Terraform

Terraform is an open-source infrastructure as code tool created by HashiCorp in 2014, enabling teams to define, provision, and manage cloud infrastructure through declarative configuration files. The HashiCorp Configuration Language provides syntax for declaring infrastructure resources with variables, modules, and dependencies, supporting over three thousand providers covering Amazon Web Services, Microsoft Azure, Google Cloud Platform, and hundreds of SaaS services. Adopted by Uber, Twitch, Reddit, and Deliveroo. The state management tracks mapping between configuration and real infrastructure, enabling drift detection and planning. The execution plan generates a visual diff showing exactly what will change before applying, enabling safe review. The workspaces manage multiple environments. The import feature brings existing infrastructure under management. The Cloud edition adds team management, policy as code through Sentinel, and cost estimation. Designed for DevOps engineers, platform teams, and cloud architects.