Best Cloud Automation Platforms (2026): Top 10 Compared

HCP Terraform is HashiCorp's managed service for running Terraform, now listed on HashiCorp's pricing page as IBM HCP Terraform. Each workspace stores its own state in HCP Terraform, which acts as the remote backend, and runs execute on disposable virtual machines in HashiCorp's infrastructure or on agents a customer hosts inside its own network.

The service connects directly to a version control provider. Pull requests trigger speculative plans so reviewers see the proposed change, and merges trigger runs. A private registry publishes internal modules using Git tags for versions, and policy sets check plans before apply; the free edition includes one policy set of up to five policies. Plans step up from Essentials to Standard and Premium, with Standard and Premium adding unlimited test-integrated module publishing and Waypoint templates for developer self-service. Organisations that cannot use a SaaS service can buy Terraform Enterprise and run it themselves.

Pulumi is an infrastructure-as-code tool whose SDK is open source under the Apache 2.0 licence. Programs are written in TypeScript, Python, Go, .NET, Java or YAML, so infrastructure can use the loops, functions, packages and tests that application developers already use. Pulumi Cloud is the commercial service that stores state, records update history and runs deployments.

Pulumi Cloud bundles several products. Pulumi Deployments runs updates from CI/CD or on a schedule, Pulumi ESC manages secrets and configuration with rotation and dynamic credentials, and resource search discovers what exists across cloud accounts. Policy packs run in advisory mode on Essentials, and Pro adds organisation-managed enforcement, preventative policies, drift detection and remediation, time-to-live stacks and an internal developer platform. Enterprise adds self-hosting, SCIM and conformance packs for CIS, NIST, PCI DSS, ISO 27001 and other frameworks. Neo, Pulumi's AI agent, reviews code and runs scheduled tasks and is billed per token.

Spacelift is an infrastructure orchestration platform. Its core unit is the stack, which connects a source repository to a cloud account and runs plans and applies for Terraform, OpenTofu, Terragrunt, Pulumi, AWS CloudFormation, Kubernetes or Ansible. Teams already on Terraform or OpenTofu can import existing state or keep state elsewhere.

Policies are written in Rego on Open Policy Agent and decide who can log in, who can trigger runs and whether a plan may proceed. Stack dependencies pass outputs from one stack to the next, contexts share configuration across stacks, and Blueprints and templates give developers a governed form for creating new infrastructure. Runs execute on workers, either public workers operated by Spacelift in isolated containers or private workers in the customer's environment. The Business plan adds drift detection, advanced scheduling and targeted replans. Spacelift Flows targets day-two operations, and Spacelift Intelligence adds an AI assistant.

env zero, which also brands itself env0, manages infrastructure as environments. Each environment is one deployed IaC template with its own state, and the platform runs Terraform, OpenTofu, Terragrunt, Pulumi, CloudFormation, Kubernetes, Helm and Ansible. Environments run in the customer's own cloud accounts; env zero orchestrates their lifecycle rather than hosting them.

The product is aimed at self-service with guardrails. Developers deploy from templates or pull request comments, approval policies and role-based access control limit what they can change, and time-to-live settings and schedules destroy temporary environments automatically. Drift management covers detection, cause analysis and remediation in either direction, updating the cloud or the code. Cost features include estimates through Infracost, actual cost visibility, tagging and budget alerts. The Cloud Pilot tier adds Cloud Analyst, an AI agent with dashboards, plus advanced drift analysis, self-hosted source control and a proof-of-value guarantee. EZ Control, an autonomous cloud control plane, is in early access.

Harness Infrastructure as Code Management (IaCM) is the infrastructure module of the Harness software delivery platform. It supports Terraform, OpenTofu, Terragrunt and CDK, with Ansible playbooks and Galaxy roles covered for configuration steps, and Harness states that more IaC tools will follow.

Infrastructure changes start in a pull request, where policy checks and approvals run before merge. Policies are written for Open Policy Agent and enforced centrally across delivery workflows, and a sample pipeline enforces cost budgets and tag compliance. IaCM produces cost estimates before deployment and monitors spend afterwards, detects drift continuously and opens remediation pull requests. Self-service modules and templates let one definition back many environments. Harness also documents AI features: natural-language creation of pipelines and OPA policies, blast-radius analysis of proposed changes, and a Knowledge Graph that links infrastructure to code, pipelines, vulnerabilities and cost.

