Terraform Alternatives (2026): 10 IaC Engines and Platforms

Terraform alternatives come in two shapes, and mixing them up wastes a migration. One kind replaces the engine and the language you write in. The other keeps your Terraform-style code and replaces the orchestration around it: runs, approvals, drift checks and policy.

The ten tools below are listed alphabetically, and every description comes from each vendor's own website, read as of Oct 2026. For the wider category, including configuration tools, see my guide to infrastructure as code tools.

Terraform alternatives at a glance

I checked the free plan column on each vendor's own website, as of Oct 2026. Yes means the page names a free plan, a free version or an open source edition. Trial only means it names a time-limited free trial. Not stated means the page I read named neither, so check the vendor's own site before you sign up.

Tool	Type	Good for	Free plan
Atlantis	Pull request automation	Running plans and applies from pull requests	Yes
Brainboard	Visual cloud design and IaC	Designing cloud infrastructure visually, then as code	Not stated
env zero	Cloud control plane for IaC	Drift detection, remediation and policy enforcement	Not stated
Firefly	Cloud resilience and IaC automation	Codifying cloud, managing drift and recovery	Not stated
Harness Infrastructure as Code Management	IaC management in a delivery platform	Infrastructure runs inside the same delivery pipeline	Not stated
OpenTofu	Open source IaC engine	A community-driven drop-in replacement engine	Yes
Pulumi	IaC in general-purpose languages	Infrastructure in Node.js, Python, Go, .NET, Java or YAML	Yes
Scalr	Terraform Cloud alternative	Moving off Terraform Cloud without rewriting code	Not stated
Spacelift	IaC orchestration platform	Governed multi-IaC workflows and day-2 operations	Trial only
Terragrunt	Open source IaC orchestrator	Organising and speeding up large IaC codebases	Yes

Ten engines, orchestrators and add-ons for Terraform users

Atlantis

Best for: Small teams that want plans and applies run from pull requests, with approvals before applies and audit logs, on GitHub, GitLab, Bitbucket or Azure DevOps.

Brainboard

Best for: Organisations moving to infrastructure as code that want a smart cloud designer mixing diagrams with code, plus one central source of truth for their modules.

env zero

Best for: Governance and security teams that want drift detection and continuous policy enforcement, with fixes made at the IaC source so the same misconfiguration stops coming back.

Firefly

Best for: Ops leaders who want IaC automation, drift management and cloud governance tied to disaster recovery, so the cloud they codify can also be brought back fast.

Harness Infrastructure as Code Management

Best for: Engineering groups already shipping software through one delivery platform who want infrastructure runs, policies and remediation pull requests inside the same pipeline.

OpenTofu

Best for: Teams that want to keep their existing workflows and configurations on a community-driven, open source engine under the Linux Foundation's stewardship.

Pulumi

Best for: Developers who'd rather write infrastructure in a language they already know, for any cloud, with an AI infrastructure agent and open source skills for coding agents.

Scalr

Best for: Anyone on Terraform Cloud wanting a drop-in replacement they can point existing code at, ideally starting the move a few months before renewal, as the vendor suggests.

Spacelift

Best for: Platform teams that want governed workflows across several IaC tools, with day-2 automation on top, so developers ship fast and the platform team stays in control.

Terragrunt

Best for: Teams with lots of modules who want them organised and faster, with hooks that run tasks before and after updates and a free CI/CD pipeline option.

Leaving the language or only the platform?

This question decides your shortlist, and the vendor pages make it plain. Several tools sold as Terraform alternatives still run Terraform-style code underneath:

• OpenTofu calls itself a drop-in replacement for Terraform under the Linux Foundation's stewardship, and its page says it began in response to HashiCorp's switch from an open source licence to the BUSL.
• Scalr's page title is 'Drop-in Terraform Cloud Alternative'. It replaces the hosted platform, not your code.
• Pulumi's home page announces native support for Terraform and HCL, so even the language-first option will read code you've already written.
• Harness says its IaC product orchestrates and governs several engines, Terraform included.

So if your pain is the licence or the engine, look at the language and engine options. If your pain is slow runs, approvals, drift or governance, keep your code and change the orchestration.

Three layers people mix up

• The engine and language. What reads your code and talks to cloud APIs. Two tools here sit at this layer: an open source fork and a tool that uses general-purpose languages.
• The orchestration platform. Where runs happen, who approves an apply, how drift is caught and how policy is enforced. Most of this list lives here.
• The wrapper and pull request layer. Open source tools that organise modules or run plans from pull requests, often on your own CI runners.

Five checks for an IaC shortlist

1. Which engines does it support? Several orchestrators say they handle more than one IaC tool, which keeps your options open.
2. Where do runs execute? Some tools run in your own CI runners, others in the vendor's cloud.
3. How does it handle drift? Detection is common; fixing it at the IaC source is rarer.
4. What does approval look like? Pull request comments, a web UI or policy as code.
5. How hard is the move? Ask for a migration plan, and start well before any renewal date.

Once your infrastructure lives in code, you'll still want eyes on what it runs. My guide to Datadog alternatives covers monitoring.

Do you make an infrastructure as code tool? Tool makers can ask to be considered for a featured place on this list.

My plain advice for teams leaving Terraform

Don't rewrite anything until you know which layer is hurting. If it's the licence, an open source fork lets you keep your configurations as they are. If it's the hosted platform, a drop-in orchestrator is a far smaller change than a new language. Only move to a general-purpose language if your team wants to write infrastructure the way it writes application code, and try it on one new project first.

If the bigger question is where your workloads run at all, my guide to VMware alternatives covers the hypervisor side.

Want your tool on this list? Featured spots and reviews here are paid partnerships. Here's how to partner with me.

Frequently asked questions

Is there a free Terraform alternative?

Yes. Several tools on this list are open source, including an engine fork, a pull request automation tool and an orchestrator for large codebases. The free plan column shows which, from each vendor's own page as of Oct 2026.

Can I keep my HCL code if I switch?

In most cases, yes. A fork that calls itself a drop-in replacement keeps your workflows and configurations, and most orchestration platforms run Terraform-style code unchanged.

What's the difference between a Terraform alternative and a Terraform Cloud alternative?

A Terraform alternative replaces the engine or the language. A Terraform Cloud alternative replaces the hosted platform that runs plans and applies, stores state and enforces policy. One tool on this list markets itself as exactly that.

Does a small team need an orchestration platform?

Not always. A small team can run plans from pull requests with an open source tool on its own CI. Platforms earn their place once you need approvals, drift detection and policy across many workspaces.

Is drift detection worth having?

If more than one person can change your cloud outside code, yes. Drift detection compares what's deployed with what's in code, and some tools here go further and fix the drift at the IaC source.