Open-Source DevOps · runatlantis

atlantis

Atlantis is a self-hosted Go application that automates Terraform workflows by listening for pull request events and running plan, import, and apply operations remotely. It comments results back to pull requests, making infrastructure changes visible and collaborative across teams.

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Source: GitHub — github.com/runatlantis/atlantis

9.2k

GitHub stars

1.3k

Forks

Primary language

Apache-2.0

License (OSI-approved)

Key facts

Objective fields from the source. Values we can't verify are shown as “Unknown” rather than guessed.

Field	Value
Repository	runatlantis/atlantis
Owner	runatlantis
Primary language	Go
License	Apache-2.0 — OSI-approved
Stars	9.2k
Forks	1.3k
Open issues	822
Latest release	v0.46.0 (2026-06-30)
Last updated	2026-07-04
Source	https://github.com/runatlantis/atlantis

What atlantis is

A Go-based webhook receiver that integrates with Git hosting platforms to orchestrate Terraform operations via pull request events. It executes terraform plan/apply/import commands remotely and surfaces output as PR comments, enabling centralized IaC governance.

Quickstart

Get the atlantis source

Clone the repository and explore it locally.

terminalbash

1git clone https://github.com/runatlantis/atlantis.git2cd atlantis3# follow the project's README for install & configuration

Need it deployed, integrated, or customized instead? DEV.co ships production installs.

Best use cases

Multi-team Infrastructure Governance

Organizations where non-operations engineers need to propose and review Terraform changes safely, with all modifications visible in pull requests and audit trails maintained.

Standardized Terraform Workflows

Engineering teams seeking to enforce consistent terraform plan/apply patterns, policy checks, and approval workflows across multiple repositories and AWS/GCP/Azure deployments.

Self-Hosted Infrastructure as Code CI/CD

Teams preferring on-premises or private deployment of IaC automation without reliance on third-party SaaS platforms, maintaining full control over credentials and state management.

Implementation considerations

Plan for secure secret storage and rotation of cloud provider credentials that Atlantis will assume; mishandled secrets compromise infrastructure.
Establish Terraform state backend configuration (S3, GCS, Terraform Cloud) and locking strategy before deploying Atlantis to avoid concurrent apply conflicts.
Configure webhook authentication (GitHub App, token validation) to prevent unauthorized PR-based Terraform execution.
Design role-based access control within your VCS so only authorized developers can trigger atlantis apply commands.
Test disaster recovery for the Atlantis instance itself—database backups, SSL certificates, and configuration—since it becomes a critical pipeline component.

When to avoid it — and what to weigh

Terraform State Management Not Yet Solved — Atlantis assumes mature Terraform state practices (backend configuration, locking, security). Teams with ad-hoc or unsecured state will face credential and race condition risks.
Limited Git Webhook Support Required — Atlantis relies on webhook integration with GitHub, GitLab, Gitea, or Bitbucket. If your VCS lacks webhook capability or is air-gapped, implementation becomes complex.
Heavy Declarative Policy Enforcement Needed — While Atlantis supports custom workflows, it is not a policy-as-code engine. Teams requiring fine-grained OPA, Sentinel, or similar enforcement may find it insufficient alone.
Minimal DevOps Capacity — Self-hosting, webhook configuration, Terraform provider secrets management, and operational observability demand dedicated ops attention; managed SaaS alternatives may be simpler.

License & commercial use

Apache License 2.0 (Apache-2.0): a permissive OSI-approved license allowing commercial use, modification, and distribution with attribution and disclaimer of liability. No unusual restrictions.

Apache-2.0 explicitly permits commercial use and derivative works. No proprietary terms, paid tiers, or license restrictions detected in provided data. Verify compatibility with any internal policy requiring vendor support SLAs, as Atlantis is community-driven open source without commercial backing mentioned.

DEV.co evaluation signals

Editorial assessment — not user reviews. Directional, with an explicit confidence level.

Signal	Assessment
Maintenance	Active
Documentation	Strong
License clarity	Clear
Deployment complexity	Moderate
DEV.co fit	Strong
Assessment confidence	High

Security considerations

Atlantis handles cloud provider credentials and executes arbitrary Terraform code triggered by pull requests. Key risks: leaked secrets in logs/comments, SSRF via malicious Terraform, unauthorized apply execution, and state corruption. Mitigations include webhook authentication, PR approval requirements, credential masking, and restricted Atlantis IAM roles. Review webhook validation, secret handling, and audit logging in your deployment. No penetration test or CVE history provided; assess via OpenSSF Scorecard badge link.

Alternatives to consider

Terraform Cloud / Terraform Enterprise

HashiCorp's managed SaaS or on-prem solution with native policy enforcement (Sentinel), no self-hosting required, and tighter Terraform integration; trade-off: vendor lock-in and cost.

Spacelift

SaaS-first IaC orchestration platform with policy, cost estimation, and drift detection; simpler ops but hosted externally and subscription-based.

env0

GitOps-driven IaC platform with RBAC, policy, and cost governance; alternative if you prefer managed service and richer compliance features over self-hosted simplicity.

Software development agency

Build on atlantis with DEV.co software developers

Evaluate Atlantis for your team's infrastructure-as-code governance needs. Review the deployment guide, test webhook integration, and plan your state backend strategy.

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atlantis FAQ

Can Atlantis run terraform apply automatically, or does it require approval?

Atlantis can comment with plan output on every PR and execute apply only when explicitly triggered (e.g., via comment command). Policy enforcement (mandatory approval before apply) is configurable; refer to docs/server-configuration for approval rules.

Does Atlantis store Terraform state, or does it rely on an external backend?

Atlantis itself does not store state; it orchestrates terraform commands that read/write to your configured backend (Terraform Cloud, S3, GCS, etc.). You must configure and secure your state backend separately.

Is Atlantis suitable for small teams or only large enterprises?

Suitable for teams of any size that value visibility and collaboration on IaC changes. Small teams may find managed alternatives (Terraform Cloud) simpler if self-hosting overhead is unacceptable.

What happens if Atlantis goes down—can Terraform still be applied?

Atlantis is a UI/orchestration layer; teams can still apply Terraform manually via CLI if Atlantis is unavailable. However, standardization and audit trails are lost. Plan for HA/backup accordingly if it becomes critical infrastructure.

Software development & web development with DEV.co

Need help beyond evaluating atlantis? DEV.co is a software development agency offering software development services and web development for teams of every size. Our software developers and web developers build custom software, web applications, APIs, and open-source devops integrations — and maintain them long-term.

Ready to Automate Terraform Workflows?

Evaluate Atlantis for your team's infrastructure-as-code governance needs. Review the deployment guide, test webhook integration, and plan your state backend strategy.

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