Conftest vs TaskCat
Conftest
conftest.dev
TaskCat
aws-ia.github.ioSide by side
| Figure | Conftest | TaskCat |
|---|---|---|
| Price from | Free | — |
| Free plan | Yes | — |
| Free trial | — | — |
| Open source | — | — |
| Windows | Yes | — |
| macOS | Yes | — |
| Linux | Yes | Yes |
| API | — | Yes |
| Plans published | 1 | 0 |
| Spec score · Infrastructure Testing Tools | 8.4 (#4) | 6.6 (#26) |
| Purpose | Conftest is a utility for writing tests against structured configuration data. | TaskCat tests AWS CloudFormation templates by deploying them across multiple AWS Regions and reporting pass or fail for each Region. |
| Support | Questions and discussions are directed to the Open Policy Agent Slack channel `#opa-conftest`. | The documentation directs users to its guides, GitHub issues, and community discussions for help. |
Plans
In their own words
Conftest
Conftest is a free utility for testing structured configuration data, designed for use in CI environments. It uses the Open Policy Agent Rego language to express policies, then evaluates deny, violation, and warning rules within namespaces. Configuration can be read from individual files, directories, multiple files, or standard input. Supported inputs include Kubernetes-style YAML, JSON, HCL and HCL2, Dockerfiles, Terraform-related data, JSONnet, TOML, and XML. Results can be output as plaintext, JSON, TAP, table, JUnit, GitHub, Azure DevOps, or SARIF; the GitHub outputter can annotate test results in workflows. The `conftest verify` command runs policy unit tests. Policies can be pulled from HTTPS URLs, Git repositories, and OCI registries, or pushed to compatible OCI registries. Plugins extend the CLI, with downloads available from sources including OCI, Git, HTTP/HTTPS, Mercurial, and cloud storage. Pre-commit hooks support policy workflows, and integrations are documented for CircleCI, GitHub Actions, and Tekton. Conftest is available for Linux, macOS, and Windows.