The latest articles on DEV Community by Muhammad Alief Widjonarko (@aliefwidjonarko1005dotcom). https://dev.to/aliefwidjonarko1005dotcom 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%2F3837275%2F9352f129-0331-4951-b623-17e7f6afd561.jpeg https://dev.to/aliefwidjonarko1005dotcom en Muhammad Alief Widjonarko Sat, 21 Mar 2026 16:00:13 +0000 https://dev.to/aliefwidjonarko1005dotcom/i-built-a-cold-email-optimizer-in-48h-from-to-live-product-2aed https://dev.to/aliefwidjonarko1005dotcom/i-built-a-cold-email-optimizer-in-48h-from-to-live-product-2aed <h2> The Problem </h2> <p>Cold email is still the #1 B2B outreach channel. But most people struggle with:</p> <ul> <li>Writing multiple variants to A/B test</li> <li>Knowing which subject lines get opens</li> <li>Paying -99/month for tools that do way too much</li> </ul> <h2> The Build </h2> <p>48 hours. Pure HTML + JavaScript. No framework, no build step, no server.</p> <p><strong>Stack:</strong></p> <ul> <li>Frontend: Vanilla HTML/CSS/JS (glassmorphism UI)</li> <li>AI: Groq API (Llama 3.3 70B) — user brings their own free key</li> <li>Hosting: GitHub Pages (free)</li> <li>Payments: Gumroad ( lifetime)</li> </ul> <p><strong>Total infrastructure cost: /month</strong></p> <h2> How It Works </h2> <ol> <li>Get a free Groq API key at console.groq.com (60 seconds)</li> <li>Paste your cold email draft</li> <li>Click Generate</li> <li>Get 5 optimized variants in ~3 seconds</li> </ol> <p>Each variant: different tone (Direct, Professional, Bold, Empathetic, Casual) with optimized subject line + explanation of why it works.</p> <h2> Key Lesson </h2> <p><strong>Simple beats complex.</strong> First version was Next.js — multiple failed Vercel deployments wasted hours. Stripped to pure HTML, deployed in 10 minutes, works perfectly.</p> <p>** is the magic price point.** Below the 'think about it' threshold. Impulse buy for anyone doing cold outreach.</p> <h2> Try It </h2> <p><strong>Free tool:</strong> <a href="https://aliefwidjonarko1005-dotcom.github.io/email-optimizer/" rel="noopener noreferrer">https://aliefwidjonarko1005-dotcom.github.io/email-optimizer/</a></p> <p><strong>Lifetime access ():</strong> <a href="https://7848939965107.gumroad.com/l/xnntrz" rel="noopener noreferrer">https://7848939965107.gumroad.com/l/xnntrz</a></p> <p>Built with Groq API + Llama 3.3 70B. Feedback welcome!</p> saas startup ai productivity