Shieldly vs Trivy: AI IAM Reasoning vs All-in-One Open-Source Scanner

Trivy is a widely used open-source security scanner from Aqua that handles many jobs in one binary: container and filesystem vulnerability scanning, IaC misconfiguration checks (including the rules that came from tfsec), exposed secrets, and license issues. It is fast, free, and a common default in CI. Shieldly is a focused AI-Powered analyzer for AWS IAM, resource policies, and CloudFormation that explains why a specific policy is risky in plain English and hands back the tightened version. Trivy gives you wide coverage; Shieldly gives you depth on AWS authorization.

What Trivy Is Great At

One tool, many scan types, zero license cost. Trivy is excellent for catching known CVEs in images and dependencies and for running a broad set of IaC misconfiguration rules across Terraform, CloudFormation, Kubernetes, and Dockerfiles. If you want a single open-source command in CI that covers vulnerabilities and config in one pass, Trivy is hard to beat.

Where Shieldly Fits

Trivy's IaC checks match defined rules and point at the offending line. Shieldly explains the why behind an AWS authorization risk in plain English and reasons about multi-step privilege-escalation chains inside a single policy — for example iam:CreatePolicyVersion used to set a new default version — then returns the corrected policy for the engineer in the pull request. Nothing to install to try it: paste a policy into the web app, or run the @shieldly/cli, VS Code extension, GitHub Action, or @shieldly/cdk-guard construct.

Side by Side

Use Both

Trivy for breadth, Shieldly for the AWS authorization depth Trivy is not built for.

• Use Trivy in CI for vulnerability scanning and broad IaC misconfiguration checks across formats.
• Use Shieldly when an IAM or CloudFormation finding needs a plain-English explanation, a corrected policy, or escalation-chain reasoning.
• When Trivy flags an IAM misconfiguration, paste the policy into Shieldly for the reason and the fix.

AWS and CloudFormation are trademarks of Amazon.com, Inc. Trivy and tfsec are projects of their respective owners. Shieldly is not affiliated with or endorsed by any of them. Comparisons reflect public information as of 2026 and general product categories.

Amazon Web Services (AWS) is a trademark of Amazon.com, Inc. Shieldly is not affiliated with, endorsed by, or sponsored by Amazon Web Services.