GuardDuty and Security Hub show up in almost every AWS security architecture, but they solve fundamentally different problems. GuardDuty watches what’s happening right now — threat detection. Security Hub checks whether your environment is configured correctly — posture management. They overlap in one specific area (findings), which is where the confusion starts.
This post breaks down what each service actually does, where they complement each other, and how to set them up together without redundant noise or wasted spend.
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