--- title: "atmos vs aiac" type: "comparison" canonical_url: "https://www.graphcanon.com/compare/cloudposse-atmos-vs-gofireflyio-aiac" tools: ["cloudposse-atmos", "gofireflyio-aiac"] --- # atmos vs aiac *GraphCanon updated Sep 20, 2026* ## Verdict Pick atmos if atmos is a Terraform orchestration tool for DevOps written in Go. It supports hierarchical imports and inheritance to keep environment configuration DRY; pick aiac if aiac, an IaC generator for AI infrastructure, is built in Go and supports Terraform and Pulumi. [atmos](https://atmos.tools) reports 1.4k GitHub stars, 177 forks, and 286 open issues, last pushed Sep 19, 2026. [aiac](https://github.com/gofireflyio/aiac) has 3.8k stars, 296 forks, and 3 open issues, last pushed Mar 24, 2026. Figures are from public GitHub metadata via [atmos's repository](https://github.com/cloudposse/atmos) and [aiac's repository](https://github.com/gofireflyio/aiac). | | [atmos](/tools/cloudposse-atmos.md) | [aiac](/tools/gofireflyio-aiac.md) | | --- | --- | --- | | Tagline | Terraform Orchestration Tool for DevOps using Go | Artificial Intelligence Infrastructure-as-Code Generator | | Stars | 1,379 | 3,788 | | Forks | 177 | 296 | | Open issues | 286 | 3 | | Language | Go | Go | | Adopt for | Atmos is a Terraform orchestration tool for DevOps written in Go. It supports hierarchical imports and inheritance to keep environment configuration DRY. | aiac, an IaC generator for AI infrastructure, is built in Go and supports Terraform and Pulumi. | | Persona | - | - | | Runtime | - | - | | License | Apache-2.0 | aiac uses the Apache-2.0 license, allowing for permissive free usage and modification with attribution required. | | Categories | Developer Tools | Developer Tools, LLM Frameworks | ## Trust and health _Sourced signals - not a safety guarantee. No winner column._ | | [atmos](/tools/cloudposse-atmos.md) | [aiac](/tools/gofireflyio-aiac.md) | | --- | --- | --- | | Maintenance | Very active (96%) | Slowing (36%) | | Days since push | 0d | 179d | | Open issues (now) | 286 | 3 | | Stars delta | +27 (30d) | +3 (30d) | | Open issues delta | -18 (30d) | +1 (30d) | | Full report | [trust report](/tools/cloudposse-atmos/trust.md) | [trust report](/tools/gofireflyio-aiac/trust.md) | ## Decision facts: atmos - **Adopt for:** Atmos is a Terraform orchestration tool for DevOps written in Go. It supports hierarchical imports and inheritance to keep environment configuration DRY. ## Decision facts: aiac - **Hosting:** self hosted - Deployment methods include installation through Homebrew taps, Docker containers, Go install package management, and direct compilation from source. - **Pricing:** freemium - aiac is free for use under the Apache-2.0 license with no subscription fees; however, any third-party services like Amazon Bedrock or OpenAI might incur additional costs. - **Requirements:** Min 1 GB RAM; Requires Docker; Requires Go for local builds and installations through Homebrew taps.; Supports Docker, making it easy to deploy across multiple environments without needing full Go setup. - **Adopt for:** aiac, an IaC generator for AI infrastructure, is built in Go and supports Terraform and Pulumi. - **License detail:** aiac uses the Apache-2.0 license, allowing for permissive free usage and modification with attribution required. ## Choose when ### Choose atmos if… - Tags unique to atmos: automation, cli, cloud, devops. - When you need a tool that supports both Terraform and Helmfile natively, allowing for streamlined management of infrastructure as code with rich inheritance capabilities. - More recently updated (last pushed Sep 19, 2026). ### Choose aiac if… - Deployment methods include installation through Homebrew taps, Docker containers, Go install package management, and direct compilation from source. - Pricing: aiac is free for use under the Apache-2.0 license with no subscription fees; however, any third-party services like Amazon Bedrock or OpenAI might incur additional costs.. - Requirements: Min 1 GB RAM; Requires Docker; Requires Go for local builds and installations through Homebrew taps.; Supports Docker, making it easy to deploy across multiple environments without needing full Go setup.. - Tags unique to aiac: ai, amazon-bedrock, chatgpt, iac. - Also covers LLM Frameworks. - - Use aiac when you are working on AI projects that require IaC tools like Terraform or Pulumi, and want to manage your infrastructure as code using the Go language. ## When NOT to use