation, variable sets for shared configurations, and policy as code for guardrails — represent the industry standard for enterprise Terraform operations. Even teams that implement these patterns with GitHub Actions and an S3 backend benefit from understanding the TFC model, because it provides a clear target architecture to implement.