AWS Cost Anomaly Detection:

AWS Cost Anomaly Detection monitors cost and usage trends in near real-time to detect unexpected spikes or patterns.

It can send alerts as soon as anomalies are detected, offering the earliest possible detection of cost increases.

Steps to Implement:

Create an anomaly detection monitor for the affected services or linked accounts.

Define a threshold for expected cost variations.

Set up an Amazon SNS topic to receive anomaly alerts.

Advantages:

Real-Time Monitoring: Provides near-instantaneous detection of cost anomalies.

Customizable Thresholds: Tailors detection sensitivity to the company’s needs.

Other Options:

Option A (EventBridge and Lambda) is complex and has delays in processing.

Option C (Cost Explorer) is manual and retrospective.

Option D (Flow Logs) detects network activity, but it cannot directly link to cost increases.

AWS Cost Anomaly Detection Documentation

Creating SNS Alerts for Cost Anomalies