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Subject Line Testing

Eric Eden
Sep 4, 2025
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Subject Line Testing

Generates 10 cold email subject lines tailored to a role and company type. Balances personalization, curiosity, social proof, and direct value while avoiding spam triggers under 50 characters.

Prompt

Generate 10 cold email subject lines to send to a [target role] at a [company type]. Include 3 based on personalization, 3 on curiosity, 2 on social proof, and 2 on direct value. Each must be under 50 characters and avoid common spam trigger words.
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Co-founder of Prompt Magic and ThinkingDeeply.ai Career Chief Marketing Officer

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