Best Free Infrastructure as Code Tools in 2026

Modern software delivery platform

4.5/5 across SourceForge, G2 and Capterra · 430 ratings, Sep 2026

Harness is a DevOps platform providing continuous delivery, CI/CD, infrastructure as code management, and security testing orchestration with flexible modular pricing.

Automate IT infrastructure with simple YAML playbooks

4.4/5 across G2 and SourceForge · 378 ratings, Sep 2026

Ansible is an open source automation platform by Red Hat for IT automation including configuration management, application deployment, and orchestration using simple YAML playbooks.

Manage cloud infrastructure with declarative code

4.6/5 on G2 · 111 ratings, Aug 2026

Terraform is an infrastructure as code tool by HashiCorp for provisioning, managing, and versioning infrastructure across cloud providers with declarative configuration files.

Define cloud infrastructure using familiar programming languages

4.4/5 on G2 · 136 ratings, Aug 2026

AWS CDK lets you define cloud infrastructure using TypeScript, Python, Java, or C# instead of YAML templates. Write code that compiles to CloudFormation, with type checking and IDE support along the way. Constructs package reusable infrastructure patterns. The abstraction level lets you work at whatever detail makes sense-high-level components or low-level resources. Developers who find CloudFormation templates painful choose CDK because infrastructure is easier to write, test, and maintain when it's actual code.

Infrastructure automation and management

4.3/5 on G2 · 99 ratings, Sep 2026

SaltStack automates infrastructure with event-driven approach. Configuration management with remote execution-infrastructure automation that reacts. The speed is notable. The event-driven approach differs. The community supports it. Operations teams wanting reactive automation consider SaltStack for event-driven infrastructure.

Build cloud infrastructure using Kubernetes

4.3/5 across G2 and SourceForge · 68 ratings, Sep 2026

Crossplane extends Kubernetes to manage cloud infrastructure. Define databases, storage, and other cloud services using the same Kubernetes resources and tools you use for applications. Cloud providers become Kubernetes resources. The same GitOps workflows manage applications and infrastructure. Composition lets you build reusable abstractions. Platform teams wanting unified infrastructure management choose Crossplane to extend Kubernetes into cloud resource provisioning.

Build identical machine images for multiple platforms from a single source template.

4.2/5 across SourceForge and G2 · 69 ratings, Sep 2026

Packer is an open-source tool for creating identical machine images for multiple platforms from a single source configuration. It streamlines the process of building 'golden images' that can be used across various cloud providers and virtualization technologies, ensuring consistency and reliability in deployments. By automating the image creation process, Packer helps reduce configuration drift and simplifies infrastructure management. This tool is ideal for DevOps engineers, system administrators, and developers who need to create and manage consistent machine images across different environments, such as AWS, Docker, and other cloud platforms. It integrates seamlessly into existing CI/CD pipelines, enabling automated image builds and updates. Packer's core value lies in its ability to produce immutable infrastructure, where every server is built from a pre-configured image, leading to faster deployments, easier rollbacks, and improved security posture. It supports a wide range of builders and provisioners, offering flexibility in how images are created and configured.

Infrastructure as code in any language

4.8/5 across G2 and Capterra · 28 ratings, Sep 2026

Pulumi is an infrastructure as code platform that lets you define, deploy, and manage cloud infrastructure using familiar programming languages like TypeScript, Python, Go, and C#.

Build and deploy cloud applications with a single language.

4.6/5 on G2 · 25 ratings, Mar 2026

Winglang is an open-source programming language designed for building and deploying cloud applications. It unifies infrastructure and application code into a single codebase, allowing developers to define their cloud resources (like queues, buckets, and databases) and their application logic (like serverless functions) within the same Wing program. This approach aims to simplify the development and deployment process for serverless and other cloud-native architectures. Winglang compiles to cloud-agnostic infrastructure as code (Terraform, CloudFormation) and application code (JavaScript, Python, Go), enabling deployment to various cloud providers such as AWS, Azure, and Google Cloud. It provides a local simulation environment for testing cloud applications without deploying to a live cloud, which significantly speeds up the development feedback loop. The language is particularly well-suited for developers looking to reduce the cognitive load associated with managing separate infrastructure and application codebases, and for teams adopting serverless and event-driven architectures.

