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AI-powered Gmail cold email engine. Write, personalize and send high-converting emails at scale — without leaving your inbox. BlitzForge AI is an AI-powered cold email engine that lives inside Gmail. Write personalised outreach emails, run multi-step follow-up campaigns, and track replies — all without leaving your inbox. Stop spending hours writing cold emails one by one. BlitzForge generates high-converting emails from a prospect's name, company and role — with spintax variation so every email feels unique. ✦ AI EMAIL COMPOSER Generate personalised cold emails instantly. Enter prospect details and BlitzForge writes a compelling subject line and email body — with merge tokens {{firstName}}, {{company}}, {{role}} for mass personalisation. ✦ SPINTAX VARIATION ENGINE Use {variation1|variation2|variation3} syntax to create hundreds of unique email variants from a single template. Preview any combination before sending. ✦ SUBJECT LINE OPTIMIZER Generate 3 scored subject line variants for any email. See predicted open rate scores so you always send the strongest subject. ✦ SPAM SCORE CHECKER Check your email against 50+ spam trigger words and patterns before sending. Get a score and specific suggestions to improve deliverability — works offline, no API needed. ✦ MULTI-STEP FOLLOW-UP SEQUENCES Build automated follow-up sequences with configurable day delays. BlitzForge uses chrome.alarms to check every 30 minutes and reminds you when follow-ups are due. ✦ CAMPAIGN DASHBOARD Track every campaign: total sent, replies received, reply rate. See which sequences are performing and pause or resume any campaign instantly. ✦ CONTACT LIST MANAGER Paste a CSV with email, firstName, company, role columns. BlitzForge merges your contact data into every email automatically. ✦ WORKS IN Gmail (mail.google.com) FREE PLAN: 1 campaign · 10 contacts · 3 follow-up steps PRO PLAN ($9.99/mo): Unlimited campaigns · Unlimited contacts · Full sequence automation Your API key and campaign data are stored locally only. Nothing is sent to our servers.