Amazon CodeWhisperer

CodeWhisperer is the AWS-native choice, and its strongest selling point is exactly what you'd expect: it has memorized AWS SDK patterns better than any other tool. If you spend your days writing Lambda functions, CDK stacks, or S3 integrations, CodeWhisperer will autocomplete the exact parameter names and IAM policy syntax you need without documentation lookups. Outside AWS contexts, it underperforms. The free tier for individual developers is genuinely free with no hard caps. The security scanning feature (which flags CVEs in your code inline) is a unique offering no competitor matches at the free tier. For AWS-heavy shops: use it as a secondary tool alongside Copilot or Cursor.