Spaceliftvs
Atlantis


Atlantis: Open source, free, and runs Terraform from pull request comments if orchestration depth is not the requirement

Infrastructure-as-code orchestration for Terraform, OpenTofu, Pulumi and Kubernetes
As of 31 August 2026, Spacelift is free to use. A managed control plane for infrastructure pipelines, priced on run concurrency rather than on seats, with one published figure and three tiers that require a sales conversation. Softwr lists it under Developer Tools. Spacelift is made by Spacelift, Inc., available on Web, Self-hosted, Cloud.
Overview
Spacelift runs infrastructure-as-code pipelines as a managed service, covering Terraform, OpenTofu, Pulumi, CloudFormation, Kubernetes through Helm and Kustomize, Ansible and Terragrunt, connected to GitHub, GitLab, Bitbucket, Azure DevOps or a raw Git remote. Its argument is that general purpose continuous integration was built for application builds and handles infrastructure state, drift and approval gates badly. The pricing unit is the thing to understand before evaluating anything else. Users are unlimited on every paid tier, and what is metered is private workers, which cap how many runs execute in parallel. Business includes three, Enterprise five to thirty. Scaling deployment throughput therefore means moving up a tier rather than adding seats, which is the opposite of how most engineering tools are budgeted and produces a very different curve at a large organisation. It is also one of the few commercial vendors that sponsors OpenTofu directly, which matters as a hedge for anyone uncomfortable with Terraform under IBM and the Business Source Licence. The company raised a 51 million dollar Series C led by Five Elms Capital in July 2025, and the pricing shape reflects that: a free tier for two users, then a substantial jump.
The honest half
Concrete and checkable, so you can decide whether any of them matter to you. This is the half of a review a vendor will not write about Spacelift.
Cross-shopped
Each pairing was judged by two reviewers asking whether a buyer would genuinely weigh the two against each other. The ones that failed were deleted rather than published.


Atlantis: Open source, free, and runs Terraform from pull request comments if orchestration depth is not the requirement


Pulumi: Choose when defining infrastructure in a general purpose language matters more than orchestrating existing Terraform


Harness: Broader delivery platform where infrastructure pipelines sit alongside application deployment
Pricing
Taken from the vendor's own pricing page. Prices move, so check before you buy.
Free
Free
Starter Plus
On request
Business
On request
Enterprise
On request
Capabilities
Multi-tool orchestration
Terraform, OpenTofu, Pulumi, CloudFormation, Kubernetes, Ansible and Terragrunt in one control plane
Policy as code
Rego policies gating plan approval, run initiation and access
Private workers
Runners inside your own network so credentials and state never leave it
Spaces
Multi-tenancy for separating teams, environments and blast radius
Blueprints
Templated stacks so a team can provision without writing the pipeline
Drift detection
Scheduled reconciliation against real infrastructure state
Answered, with sources
Each answer names the page it came from, so you can check it rather than take our word for it.
By tier and by private worker count rather than per user. Users are unlimited on every paid plan. The published figure on the pricing page carries no period label, and the FAQ describes the tier as an annual subscription, so confirm the period in writing.
Yes, and Spacelift sponsors the OpenTofu project, which is a substantive hedge for anyone avoiding Terraform under the Business Source Licence.
Yes, described as carrying Enterprise functionality, but it is priced on request and lags the hosted product on cloud integrations.
That is the real comparison. General purpose CI handles state, drift, approval gates and concurrency control for infrastructure poorly, and whether that is worth a five-figure floor depends on how much infrastructure change your organisation actually ships.
They do not port. Rego policies, Blueprints, Spaces and managed state are Spacelift constructs and the orchestration has to be rebuilt elsewhere.
Keep looking
Runs Terraform plan and apply from pull request comments, self-hosted and free
Software delivery platform across CI, CD, security testing and cost management
Internal developer portal that scores service ownership and maturity rather than just cataloguing services
Internal developer portal that scores service ownership and production readiness
Open source internal developer portal framework created and open sourced by Spotify
Runs production-like development environments on your own Kubernetes cluster
Cloud development environments repositioned as a control plane for software engineering agents
Infrastructure as code provisioning and management, formerly Terraform Cloud
Feature flag service priced per flag and environment with unlimited seats and unlimited monthly active users
The Python web framework behind ERPNext, sold as managed hosting through Frappe Cloud
Programmable CI/CD engine that runs your pipeline as containers on any runner
A fast, open-source, fully Node-compatible JS runtime with TypeScript baked right in
The Python web framework behind ERPNext, sold as managed hosting through Frappe Cloud
Softwr does not host reviews and shows no star rating for Spacelift, because a rating we did not collect is not ours to publish. What is here is the pricing and platform detail from the vendor’s own pages, limitations we could state concretely, and alternatives a reviewer confirmed people weigh against it. Tell us if any of it is wrong.
What people switch to, and what they give up
Every tier, and where the cost actually lands
Put it head to head with anything we hold
Its rating, and an embed for your own site
Internal developer portal that scores service ownership and maturity rather than just cataloguing services
quoteFeature flag service priced per flag and environment with unlimited seats and unlimited monthly active users
Per month by feature flag and environment countProgrammable CI/CD engine that runs your pipeline as containers on any runner
Per month per team for Dagger CloudEvent gateway that receives, queues, retries and replays inbound webhooks
Per month by delivered event countAnalytics governance: define a tracking plan, generate typed code from it, and catch drift before release
Per editor seat per monthKubernetes development and testing automation with shared caching, now owned by Incredibuild
Open source, no licence feeThe Python web framework behind ERPNext, sold as managed hosting through Frappe Cloud
Per month by site or serverOpen source internal developer portal framework created and open sourced by Spotify
Open source, no licence fee