What you'll learn: Why engineering teams are searching for an Atlantis alternative, common migration patterns from Atlantis to modern platforms, and how Terrateam OSS delivers the missing features teams need - including parallel execution, RBAC, drift detection, and cost estimation - all while remaining open source.

Atlantis is the open-source Terraform automation tool that most teams start with. It pioneered GitOps workflows for infrastructure and became the default open-source option for teams wanting PR-based Terraform automation. But many teams eventually search for an Atlantis alternative. This post explains why teams outgrow Atlantis and how Terrateam OSS fills the gap with the features modern infrastructure teams actually need. ## What Atlantis does well Let's be clear: Atlantis deserves credit for what it brought to the infrastructure community. It's open source, GitOps-friendly, and widely adopted. For small teams just starting with Terraform automation, it works. Atlantis introduced thousands of teams to the power of PR-based infrastructure workflows. Its simplicity and open-source nature made it the go-to choice for teams wanting to escape manual terraform applies. But it hasn't kept pace with how teams actually use Terraform today.

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## Where Atlantis falls short As teams grow and their infrastructure becomes more complex, Atlantis's limitations become painful constraints. Here are the main issues teams encounter: ### Single-threaded execution = scaling bottlenecks Atlantis processes one plan or apply at a time across your entire organization. When you have multiple teams working on infrastructure, this becomes a massive bottleneck. Engineers wait in queue while critical changes sit idle.

Real impact: We've seen teams with 50+ engineers where critical production fixes wait 20+ minutes behind routine development changes. One team calculated they lost 15 engineering hours per week to Atlantis queueing.

### No RBAC or real security controls Atlantis has [no fine-grained access control](https://github.com/runatlantis/atlantis/issues/308). Anyone who can open a PR can run terraform commands on any workspace. For teams with compliance requirements or multiple environments, this is a non-starter. ### Drift detection marked "won't fix" Infrastructure drift is inevitable, but Atlantis explicitly [won't add drift detection](https://github.com/runatlantis/atlantis/issues/263). Teams resort to cron jobs and custom scripts to detect when their actual infrastructure diverges from code.

Note: The Atlantis maintainers have valid reasons for this decision - it's outside their project scope. But that doesn't help teams who need drift detection today.

### High operational overhead & config sprawl Running Atlantis means managing servers, dealing with workspace locks, configuring webhooks, and maintaining `atlantis.yaml` files scattered across repositories. The operational burden grows faster than the value it provides. ### PR comment clutter slows code review Atlantis posts so many comments you'd think it was trying to win a prize. Every plan, every apply, every lock, every unlock - it all gets dumped into PR comments. Actual code review discussions get buried under automation noise. ### Barebones UI, no dashboards or SSO Atlantis offers no visibility into what's running, what's queued, or what failed. No dashboard to see infrastructure state. No SSO integration. You're flying blind unless you build your own observability layer.

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## Migration Patterns: Why teams look for an Atlantis alternative We've observed a clear pattern in how teams evolve their infrastructure automation: - **Small teams (under 20 engineers):** Atlantis works fine. The limitations are annoying but manageable. - **Growing teams (20-100 engineers):** They hit scaling and security pain. Multiple teams compete for the single execution thread. Compliance requirements expose the lack of access controls. - **Large teams (100+ engineers):** Often pushed toward expensive TACOS platforms with opaque "enterprise" pricing that can exceed $500k/year. The problem isn't team size - it's that Terraform automation has become unnecessarily expensive. Teams of all sizes deserve powerful features without enterprise pricing games.

The truth about TACOS: Terraform automation is a commodity - everyone does the same thing (run plan and apply safely). Yet some vendors charge $500k+/year for it. Terrateam provides enterprise features with transparent, fair pricing for teams of any size.

Ready to upgrade from Atlantis? See how Terrateam eliminates bottlenecks and adds enterprise features while staying open source. Explore our GitHub repository to get started.

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## The Atlantis alternatives landscape Several tools position themselves as Atlantis alternatives: Spacelift, env0, Scalr, and Terraform Cloud offer similar features but with opaque "enterprise" pricing that can reach $30k/month. IBM-owned Terraform Cloud alone charges some customers upwards of $500k/year for what is fundamentally a commodity service. Most alternatives force you to choose: either limited open-source tools or expensive enterprise platforms with hidden pricing. Terraform automation shouldn't require a budget discussion.

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## Why Terrateam OSS is a modern Atlantis alternative Terrateam OSS delivers everything Atlantis does, plus the features you've been missing: ### 1 Open-source core, like Atlantis Trust and transparency matter. Terrateam OSS is open source, so you can inspect the code, contribute features, and avoid vendor lock-in. ### 2 GitOps workflows Manage everything via pull requests, just like your application code. Developers and SREs shouldn't have to leave their PRs to make infrastructure changes. Terrateam brings the same workflow you use for code changes to Terraform. ### 3 Safe concurrency Run multiple plans and applies in parallel without corruption or conflicts. Terrateam's architecture handles concurrent changes intelligently. ### 4 Secrets handling Native integration with your CI/CD secrets and OIDC for cloud providers. No more storing keys on servers or dealing with manual credential rotation. ### 5 Drift detection included Scheduled drift detection runs automatically to detect when your infrastructure diverges from code. Get notified in Slack or create PRs to reconcile drift. ### 6 Cleaner UI & fewer noisy comments Terrateam integrates with your version control's native UI elements and consolidates automation output. Your PRs stay readable and focused on code review instead of drowning in bot spam.

