# Scalr > Scalr is a Terraform and OpenTofu management platform: remote runs, state management, OPA policy enforcement, RBAC, drift detection, and a private module registry, with usage-based per-run pricing. It is a drop-in replacement for Terraform Cloud / HCP Terraform, compatible with the Terraform CLI and the TFC API. ## Key pages - [Home](https://scalr.com/): What Scalr does and who uses it - [Pricing](https://scalr.com/pricing): Per-run pricing with a free tier; no charges for users, workspaces, or resources under management - [Demo](https://scalr.com/demo): Book a walkthrough - [About](https://scalr.com/about): Company background ## Documentation - [Product documentation](https://docs.scalr.io/docs/introduction): Setup, workspaces, policies, agents, and API reference - [Pricing FAQ](https://docs.scalr.io/docs/pricing-faq): How run-based billing works, tier gating, and Enterprise features - [API and provider docs](https://docs.scalr.io/docs/provider_overview): Scalr Terraform provider ## Guides (pillar posts) - [How to Migrate Off Terraform Cloud: A Platform Engineer's Decision Guide (2026)](https://scalr.com/learning-center/how-to-replace-terraform-cloud-a-platform-engineers-decision-guide): A practical decision guide for platform engineers migrating off Terraform Cloud in 2026: whether to leave, what to require in a replacement, how Scalr, Spacelift, env0, and Atlantis compare, what migration actually involves, and how the cost math works. - [OpenTofu vs Terraform: The 2026 Comparison for IaC Teams](https://scalr.com/learning-center/opentofu-vs-terraform): OpenTofu vs Terraform: how the two infrastructure as code tools differ on features, governance, and licensing, and a clear guide to which one your team should choose in 2026. - [CI/CD and GitOps for Terraform & OpenTofu](https://scalr.com/learning-center/building-robust-terraform-opentofu-pipelines-the-ultimate-ci-cd-guide): Comprehensive guide to building reliable CI/CD pipelines and implementing GitOps workflows for Terraform and OpenTofu infrastructure automation. - [HCP Terraform Free Tier in 2026: What Survived the EOL](https://scalr.com/learning-center/hcp-terraform-free-tier-is-being-discontinued-what-you-need-to-know): The legacy HCP Terraform Free plan reached end-of-life on March 31, 2026. What replaced it, the 500-managed-resource cap, current pricing, and where to go next. - [Terraform State & Backends: The Complete Guide](https://scalr.com/learning-center/practical-guide-to-terraform-init-backend-config): Learn how to set up and customize Terraform backend configs with terraform init. Step-by-step examples for remote state, workspaces, and CI/CD. - [Selecting a Terraform Cloud Alternative (2026 Guide)](https://scalr.com/learning-center/selecting-a-terraform-cloud-alternative): A working comparison of Terraform Cloud alternatives (Scalr, Spacelift, env0, plus the open-source options Atlantis, Terrakube, Digger, and Terramate) and what migrating to each actually involves. - [Migrating Off Terraform Cloud/Enterprise: A Complete Guide](https://scalr.com/learning-center/self-hosted-terraform-options-for-tfe-spacelift-scalr): Compare Terraform self-hosting routes: TFE, Spacelift, Scalr. See setup demands, feature gaps, costs, and which platform fits your infra needs. - [Terraform Modules Explained](https://scalr.com/learning-center/terraform-modules-explained): A comprehensive guide to understanding, creating, and managing Terraform modules for scalable Infrastructure as Code. - [Terraform & Terragrunt with Atlantis: The Complete Guide](https://scalr.com/learning-center/the-ultimate-guide-to-terraform-atlantis-with-terragrunt): Terraform Atlantis brings infrastructure automation into your PR workflows. This guide covers implementing, securing, and scaling Atlantis in prod. - [Terraform Import: How to Import Existing Resources Into Terraform](https://scalr.com/learning-center/the-ultimate-guide-to-terraform-import): Use the terraform import command and import blocks to bring existing AWS, Azure, and GCP resources into Terraform state, with examples, FAQs, and bulk-import patterns. - [Terraform Provisioners: The Complete Guide](https://scalr.com/learning-center/understanding-terraform-provisioners): Master Terraform provisioners: learn what they do, when to use or avoid them, and best-practice tips for cleaner, more reliable infrastructure code. - [Terraform