Subject lines
Subject line ideas
Ten short, plain subject lines for a cold email, ready to test.
The prompt
Suggest 10 subject lines for this cold email:
{{email}}
Rules:
- Two to five words each, mostly lowercase.
- No sales words (free, offer, guarantee), no emoji, no exclamation marks, no fake "Re:".
- Make them sound like a note from a colleague, not a newsletter.
- Mix three styles: a question, the prospect's company or topic, and a short curious phrase.
Return them as a numbered list.Example of what it writes
1. quick question 2. northwind's austin office 3. idea for your sdr team 4. outbound in austin? 5. a thought on reporting
How to use this prompt
- Copy it into any AI tool, such as ChatGPT or Claude.
- Replace each {{field}} with real details about you and the person you're writing to. The more specific they are, the less generic the result.
- Check every fact, name and number in what comes back: AI can sound sure about things that aren't true.
- Cut it down if it runs long. A cold email reads best under about 75 words.
- Send it to yourself and read it on your phone before anyone else sees it.
More ways to use AI well are in AI for cold email: where it helps and where it hurts.
More prompts.
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