The latest articles on DEV Community by Gurpreet Singh (@gurpreetsingh1979). https://dev.to/gurpreetsingh1979 https://media2.dev.to/dynamic/image/width=90,height=90,fit=cover,gravity=auto,format=auto/https:%2F%2Fdev-to-uploads.s3.us-east-2.amazonaws.com%2Fuploads%2Fuser%2Fprofile_image%2F4099074%2F7cda9114-e20e-4145-9934-dc8a71a5290b.jpg https://dev.to/gurpreetsingh1979 en Gurpreet Singh Fri, 28 Aug 2026 13:57:37 +0000 https://dev.to/gurpreetsingh1979/how-to-find-slash-20-40-off-your-aws-bill-in-5-seconds-with-costslash-2lp3 https://dev.to/gurpreetsingh1979/how-to-find-slash-20-40-off-your-aws-bill-in-5-seconds-with-costslash-2lp3 <p>Most AWS bills accumulate silent waste over time:</p> <ul> <li> <strong>Unattached EBS Volumes:</strong> Forgotten disks left behind when EC2 instances are deleted ($10–$100/month per disk).</li> <li> <strong>Legacy GP2 Storage:</strong> Upgrading older <code>gp2</code> volumes to modern <code>gp3</code> gives an instant <strong>20% price cut</strong> and faster baseline IOPS with zero downtime.</li> <li> <strong>24/7 Dev/Staging RDS:</strong> Non-production databases running through nights and weekends when no developers are online.</li> <li> <strong>Idle NAT Gateways:</strong> Staging VPC gateways that silently incur AWS's $32.85/month base fee with zero data processed.</li> <li> <strong>Unassociated Elastic IPs:</strong> Unused IPv4 addresses incurring hourly AWS penalty fees.</li> </ul> <p>To solve this, I built <strong>CostSlash</strong> — an open-source, read-only Python CLI tool.</p> <h2> ⚡ How It Works </h2> <p>CostSlash scans your AWS account concurrently across all active AWS regions using thread pools in about <strong>2 to 4 seconds</strong>.</p> <h3> 1. Install via PyPI </h3> <div class="highlight js-code-highlight"> <pre class="highlight plaintext"><code> bash pip install costslash ### 2. Run a Fast Read-Only Scan costslash scan --live --all-regions --commands ## 🔒 Security &amp; Privacy Guarantee • 100% Read-Only: Only calls read-only AWS metadata APIs (via Boto3). • Zero Root Keys: Uses your existing local authenticated AWS CLI session. • Client-Side: Zero data or telemetry is sent to any external server. ## 🔗 Links &amp; Resources • GitHub Repo: https://github.com/GurpreetSingh1979/costslash • PyPI Release: https://pypi.org/project/costslash/ • Live Web Platform: https://costslash-web.vercel.app Would love your feedback, stars on GitHub, and suggestions on what AWS service checks to add next! </code></pre> </div> aws devops python cloud