Automate cloud infrastructure management from discovery to recovery using AI and Infrastructure-as-Code.

4.8/5 on G2 · 13 ratings, Mar 2026

Firefly is an AI-powered platform designed to automate and manage cloud infrastructure using Infrastructure-as-Code (IaC). It provides a unified solution for CloudOps, FinOps, SecOps, and disaster recovery, helping platform teams achieve 100% IaC coverage, detect and remediate drift, and ensure compliance and cost efficiency across multi-cloud environments. The platform caters to platform engineers, CXOs, and operations teams by orchestrating IaC, automatically generating IaC from unmanaged resources, and detecting/fixing misconfigurations in real-time. It also helps eliminate cloud waste, enforce cost controls, and codify security policies. Firefly's AI agents provide dynamic, self-governing, and self-healing cloud operations, ensuring rapid recovery from outages and cyberattacks with minimal downtime. Firefly integrates with major cloud providers like AWS, Azure, and Google Cloud, as well as Kubernetes and SaaS applications with Terraform providers. It supports various IaC types including Terraform, Pulumi, and CloudFormation, offering deep integrations for full visibility, automation, and governance throughout the cloud management lifecycle.

Build serverless apps with infrastructure as code

4.8/5 across SourceForge and G2 · 10 ratings, Sep 2026

Architect lets you define serverless infrastructure as code using simple, readable manifests. Declare your functions, events, queues, and tables, then deploy to AWS with one command. The abstraction level hits a sweet spot-enough control to do real work, enough automation to not spend days on CloudFormation. Local development works the same as production. Teams building on AWS Lambda who want something more focused than Serverless Framework find Architect provides a cleaner developer experience.

Security scanner for containers

4.3/5 on PeerSpot · 12 ratings, May 2026

Trivy is an open-source vulnerability scanner for containers, filesystems, and infrastructure as code. Scan container images for OS and library vulnerabilities. Check Kubernetes manifests and Terraform for misconfigurations. Fast and easy to integrate into CI/CD. Comprehensive database updated regularly. The security scanner DevOps teams actually run.

Zero-friction serverless application development and deployment for AWS Lambda and beyond.

4.1/5 on G2 · 8 ratings, Mar 2026

The Serverless Framework is an open-source framework that helps developers build and deploy serverless applications to AWS Lambda and other cloud providers. It simplifies the process of defining functions and events, deploying infrastructure and code with a single command, and extending functionality with a vast plugin ecosystem. The framework aims to reduce the complexity of serverless development, allowing developers to focus on writing code rather than managing infrastructure. It provides tools for troubleshooting, including metrics, alerts, and request querying, to help monitor and debug serverless applications. The platform also facilitates team collaboration by offering a centralized dashboard to manage applications and resources, securely share secrets and AWS accounts, and share test events for AWS Lambda functions. This makes it suitable for individual developers and teams looking to streamline their serverless development workflow. The Serverless Framework is designed for developers who want to leverage the benefits of serverless architectures, such as high productivity and low overhead, without getting bogged down by intricate cloud configurations. It supports the deployment of APIs, scheduled tasks, workflows, and event-driven applications, making it a versatile tool for various serverless use cases.

Terraform pull request automation

3.5/5 on G2 · 11 ratings, Sep 2026

Atlantis is a self-hosted application for Terraform pull request automation. Run terraform plan automatically on pull requests and show results as comments. Apply changes through PR approvals for audit trails. Supports multiple workflows and Terraform workspaces. Lock infrastructure to prevent concurrent modifications. GitOps for Terraform that makes infrastructure changes reviewable and auditable.

Declarative GitOps for continuous Kubernetes deployment

Flux is GitOps for Kubernetes from the CNCF. Your Git repository defines what runs in your clusters, and Flux makes reality match-continuous deployment that's declarative and auditable. The sync is automatic. Multi-tenancy supports complex environments. Helm and Kustomize are natively supported. Kubernetes teams implementing GitOps choose Flux for declarative, Git-driven cluster management.