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Terraform
Infrastructure as code — 3,200+ providers, plan-before-apply safety, used by 85% of Fortune 500 companies.
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About Terraform
Terraform is the most widely used infrastructure-as-code tool — define AWS, GCP, Azure, and 3,200+ other resources in HCL, and Terraform creates, updates, and destroys them safely.
**The plan-before-apply workflow:**
```bash
terraform plan # Shows every change before it happens
terraform apply # Creates exactly the planned changes
```
The `terraform plan` output explicitly shows: 3 resources to add, 1 to modify (VPC CIDR: 10.0.0.0/16 → 10.1.0.0/16), 0 to destroy. No CloudFormation or Pulumi shows this level of explicit change preview before execution.
**Provider ecosystem:**
3,200+ providers in the Terraform Registry — AWS (1,200+ resources), GCP (800+), Azure (1,000+), Kubernetes, GitHub, Cloudflare, Datadog, PagerDuty, and Snowflake. Define your entire cloud infrastructure in one language — not just VMs, but DNS, CI secrets, and database users.
**License change (August 2023):**
HashiCorp changed from MPL 2.0 to BSL (Business Source License). BSL restricts competitive use but does NOT affect companies using Terraform to manage their own infrastructure. **OpenTofu** (Linux Foundation, MPL 2.0 fork) is available for teams with strict license requirements.
**Adoption:** 85% of Fortune 500 use Terraform. Every DevOps engineer knows it — the safest hiring and tooling choice for infrastructure automation.
Key Features
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HCL: declarative language — define desired state, Terraform determines the sequence of API calls to reach it
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Terraform Plan: explicit preview of every add, change, and destruction before any API call is made
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3,200+ providers: AWS, GCP, Azure, Kubernetes, GitHub, Cloudflare, Datadog — full ecosystem in one registry
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Remote state: S3 + DynamoDB locking — safe concurrent access for teams and CI/CD pipelines
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Modules: reusable versioned infrastructure components — create and share on the Terraform Registry
Pros
- ✓3,200+ providers — define every AWS, GCP, Azure, GitHub, Cloudflare, Snowflake resource in one language
- ✓Plan-before-apply: see exactly what changes before any resource is modified or destroyed
- ✓State file tracks deployed infrastructure — detect drift when someone makes a manual console change
- ✓85% Fortune 500 adoption — every DevOps engineer knows Terraform, largest hiring pool
- ✓Modules: reusable infrastructure components — use community VPC module instead of writing 200 lines of HCL
Cons
- ✗BSL license change in 2023 — consider OpenTofu (MPL 2.0 fork) if license compliance is a hard requirement
- ✗HCL has limitations for complex conditional logic — Pulumi (real programming language) is more expressive
- ✗State corruption risk if multiple team members run apply concurrently without remote state locking
Who is using Terraform?
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DevOps and platform engineers managing cloud infrastructure across AWS, GCP, and Azure
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Teams who need a plan step to review infrastructure changes before applying — safety first
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Organizations with multi-cloud infrastructure who want one declarative tool for all three clouds
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Developers automating creation of development environments with one terraform apply command
Use Cases
- →Defining an entire AWS environment (VPC, ECS cluster, RDS, ALB) in HCL and creating it with one apply
- →Using terraform plan in CI to validate pull requests that change infrastructure before merging
- →Detecting infrastructure drift when a developer manually changed a security group in the AWS console
- →Creating a reusable Terraform module for a standard microservice deployment that the team shares
Pricing
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Open Source (CLI) : $0/mo — Full Terraform CLI, All 3,200+ providers, BSL license, Community support
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HCP Terraform Free : $0/mo — 500 managed resources, Remote state, VCS integration, Community support
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HCP Terraform Plus : $20/user/mo — Unlimited resources, Audit logs, SSO, Priority support
Pricing details may not be up to date. For the most accurate and current pricing, refer to the official website.
What Makes Terraform Unique?
The infrastructure-as-code tool with 3,200+ cloud providers and a plan-before-apply step that shows every change before it happens — used by 85% of Fortune 500 as the standard for declarative cloud infrastructure management.
How We Rated It
Provider count from Terraform Registry. Fortune 500 adoption from HashiCorp State of Cloud Strategy 2024. License analysis from BSL FAQ and OpenTofu documentation. Plan workflow tested with equivalent AWS resources.
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Accuracy and Reliability 4.7/5
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Ease of Use 4.3/5
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Functionality and Features 4.8/5
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Performance and Speed 4.7/5
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Customer Support 4.4/5
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Value for Money 4.8/5
AI summary
Infrastructure as code — 3,200+ providers, plan-before-apply safety, used by 85% of Fortune 500 companies.