atmos - Avoid using Atmos if you are looking for a solution that supports a wider range of infrastructure definition languages beyond Terraform and Helmfile. - Not suitable for those who require extensive UI features, as it primarily focuses on CLI operations and automated DRY configurations. ## When NOT to use aiac - - Avoid aiac if your project is not based on Go or does not require the integration of Terraform and Pulumi for managing infrastructure. - - Do not use aiac in scenarios where you are working strictly within an environment that prefers languages other than Go, such as Python, or requires proprietary licenses. ## Common questions ### What is the difference between atmos and aiac? atmos: Terraform Orchestration Tool for DevOps using Go. aiac: Artificial Intelligence Infrastructure-as-Code Generator. See the comparison table for live GitHub stats and shared categories. ### When should I choose atmos over aiac? Choose atmos over aiac when Tags unique to atmos: automation, cli, cloud, devops; When you need a tool that supports both Terraform and Helmfile natively, allowing for streamlined management of infrastructure as code with rich inheritance capabilities; More recently updated (last pushed Sep 19, 2026). ### When should I choose aiac over atmos? Choose aiac over atmos when Deployment methods include installation through Homebrew taps, Docker containers, Go install package management, and direct compilation from source; Pricing: aiac is free for use under the Apache-2.0 license with no subscription fees; however, any third-party services like Amazon Bedrock or OpenAI might incur additional costs.; Requirements: Min 1 GB RAM; Requires Docker; Requires Go for local builds and installations through Homebrew taps.; Supports Docker, making it easy to deploy across multiple environments without needing full Go setup.; Tags unique to aiac: ai, amazon-bedrock, chatgpt, iac; Also covers LLM Frameworks; - Use aiac when you are working on AI projects that require IaC tools like Terraform or Pulumi, and want to manage your infrastructure as code using the Go language. ### When should I avoid atmos? Avoid using Atmos if you are looking for a solution that supports a wider range of infrastructure definition languages beyond Terraform and Helmfile. Not suitable for those who require extensive UI features, as it primarily focuses on CLI operations and automated DRY configurations. ### When should I avoid aiac? - Avoid aiac if your project is not based on Go or does not require the integration of Terraform and Pulumi for managing infrastructure. - Do not use aiac in scenarios where you are working strictly within an environment that prefers languages other than Go, such as Python, or requires proprietary licenses. ### Is atmos or aiac more popular on GitHub? aiac has more GitHub stars (3,788 vs 1,379). Stars measure visibility, not whether either tool fits your constraints. ### Are atmos and aiac open source? Yes - both are open-source projects on GitHub (atmos: Apache-2.0, aiac: Apache-2.0). ### Where can I find alternatives to atmos or aiac? GraphCanon lists graph-backed alternatives at [atmos alternatives](/tools/cloudposse-atmos/alternatives) and [aiac alternatives](/tools/gofireflyio-aiac/alternatives) ([atmos markdown twin](/tools/cloudposse-atmos/alternatives.md), [aiac markdown twin](/tools/gofireflyio-aiac/alternatives.md)), ranked by typed relationship edges rather than popularity votes. ### Is there a machine-readable version of this comparison? Yes. The markdown twin at [this comparison](/compare/cloudposse-atmos-vs-gofireflyio-aiac.md) mirrors this page for agents and LLM crawlers, with the same stats table and FAQ answers. ### Which is better maintained, atmos or aiac? atmos: Very active. aiac: Slowing. Compare maintenance labels, days since push, and release cadence in the trust section below - stars alone do not measure maintenance. ### Where are the full trust reports for atmos and aiac? GraphCanon publishes per-repo trust reports with dated maintenance, provenance, and scan summaries: [atmos trust report](/tools/cloudposse-atmos/trust); [aiac trust report](/tools/gofireflyio-aiac/trust). --- **Machine-readable endpoints** - JSON: [`/api/graphcanon/graph?tool=cloudposse-atmos`](/api/graphcanon/graph?tool=cloudposse-atmos) - LLM index: [/llms.txt](/llms.txt) - Full corpus: [/llms-full.txt](/llms-full.txt) _GraphCanon - The knowledge graph for AI development. https://www.graphcanon.com/_