audytx vs Fairwinds Polaris

audytx analyzes AWS infrastructure code and Terraform pull requests, presenting security and cost findings in GitHub and to coding agents. Its deterministic, non-AI engine models resource relationships such as invocation topology, encryption chains, network exposure, resource lifetimes, and IAM trust graphs. The maker lists 303 AWS Terraform checks and 27 cross-resource reasoning axes. A GitHub App posts pull-request digests, inline review, and SARIF, using read-only contents permission while writing comments, reviews, statuses, and SARIF uploads. An optional GitHub Actions step uploads a resolved Terraform plan over OIDC without shared secrets. A hosted MCP server exposes the engine to Claude Code, Cursor, and Codex; autofix applies line-anchored changes and rescans for up to three passes. AWS, Terraform, and CloudFormation are supported in stated hosted workflows. Free includes 100 scans monthly; Plus costs $20 a month and Pro $100 a month.

Fairwinds Polaris is an open source policy engine for validating and remediating Kubernetes resource configuration. It includes more than 30 built-in policies, and teams can add their own using JSON Schema. Checks cover security practices such as least privilege, privilege escalation, root execution, and host IPC or PID settings, along with resource requests and limits, readiness and liveness probes, and image tags. Polaris can run as a dashboard, an admission controller, or a command-line tool for checking local YAML files in CI/CD. Its validating webhook rejects workloads that trigger danger-level checks; warning-level findings pass and appear in the dashboard or webhook logs. A mutating webhook or command-line run can automatically remediate supported issues, including missing limits and probes and some unsafe security settings. The dashboard can audit local files or connect to a live cluster, and can be installed with kubectl or Helm. The validating webhook requires a valid TLS certificate. Polaris is free and runs on Linux, macOS, Windows, web, and self-hosted environments.