AWS WAF
AWS WAF acts as a shield for your web applications by filtering out malicious traffic before it reaches your resources. It helps you block common attack patterns like SQL injection or cross-site scripting, ensuring that only legitimate requests hit your backend services.
This solution fits teams already invested in the AWS ecosystem who want integrated web security without extra costs. Since it includes an always-free tier, there is no upfront pricing barrier to get started, making it a low-risk option for basic protection needs.