Boost Email Opens With AI in Seconds
Scores, critiques, and rewrites your email subject line.
# AI Email WriterWhat is Boost Email Opens With AI in Seconds?
TestMySubject is a free AI tool that helps you write better email subject lines. Just drop in your subject line and it scores it, critiques it, and gives you 3 improved AI rewrites instantly.
Problem
Users struggle to write effective email subject lines manually, leading to low open rates and reduced email campaign success due to lack of objective feedback and optimization.
Solution
A web-based AI tool where users can score, critique, and rewrite email subject lines instantly. Example: Input "Summer Sale" → receive a score (e.g., 60/100), actionable feedback, and 3 AI-optimized alternatives like "Last Chance: 50% Off Summer Styles!"
Customers
Marketers, sales professionals, and entrepreneurs who rely on email campaigns for lead generation, conversions, and customer engagement.
Unique Features
Real-time scoring based on engagement triggers, actionable critiques, and instant AI rewrites without requiring copywriting expertise.
User Comments
Saves time optimizing subject lines
Improves open rates significantly
Easy to use for non-experts
Free and instant feedback
Useful for A/B testing ideas
Traction
Launched on ProductHunt with 500+ upvotes, positioned as a free tool. No disclosed MRR/user count, but email marketing tools like similar products (e.g., CoSchedule) report $20M+ ARR.
Market Size
The global email marketing market is valued at $7.5 billion in 2023 (Statista). Over 4 billion daily email users (Radicati), with 47% of marketers prioritizing email engagement optimization (Litmus).
