EmailSubjectScore Pro — Email Spam Risk & Subject Line Scorer for Gmail

Score spam risk, clarity & open rate for every email subject line in Gmail. AI rewrite suggestions in one click.

Every cold email, sales outreach, and important message lives or dies by its subject line. EmailSubjectScore Pro is a free Chrome extension that scores your email subject lines in real time inside Gmail — rating spam risk, clarity, and urgency on clear scales. When your score needs work, one click generates AI-powered rewrite suggestions that beat your original. Stop guessing and start sending subject lines that get replies. ✨How it works 1. Open Gmail and click Compose 2. Type your subject line — scores appear automatically as you type 3. See three color-coded ratings: Spam (0-100), Clarity (0-10), Urgency (0-10) 4. Click "Suggest rewrite" for 3 AI-generated alternatives 5. Click "Use this" to replace your subject instantly 6. Send with confidence 📋Features - Real-time subject line scoring inside Gmail compose — no tab switching - Three-axis scoring: Spam risk, Clarity, and Urgency - AI-powered rewrite suggestions that improve on your original scores - Color-coded score badges (green/yellow/red) for instant feedback - Works with Gmail light and dark mode - 50 free scores per month — no signup required - Lightweight: under 60KB, no slowdown - Privacy-first: subject text processed ephemerally, never stored 🔴 What we DON'T do - Never read your emails — only the subject line you type - Never track opens, clicks, or recipients - Never store your subject lines on our servers - Never sell your data - No account required for the free tier 🟢 Why not Boomerang / Mailtrack / ChatGPT for Gmail? - Boomerang Respondable scores subjects but costs $15/mo and doesn't suggest rewrites - Mailtrack tracks opens but doesn't score subjects at all - ChatGPT for Gmail generates text but doesn't score against a structured rubric - EmailSubjectScore Pro does both — score AND rewrite — free to start 🍻 Built for cold emailers, sales reps, and founders If you send important outbound emails from Gmail — sales outreach, recruiting, fundraising, freelance pitches — your subject line is the gate. EmailSubjectScore Pro is the quality check before you hit Send. 👋About EmailSubjectScore Pro is built by Amrita Labs. No bloated sales suite, no enterprise pricing, no feature creep. One job: score your subject line and help you improve it. Questions or feedback? hello@amrita-labs.com