Shieldly vs Prowler: AI Explanations and Fixes vs Compliance Breadth

Prowler is an open-source posture and compliance scanner — hundreds of checks across your whole AWS account, mapped to frameworks like CIS, PCI-DSS, and SOC 2. Shieldly is an AI-Powered analyzer that explains why a specific IAM policy, resource policy, or CloudFormation template is risky and gives you the tightened version — free, no signup, and in your pull request. They solve different problems; many teams run both.

What Prowler Is Great At

Breadth and compliance. If an auditor wants proof against a benchmark across a live account, Prowler's hundreds of checks and framework mappings are exactly the tool. It covers a wide surface area — from IAM to networking to logging — and maps findings to CIS Benchmarks, PCI-DSS, SOC 2, and more. It is open source and scriptable, which makes it a natural fit for teams that want to customize checks or run posture reviews on a schedule.

Where Shieldly Fits

The moment you are writing a policy. Prowler tells you a finding exists; Shieldly explains it in plain English and hands you the fix — for the engineer in the PR, before anything ships. No account setup is required to feel the value: paste a policy and see AI-Powered findings in around ten seconds.

Prowler scans what is already deployed. Shieldly reviews what you are about to deploy. That difference in timing is what makes them complementary: Shieldly catches the risk at authoring time, and Prowler catches anything that slipped through once it is live.

Side by Side

Use Both

Prowler and Shieldly are not competing for the same job. Prowler gives you account-wide compliance posture; Shieldly gives you an explanation and a fix at the point the policy is written. Running them together covers both sides of the risk lifecycle.

• Use Prowler for scheduled compliance scans, audit evidence, and broad account posture across all AWS services.
• Use Shieldly in pull requests to explain risky patterns and return a tightened policy before the change is merged.
• Wire Shieldly's GitHub Action to run on every PR that touches IAM or CloudFormation, and let Prowler validate the live account on a nightly schedule.

AWS and AWS IAM Access Analyzer are trademarks of Amazon.com, Inc. Prowler and Cloudsplaining are trademarks 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.