Terraform vs Pulumi: Infrastructure as Code Comparison 2026

Terraform vs Pulumi: Infrastructure as Code Comparison 2026 Terraform has been the IaC default for years. Pulumi challenges it by letting you write infrastructure in Python, TypeScript, Go, and other real programming languages. In 2026, both are production-grade — the choice comes down to your team's preferences and requirements. The Fundamental Difference Terraform uses HCL (HashiCorp Configuration Language) — a declarative DSL designed specifically for infrastructure. Pulumi uses general-purpose programming languages. Write infrastructure in TypeScript, Python, Go, Java, or C# — with full language features: loops, conditions, functions, classes. # Terraform (HCL) resource "aws_s3_bucket" "logs" { bucket = "my-app-logs-${var.environment}" tags = { Environment = var . environment ManagedBy = "terraform" } } // Pulumi (TypeScript) import * as aws from " @pulumi/aws " ; const logsBucket = new aws . s3 . Bucket ( " logs " , { bucket : `my-app-logs- ${ environment } ` , tags : { Environmen