tfvars: A Practical Guide to .tfvars Files and Variables](https://scalr.com/learning-center/mastering-tfvars-a-concise-guide-for-terraform-and-opentofu): A comprehensive guide to mastering input variables, output values, local values, and tfvars files in Terraform and OpenTofu for 2026. - [Terraform Strings: The Complete Guide](https://scalr.com/learning-center/terraform-strings-part-2-advanced-templating-and-built-in-functions): Master Terraform strings: learn advanced templating, heredocs, and built-in functions for cleaner, reusable HCL code in minutes. - [The Developer's Guide to HCL](https://scalr.com/learning-center/the-developers-guide-to-hcl-part-1-introduction): What is HCL? Learn the basics of HashiCorp Configuration Language, its purpose, design goals, and how it compares to JSON and YAML for Infrastructure as Code. - [Terraform Expressions, Functions & Data Sources: A Comprehensive Guide](https://scalr.com/learning-center/a-practical-guide-to-terraform-functions): Master Terraform’s built-in functions with clear examples, common pitfalls, and pro tips for cleaner, faster IaC workflows. - [Terragrunt: The Complete Guide for Terraform and OpenTofu Users](https://scalr.com/learning-center/beginners-guide-to-terragrunt): Learn Terragrunt basics, modular Terraform, DRY configs, and automation in this beginner-friendly step-by-step guide. - [Terraform Pull Request Automation: A Complete Guide](https://scalr.com/learning-center/guide-to-terraform-pull-request-workflows): Comprehensive guide to implementing pull request-based Terraform workflows, from basic automation to enterprise-scale governance. - [IaC Security: Securing Your Terraform and OpenTofu Infrastructure](https://scalr.com/learning-center/iac-security-for-terraform-and-opentofu): Comprehensive guide to securing Terraform, covering threat modeling, state file security, secret management, static analysis tools, DevSecOps practices, and best practices for 2026. - [Managing Multiple Terraform Environments: A Practical Guide](https://scalr.com/learning-center/managing-multiple-terraform-environments-a-practical-guide): Learn step-by-step strategies, workspace tips, and pipeline tricks to manage dev, staging & prod with Terraform safely and at scale. - [Terraform Drift Detection and Management: A Comprehensive Guide](https://scalr.com/learning-center/terraform-drift-detection-how-to-prevent-and-remediate): Learn how to manage Terraform drift, automated drift detection, safe remediation options, and the tools to keep your infrastructure secure. - [Terraform Troubleshooting, Optimization and Error Resolution](https://scalr.com/learning-center/terraform-optimization-guide): Speed up Terraform runs, shrink state files, and keep infrastructure code clean with the actionable tips in this Terraform Optimization Guide. - [What is a Terraform TACO?](https://scalr.com/learning-center/what-is-a-terraform-taco): Learn how a Terraform TACO helps you scale your Terraform usage - [What is Terraform?](https://scalr.com/learning-center/what-is-terraform): Learn what Terraform is, when to use it, and what the core components are. - [Enforcing Policy as Code in Terraform: A Comprehensive Guide](https://scalr.com/learning-center/enforcing-policy-as-code-in-terraform-a-comprehensive-guide): Master Policy as Code in Terraform: use OPA, Sentinel & Scalr to automate compliance, prevent drift, and enforce cloud governance without slowing dev teams. - [Terraform Providers: Complete Configuration and Management Guide](https://scalr.com/learning-center/terraform-provider-configurations-overview-examples-and-tips): Learn about what Terraform providers are and how to use them with examples. - [What is OpenTofu?](https://scalr.com/learning-center/what-is-opentofu): OpenTofu is the MPL 2.0-licensed, community-driven fork of Terraform. Use it as a drop-in, lock-in-free way to manage infrastructure as code. - [Using Terraform with Ansible: The Complete Integration Guide](https://scalr.com/learning-center/ultimate-guide-to-using-terraform-with-ansible): Comprehensive guide to integrating Terraform and Ansible for end-to-end infrastructure automation, including patterns, workflows, and best practices for 2026 ## More - [Learning center](https://scalr.com/learning-center): All guides and articles on Terraform, OpenTofu, and infrastructure-as-code workflows - [Sitemap](https://scalr.com/sitemap.xml)