Best Infrastructure Testing Tools in 2026
Updated
In short: AWS CloudFormation is ranked #1 of 27 as of 4 October 2026, ahead of Conftest and cfn-lint. The best-ranked option with a free plan is Conftest. The lowest first paid tier on this page is CIS-CAT Pro Assessor at $200/mo.
Infrastructure testing tools help you examine infrastructure code, configurations, and running environments. Compare cloud support and IaC support with deployed checks, provisioning tests, and the execution model to see what each option covers and where checks can run. Config compliance and policy as code offer further ways to compare how rules are assessed. Free plan and Paid from provide access and pricing context. AWS CloudFormation, Conftest, and cfn-lint are among the named options, alongside tools such as Chef InSpec and KICS. Consider which checks fit the infrastructure and workflows you need to assess.
27 infrastructure testing tools ranked on what their makers publish — plans and prices, free tiers, platforms and the facts on their own pages.
16 of the 25 here have a free tier you can use, 0 have open-source code on record, and 0 have full bars: free, open, on most of your devices and documented.
| # | App | Signal | Free tier | Open code | Devices | From | Score |
|---|---|---|---|---|---|---|---|
| 1 | AWS CloudFormationWeb · Windows · Mac · Linux · API | Three bars | — | 4 of 6 | Free | 6.6 | |
| 2 | ConftestWindows · Mac · Linux | Three bars | — | 3 of 6 | Free | 6.6 | |
| 3 | cfn-lintWindows · Mac · Linux · Self-hosted | Three bars | — | 3 of 6 | Free | 6.5 | |
| 4 | Chef InSpecWindows · Mac · Linux · Self-hosted · API | Three bars | — | 3 of 6 | Free | 6.5 | |
| 5 | Cinc AuditorWindows · Mac · Linux | Three bars | — | 3 of 6 | Free | 6.5 | |
| 6 | KICSWindows · Mac · Linux · Self-hosted | Three bars | — | 3 of 6 | Free | 6.5 | |
| 7 | kubeconformWindows · Mac · Linux · Self-hosted | Three bars | — | 3 of 6 | Free | 6.5 | |
| 8 | OpenSCAPWindows · Mac · Linux · Self-hosted | Three bars | — | 3 of 6 | Free | 6.5 | |
| 9 | Test KitchenWindows · Mac · Linux | Three bars | — | 3 of 6 | Free | 6.5 | |
| 10 | TFLintWindows · Mac · Linux · Self-hosted | Three bars | — | 3 of 6 | Free | 6.5 | |
| 11 | cfn-nagMac · Linux · Self-hosted | Two bars | — | 2 of 6 | Free | 6.4 | |
| 12 | CheckovMac · Linux | Two bars | — | 2 of 6 | Free | 6.4 | |
| 13 | KubeLinterMac · Linux · Self-hosted | Two bars | — | 2 of 6 | Free | 6.4 | |
| 14 | terraform-plugin-testingMac · Linux | Two bars | — | 2 of 6 | Free | 6.4 | |
| 15 | TerratestLinux | Two bars | — | 1 of 6 | Free | 6.4 | |
| 16 | terraform-complianceLinux · Self-hosted | Two bars | — | 1 of 6 | Free | 6.3 | |
| 17 | SonobuoyWindows · Mac · Linux · Self-hosted | Two bars | — | — | 3 of 6 | — | 5.6 |
| 18 | kube-scoreWeb · Windows · Mac · Linux · Self-hosted | Two bars | — | — | 4 of 6 | — | 5.5 |
| 19 | Cloud-RadarNo platforms listed | One bar | — | — | 0 of 6 | — | 5.3 |
| 20 | ServerspecWindows · Linux | No signal | — | — | 2 of 6 | — | 5.3 |
| 21 | CIS-CAT Pro AssessorWindows · Mac · Linux · Self-hosted · API | Two bars | — | — | 3 of 6 | $200/mo | 5.2 |
| 22 | MoleculeLinux | No signal | — | — | 1 of 6 | — | 5.2 |
| 23 | CloudSploitWeb | No signal | — | — | 1 of 6 | — | 5.1 |
| 24 | Kubetest2No platforms listed | No signal | — | — | 0 of 6 | — | 5.1 |
| 25 | pytest-ansibleNo platforms listed | No signal | — | — | 0 of 6 | — | 5.1 |
Is your app on this list?
Numbered spots on this list can be sponsored. They are labelled, and the editorial order and scores never change for payment.
Questions about this list
Which infrastructure testing tool is ranked first on Freedom251?
AWS CloudFormation is ranked #1 of 27 with a score of 6.6. Conftest is second and cfn-lint third.
How many of these have a free plan?
16 of the 25 on this page publish a free plan on their own pricing pages.
Which is the cheapest paid option?
On this page, CIS-CAT Pro Assessor has the lowest first paid tier we found: $200/mo.
How is this list ranked?
Ranked free-and-open first: a usable free tier and open-source code, then the platforms it runs on and its documentation. Paid placements never change a rank.