The right Spacelift alternative comes down to where you want your infrastructure runs to happen: on an open-source tool you host, a hosted platform with policy and governance built in, or a helper that keeps big Terraform codebases tidy. Settle that first, then pilot two options on a real, non-critical stack.
Spacelift alternatives at a glance
Ten tools, one line each in the table below, then a closer look at how to choose. Some are full platforms, some are open-source tools you run yourself, and some work alongside Terraform rather than replacing it.
| Tool | Approach | Good for |
|---|---|---|
| Atlantis | Terraform PR automation | Terraform pull request automation |
| Crossplane | Kubernetes control planes | Building an internal platform on Kubernetes |
| Digger | Open-source IaC CI/CD | Terraform CI/CD with drift detection |
| env0 | Cloud control plane | One central view of infrastructure sources |
| Firefly | Cloud resilience platform | Recovery from attacks and outages |
| Harness IaCM | IaC orchestration and governance | Terraform and OpenTofu governance |
| Pulumi Cloud | IaC in any language | Infrastructure written in any language |
| Scalr | Terraform Cloud replacement | A drop-in Terraform Cloud replacement |
| Terragrunt | Terraform wrapper | Keeping large Terraform codebases organised |
| Terrateam | GitOps orchestration | Pull request workflows across mixed IaC tools |
Platform engineers running Terraform at scale
If you're a platform engineer looking after Terraform, OpenTofu or other infrastructure-as-code across several teams, you've probably hit the point where running plans from laptops stopped being safe. You want plans on every pull request, policy checks, a clear audit trail and state that nobody can corrupt by accident. Spacelift is one way to get that, and this page is about the others.
Why infrastructure code needs an orchestration layer
The UK's NCSC makes a point in its guidance for developers that's easy to skim past: developers can now define a whole system's architecture in code and connect it to tooling that automates both testing and deployment. That's the promise of infrastructure-as-code. The catch is that someone has to run that automation reliably, with the right permissions and checks, every time anyone changes a file.
That's the job every tool on this list is trying to do. They differ in where the work runs, how much they lock you in and how much policy and governance they bolt on.
The ten alternatives in no particular order
Listed alphabetically, unranked. Descriptions follow each vendor's own wording, paraphrased.
Atlantis
Best for: Groups who want Terraform pull request automation.
Crossplane
Best for: Platform teams on Kubernetes that want to build their own cloud-style APIs and manage any resource through control planes.
Digger
Best for: Engineers who want self-hostable, open source Terraform CI/CD with drift detection, PR automation and state management.
env0
Best for: Organisations that want a cloud control plane that pulls every infrastructure source into one central data store.
Firefly
Best for: Teams that care most about cloud resilience and recovering from cyberattacks, outages and AI agent errors.
Harness IaCM
Best for: Platform groups that want Terraform, OpenTofu and other IaC workflows orchestrated and governed.
Pulumi Cloud
Best for: Developers who'd rather write infrastructure in a general-purpose language and manage deployments and governance from one service.
Scalr
Best for: Anyone leaving Terraform Cloud that want a drop-in replacement with a different approach to how usage is counted.
Terragrunt
Best for: Engineers fighting repeated Terraform code who want units, stacks and includes to keep large setups tidy.
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Terrateam
Best for: GitOps teams that want plans on every pull request, policy checks before merge and dependency-aware runs across several IaC tools.
Four questions to settle first
- Do you want to run it yourself? Open-source tools give you control and keep everything inside your network, but your team owns upgrades and uptime. A hosted platform takes that work away in exchange for trusting a vendor with cloud credentials.
- Which IaC tools do you use today? Some options here are Terraform-first; others handle OpenTofu, Terragrunt, CDKTF or Pulumi too. If you're mixing tools, check support for each one rather than assuming it.
- How strict does policy need to be? Regulated teams often need policy-as-code checks, approvals and detailed audit logs before anything reaches production. Ask each vendor to show you a blocked change, not just a passing one.
- What about the resources nobody wrote in code? Most clouds have years of hand-made resources. If that's you, tools that discover and codify what's already running will matter more than a fancy pipeline view.
Advice for platform teams
Run a pilot on a real but non-critical stack, not a hello-world example. Include a module with dependencies, a secrets lookup and at least one policy check, because that's where these tools differ. Measure how long a typical change takes from pull request to applied, and how clear the output is when something fails.
Keep state ownership clear during any move. Back up state files, lock down who can change them and move one workspace at a time. I've seen more outages from careless state migrations than from any bad plan.
And don't forget the people who aren't platform engineers. If application developers will open pull requests that touch infrastructure, the tool's feedback needs to be readable by them too, or they'll keep asking your team to explain every plan.
If you're comparing the wider container side of your stack, my list of Kubernetes alternatives sits well next to this one. For the basics of hosting models, there's an explainer on IaaS, PaaS and SaaS, and this guide to cloud management suites covers tools that look after cloud estates once they're built.
Do you make an infrastructure-as-code platform? Tool makers can ask to be considered for a featured place on this list.
Want your tool on this list? Featured spots and reviews here are paid partnerships. Here's how to partner with me.
Frequently asked questions
What does a Spacelift alternative need to do?
At minimum it should run plans and applies in a controlled place, link them to pull requests, protect state, and record who changed what. Most teams also want policy checks, drift detection and support for the IaC tools they already use.
Is an open-source tool enough for Terraform automation?
For many teams, yes. Open-source options can run plans from pull requests and fit into existing CI. The trade-off is that you host, upgrade and secure them yourself.
What is drift detection?
Drift is when real cloud resources no longer match what your code says, often because someone changed something by hand. Drift detection regularly compares the two and flags differences so you can fix or codify them.
Can I switch tools without rewriting my Terraform?
Usually. Many of these tools run your existing Terraform or OpenTofu code. The work is in moving state, credentials, policies and pipelines, so plan that carefully and move one workspace at a time.
Do I need a separate tool if I use Kubernetes?
Not always. Kubernetes-based control planes can manage cloud resources directly. Teams that already run everything through Kubernetes sometimes prefer that model over a separate Terraform pipeline.
