Best 5 Infrastructure as Code Tools in 2026: Find Your Best Fit

Introduction

Terraform is the strongest overall choice among infrastructure as code tools for teams that need broad provider support and a consistent way to provision resources. This roundup compares five options by the environments they support, how teams define infrastructure, and the jobs each tool handles best.

Quick comparison

Terraform and Pulumi work across multiple providers, while CloudFormation and CDK focus on AWS. AWS SAM is designed for serverless work and is based on CloudFormation. These pricing labels describe access to the tools, not the cost of running infrastructure. Your bill depends on the services and resources you use. *AWS charges may apply for provisioned resources.

1. Terraform

Best for: Teams managing infrastructure across multiple cloud providers or on-premises environments.

Terraform uses configuration files to define resources and provides a consistent workflow for provisioning them across providers. Its wide provider selection is a major advantage for teams working in different environments. Before settling on Terraform, check that its providers support the specific services you depend on. It offers CLI and web access points, with infrastructure management at its core.

2. Pulumi

Best for: Teams that want to define infrastructure with familiar programming languages or YAML.

Pulumi provisions resources across cloud providers and Kubernetes. You can define infrastructure with familiar programming languages or YAML, which sets it apart from a configuration-file workflow like Terraform’s. This approach may suit teams that want to use skills they already have, but it also means building a workflow around those languages or YAML. Pulumi offers CLI and web access points.

3. AWS CloudFormation

Best for: Organizations managing infrastructure entirely on AWS.

AWS CloudFormation is an AWS-native service for provisioning and managing AWS resources. It’s a practical fit for teams that want to manage their infrastructure with a service built for AWS. Its scope is the main limitation: organizations working across cloud providers may prefer a multi-provider tool. CloudFormation is designed for AWS resource management, not as a general cross-provider workflow.

4. AWS Cloud Development Kit (AWS CDK)

Best for: AWS teams that want to define cloud resources using programming languages.

AWS CDK is a toolkit for defining AWS cloud resources with programming languages. Teams can describe infrastructure in languages they already use, which is its main distinction. CDK is focused on AWS, so it’s a better fit for AWS environments than for teams looking for one workflow across providers. CloudFormation provides an AWS-native service model; CDK centers on defining resources through code.

5. AWS Serverless Application Model (AWS SAM)

Best for: Teams building and deploying serverless applications on AWS.

AWS SAM supports serverless application development and deployment, and is based on CloudFormation. It provides a workflow for testing and deploying serverless projects on AWS. That focus makes it a good fit for applications built around serverless services, but not a general-purpose replacement for tools that manage a wider range of environments. Teams managing broader AWS infrastructure may prefer CloudFormation or CDK.

How we picked these tools

This shortlist covers multi-provider infrastructure, AWS-native provisioning, programming-language definitions, and serverless workflows. We compared the tools based on where they’re intended to work and how teams define infrastructure, rather than treating them as interchangeable.

Each has a clear use case: broad provider support, AWS integration, code-based definitions, or serverless development. Pricing labels aren’t a ranking, since actual costs depend on the infrastructure and services a team runs. The right workflow depends on the team.

Frequently asked questions

What do infrastructure as code tools do?

They let teams define and manage infrastructure through files or code instead of configuring each resource by hand. Those definitions can make provisioning and changes more repeatable.

Should I choose a multi-provider tool or an AWS-only service?

Choose a multi-provider tool if you need a consistent workflow across cloud providers or on-premises environments. An AWS-only service may be a better fit if your infrastructure is entirely on AWS and you want an AWS-focused approach.

How do CloudFormation, CDK, and SAM differ?

CloudFormation is AWS’s native infrastructure as code service. CDK is a toolkit for defining AWS resources with programming languages. SAM is based on CloudFormation and focuses on building, testing, and deploying serverless applications.

Should my team use configuration files, code, or YAML?

Start with the format that fits your team’s skills and existing workflow. Configuration files suit teams looking for a consistent declarative approach. Programming languages may work better for teams that want code-based definitions, and YAML is another option in tools that support it.

The verdict

Terraform is the strongest overall choice for teams that need broad provider support and a consistent provisioning workflow. Pulumi is a strong alternative for teams that prefer familiar programming languages or YAML. For AWS-only infrastructure, consider CloudFormation or CDK. For serverless application work on AWS, consider SAM. Check provider coverage and choose a definition style your team can maintain.