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## Atlantis vs Terrateam OSS: Feature Comparison | Feature | Atlantis | Terrateam OSS | |---------|----------|---------------| | **Open Source** | ✅ | ✅ | | **Parallel Execution** | ❌ | ✅ | | **Fine-grained RBAC** | ❌ | ✅ | | **Drift Detection** | ❌ | ✅ | | **Cost Estimation** | ❌ | ✅ | | **Self-hosted or Cloud** | Self-hosted only | ✅ Both | | **OIDC Support** | ❌ | ✅ | | **Policy as Code** | ❌ | ✅ | | **Consolidated PR View** | ❌ | ✅ | | **Reporting UI** | ❌ | ✅ | | **SSO Support** | ❌ | ✅ |

Key takeaway: Terrateam OSS provides the most comprehensive feature set while remaining open source. It's the natural evolution for teams that have outgrown Atlantis.

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## See Terrateam in action Terrateam provides visibility where you need it. Clean, consolidated views in your pull requests for developers who live in their PRs, plus a full reporting UI for managers and teams who need to track infrastructure changes across the organization.

Best of both worlds: While Atlantis only gives you walls of text in PR comments, Terrateam provides consolidated PR views for developers AND a reporting UI for broader visibility across all your infrastructure operations.

Terrateam dashboard showing parallel execution timeline with multiple Terraform runs

The dashboard shows: - **Parallel execution timeline** - See multiple plans and applies running simultaneously - **Real-time status updates** - Know instantly when runs complete or fail - **Execution history** - Track all changes across repositories and teams - **Resource details** - Drill down into specific infrastructure changes - **Cost impact** - See estimated costs before applying changes

Developer experience: Engineers can quickly check the reporting UI instead of scrolling through hundreds of PR comments. Managers get visibility into infrastructure changes without needing direct access to your version control system.

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## Migrating from Atlantis to Terrateam The best migrations are reversible. Terrateam makes it easy to try without commitment:

Migration promise: Migrate in 30 minutes, revert in 5 if needed. No vendor lock-in, no irreversible changes, no risk to your infrastructure.

### 1 Install Terrateam alongside Atlantis Run both tools in parallel. Terrateam can operate in shadow mode, running plans without applying changes. ### 2 Compare outputs Verify that Terrateam produces the same plans as Atlantis. Test your workflows, access controls, and integrations. ### 3 Gradual migration Move one repository or workspace at a time. Start with non-critical infrastructure to build confidence. ### 4 Switch when ready Once you're comfortable, disable Atlantis and rely fully on Terrateam. The entire migration takes about 30 minutes for most teams.

The safety net: If anything goes wrong, you can revert to Atlantis in under 5 minutes. Just disable Terrateam and re-enable Atlantis. Your infrastructure remains untouched throughout the migration.

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## Conclusion If you're searching for an Atlantis alternative, you're not alone. Thousands of teams have hit the same scaling, security, and operational challenges. Terrateam OSS is Atlantis, but with everything you've been missing. Modern architecture, comprehensive features, and a painless migration path make it the natural evolution for teams that have outgrown Atlantis.

Bottom line: Terrateam OSS gives you enterprise-grade features with transparent pricing that makes sense. No $500k/year contracts, no "call us for pricing" - just powerful automation at a fair price for teams of any size.

Ready to modernize your Terraform automation? [Get started with Terrateam](https://app.terrateam.io) or explore the [open-source repository](https://github.com/terrateamio/terrateam) to get started.

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## Frequently Asked Questions ### What is the best Atlantis alternative? Terrateam OSS is widely considered the best Atlantis alternative for teams that need modern features while staying open source. It provides parallel execution, RBAC, drift detection, and cost estimation - all the features Atlantis lacks - while maintaining the simplicity and transparency of open-source software. ### Why should I migrate from Atlantis to Terrateam? Teams migrate from Atlantis to Terrateam for several reasons: - **Performance**: Parallel execution eliminates queueing bottlenecks - **Security**: Built-in RBAC and access controls - **Visibility**: Modern dashboard instead of PR comment spam - **Features**: Drift detection, cost estimation, and policy enforcement included - **Simplicity**: No servers to manage, runs in GitHub Actions ### How long does it take to migrate from Atlantis? Most teams complete the migration in about 30 minutes. You can run both tools in parallel during the transition, and if anything goes wrong, you can revert to Atlantis in under 5 minutes. ### Is Terrateam OSS really open source? Yes, Terrateam OSS is open source. You can inspect the code, contribute features, and self-host if needed. There's also a cloud version with additional enterprise features for teams that prefer managed solutions. ### What makes Terrateam different from other Atlantis alternatives? Unlike traditional TACOS platforms (with their $30k/month pricing), Terrateam OSS provides comprehensive features in our open-source core. We believe Terraform automation is a commodity worth paying for, but at a fair price - not as a major budget line item. ### Can I use Terrateam with GitLab or Bitbucket? Yes! Terrateam supports GitHub, GitLab, and Bitbucket.

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## Related Resources **Learn More:** - [GitOps Best Practices](/gitops) - Master infrastructure automation workflows - [Technical Architecture](/technical-architecture) - Deep dive into Terrateam's design - [Infrastructure Governance](/use-cases/infrastructure-governance) - Implement compliance and controls - [Drift Detection Guide](/use-cases/drift-detection) - Keep infrastructure in sync **Get Started:** - [Documentation](https://terrateam.io/docs) - Complete setup and configuration guides - [GitHub Repository](https://github.com/terrateamio/terrateam) - Explore the source code - [Community Slack](/slack) - Join discussions with other teams

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Atlantis Alternative: Why teams are moving to Terrateam OSS