Terrateam focuses on pull-request-native infrastructure automation. Its README describes open-source Terraform automation in pull requests, with plans and applies triggered in the review flow and support for Terraform, OpenTofu, Terragrunt, CDKTF, Pulumi, and arbitrary CLIs. That makes the product especially relevant for teams that want GitHub-based IaC governance without replacing their current repository model.
The differentiators are scale and policy controls: tag-based configuration for monorepos, apply-only locks so multiple plans can run in parallel, OPA/Rego policy enforcement, team or role approval requirements, drift detection, and cost estimates. The official site also emphasizes self-hosting and single-tenant cloud options, so the operational model can be matched to security and procurement needs.
Terrateam is MPL-2.0 licensed and has a pricing page with a free cloud tier for core workflows plus paid governance tiers and self-hosted options. It should be framed as a VCS-native IaC orchestration layer adjacent to Atlantis, Digger, env0, and Spacelift, not as a general-purpose CI system.