In response to the financial pressures of the COVID-19 pandemic, organizations are increasingly focusing on cost optimization, particularly within cloud computing services like Amazon EC2. With enterprises spending significant amounts on public cloud platforms, optimizing these costs is a top priority. Chaos Engineering emerges as a valuable approach to test and ensure the reliability of cost-saving measures, such as transitioning from on-demand to Spot Instances, optimizing instance sizes, and identifying unnecessary infrastructure. By using techniques like Gremlin to simulate system failures, businesses can confidently implement cost-saving strategies without compromising service reliability, thereby balancing fiscal prudence with operational efficiency.