Cold Email Subject Line Generator
Generate high-converting cold email subject lines in seconds. Our AI creates personalized subject lines using proven frameworks that get opened.
How to Write Cold Email Subject Lines That Get Opened
Your cold email subject line is the gatekeeper to your entire message. With average open rates hovering around 15-25% for cold outreach, a compelling subject line can mean the difference between your email being read or deleted.
Subject Line Best Practices
- Keep it short: Under 50 characters performs best, with 28-39 characters being the sweet spot for mobile devices.
- Personalize when possible: Subject lines with the recipient's name or company see 26% higher open rates.
- Create curiosity: Open loops that make the reader want to know more without being clickbait.
- Avoid spam triggers: Words like "free," "act now," or excessive punctuation can land you in spam.
- Test lowercase: All-lowercase subject lines often feel more personal and less promotional.
Proven Subject Line Frameworks
The Mutual Connection: "Quick question from [mutual connection's] network"
The Value-First: "Idea for [Company] re: [specific pain point]"
The Social Proof: "How [similar company] increased [metric] by X%"
The Direct Question: "Is [pain point] a priority for [Company] right now?"
The Pattern Interrupt: "This isn't a sales email"
What to Avoid
- ALL CAPS or excessive exclamation marks!!!
- Generic phrases like "Following up" or "Checking in"
- Misleading subject lines that don't match content
- Long, complex subject lines that get cut off
- Spammy words that trigger filters
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