What are the main differences between Terraform and Pulumi?

Terraform uses a declarative DSL (HCL), while Pulumi employs real programming languages like TypeScript, Python, or Go. These differing approaches result in various user experiences and capabilities for infrastructure management.

What advantages does Terraform offer for companies?

Terraform provides a comprehensive provider ecosystem with over 3,000 providers and enables easy management of cloud resources. Its declarative definition style is beginner-friendly, making Terraform particularly attractive for teams without deep programming experience.

How does testability work in Pulumi?

Pulumi allows the use of standard testing frameworks like Jest or pytest to create unit tests for infrastructure. This capability significantly enhances the testability and maintainability of infrastructure code, which is often viewed as an advantage over Terraform.

In which scenarios is Pulumi particularly suitable?

Pulumi is especially well-suited for projects that require complex logical structures in the infrastructure and where the team is already well-versed in a programming language like TypeScript. It offers more flexibility and adaptability in infrastructure development.

Which tool does devRocks recommend for infrastructure management?

DevRocks typically recommends Terraform due to its extensive ecosystem and strong community. Pulumi is used in specific cases, particularly when complex logical requirements are involved or when the team is already established in a programming language.

Cloud & Infrastructure 7 min. read

Terraform vs. Pulumi: Infrastructure as Code Compared

Terraform dominates the IaC market, but Pulumi is catching up. We compare both tools from real-world experience, and show when each is the better choice.

devRocks Team · 22. March 2026 · Aktualisiert: 23. May 2026 ·

Terraform Pulumi IaC Infrastructure

Terraform vs. Pulumi: Infrastructure as Code Compared

Two Philosophies, One Goal

Terraform uses a declarative DSL (HCL), Pulumi relies on real programming languages (TypeScript, Python, Go). Both manage cloud infrastructure as code, but the approach differs fundamentally.

Terraform: The Industry Standard

HCL: Easy to learn, even for non-programmers. Declarative, you describe the target state, not the path to get there.
Provider Ecosystem: Over 3,000 providers for every conceivable cloud service.
State Management: Terraform state as the single source of truth for your infrastructure.
Drawbacks: Limited programmability, no native loops/conditionals (workarounds with count/for_each), testing is cumbersome.

Pulumi: Code Instead of Config

Real Programming Languages: Write infrastructure in TypeScript, Python, or Go, with IDE support, autocomplete, and type safety.
Testability: Unit tests for infrastructure with standard test frameworks (Jest, pytest).
Abstraction: Create reusable infrastructure components as classes or functions.
Drawbacks: Smaller ecosystem, steeper learning curve for ops teams without programming experience.

Our Recommendation

At devRocks, we primarily rely on Terraform, the ecosystem and community are unbeatable. Pulumi comes into play when complex logic is needed in infrastructure definitions or when the team already works heavily with TypeScript.