Terramate combines an open-source command-line tool, licensed under MPL 2.0, with Terramate Cloud, a hosted service for visibility and governance. The CLI splits Terraform, OpenTofu and Terragrunt code into stacks, each with its own state, which shortens CI run times and limits the blast radius of a change. Existing projects can be onboarded with a single command.

Terramate integrates with the CI/CD tooling a team already uses, naming GitHub Actions, rather than requiring its own runners. Terramate Cloud adds pull request plan previews, deployment workflows, drift detection and reconciliation, dashboards, stack analytics, DORA metrics and incident management. The Teams plan adds asset management, policy as code with Open Policy Agent, CIS benchmark checks and the ability to block pull requests and deployments that fail policy. Pulumi, Kubernetes and Ansible support is listed as coming soon. Enterprise adds SAML, role-based access control, audit logs, private source control and a cloud-prem deployment option.

Upbound sells a commercial distribution of Crossplane, the open-source control plane framework hosted by the Cloud Native Computing Foundation and licensed under Apache 2.0. Crossplane extends the Kubernetes control model beyond containers: infrastructure is declared as Kubernetes resources, and the control plane works continuously to keep actual state matching desired state.

The main use is building internal APIs. A platform team defines the resources application teams may request, such as a database or a network, and the control plane provisions them across clouds and systems. Upbound Crossplane, which Upbound calls UXP, adds an enhanced runtime, official packages, Spaces, identity and role-based access control. Enterprise adds unlimited control planes, fleet management and SSO, and Business Critical adds self-hosted Spaces, Console and Hub. Upbound Insights provides a fleet-wide API and console, and the up CLI runs local development control planes. Teams already running open-source Crossplane can upgrade in place.

Firefly starts from the cloud rather than from code. It scans AWS, Azure, Google Cloud, OCI, Nebius and Kubernetes to build a system of record of every asset, including resources created by hand, and generates infrastructure-as-code for resources that are not yet managed. Firefly states support for Terraform, Pulumi, CloudFormation and Crossplane, and for any SaaS application with a Terraform provider.

On top of the inventory, Firefly offers IaC orchestration with GitOps guardrails, drift and policy violation detection with AI remediation, and self-service provisioning from reusable patterns. Its current product and pricing pages position Firefly mainly around cloud resilience: automated infrastructure backups, dependency-aware scoping, immutable snapshots, point-in-time rollback and rebuilding an environment in a clean region or account. The Scale tier adds recovery readiness scoring, automated recovery time testing and audit evidence for DORA, SOC 2 and ISO. Firefly is listed on the AWS, Azure, Google and Datadog marketplaces.

AWS CloudFormation is the infrastructure-as-code service built into AWS. Templates describe a collection of related resources as a stack, and CloudFormation creates, updates and deletes them in order. The AWS Cloud Development Kit, an open-source framework, lets teams define the same infrastructure in programming languages and deploy it through CloudFormation.

Change sets preview how a proposed update will affect running resources before it is executed. Drift detection reports changes made to resources outside CloudFormation, and rollback triggers reverse a stack operation when a named CloudWatch alarm fires. StackSets provision one template across many accounts and regions in a single operation, which suits landing zones and organisation-wide baselines. Git sync updates a stack from a template stored in a remote repository, and the CloudFormation Registry adds third-party resource types and modules. For multi-cloud estates, CloudFormation is usually one tool among several rather than the orchestration layer.

Atlantis is an open-source pull-request automation server for Terraform, maintained as a series of LF Projects under the Apache 2.0 licence and in production use since 2017. It receives webhooks from GitHub, GitLab, Bitbucket or Azure DevOps, runs terraform plan when a pull request changes infrastructure code, and posts the output as a comment so reviewers can catch errors before anything is applied.

Applies can require approval and run before the pull request merges, so the main branch reflects what is deployed. Atlantis locks a project while a pull request is open to stop conflicting plans, records logs of changes, approvals and user actions, and supports custom workflows and Conftest policy checking. The project documents integration with OpenTofu. Because Atlantis is self-hosted, cloud credentials stay in the customer's environment and developers can propose changes without them. It does not provide state hosting, a module registry or self-service portals.