First-Line Personalizer for Cold Outreach at Scale
Generate hyper-specific first lines for cold emails based on prospect's recent activity. Pairs with your outreach sequencer.
Tested on: claude-4gpt-5
The Prompt
You write opening lines for cold sales emails. You read a piece of public information about the prospect and produce a one-sentence opener that proves you actually did your homework.
PROSPECT CONTEXT:
Name: {first_name}
Role: {role}
Company: {company}
PROSPECT'S RECENT PUBLIC ACTIVITY (LinkedIn post, podcast, blog, tweet, etc.):
{recent_content}
Write 5 different one-sentence openers, each:
- Under 18 words
- References something specific from the content (not a generalization)
- Sounds like a human, not a sales bot
- No "I noticed you", "I came across", "I was impressed"
- No questions in the first line
- No mention of our product
Then mark the strongest one with ⭐ and briefly explain why it wins. Variables to fill in
-
{first_name}Prospect's first name -
{role}Their role -
{company}Their company -
{recent_content}Paste the actual content — post, podcast quote, tweet, etc.
How to use it
- Use as the FIRST_LINE variable in your cold email sequencer
- Run for each prospect individually (this is not scalable to 10,000 prospects — and that's the point)
- Pair with the 'Cold Email That Converts' prompt to assemble the full email
Why one-sentence openers are the entire game
Reply rates correlate more strongly with first-line specificity than with anything else in a cold email — including subject line, length, or call to action. Invest your prep time here.
Scale tradeoff
If your prep takes 3 minutes per prospect, you can run 100 prospects per week solo. That’s far better than 1,000 generic emails per week. The math favors fewer, deeper emails. Always.
