First lines

The first line is the most important sentence in a cold email. If it sounds templated, the reader deletes. If it shows you know something specific about them, they read on. This is where personalization either happens or fails.

The bar

A good first line is impossible for the recipient to ignore because it's clearly about them specifically. It references something that could only apply to this one prospect: their recent post, their role change, their company news, a specific detail.

Sources of specificity

Their LinkedIn activity

"Saw your post yesterday about [specific topic]"
"Your comment on [X's] thread on [topic], had been thinking the same thing"

Their company news

"Just saw the Series B, congrats"
"Noticed you're hiring three AEs, usually means something specific about pipeline"

Their role change

"Saw you moved to [company] last month from [previous]"
"Congrats on the VP of Marketing move"

Their content

"Read your piece on [topic] in [publication] last week"
"Your podcast episode on [specific ep], the part about [X] stuck with me"

Industry context specific to them

"Your vertical in [state] is getting hit hard this quarter with [specific change]"
"Restaurants in [city] are dealing with [specific issue], wanted to run something by you"

What doesn't count as specific

• "I see you're a VP of Sales at [Company]" (their title is not news)
• "Your company is a leader in [industry]" (flattery, also generic)
• "I noticed [Company] has [generic trait]" (obvious fact)
• "Happy Tuesday!" (ask yourself why this belongs in a business email)

The first line at scale

For 10 prospects, write custom lines by hand. For 100, use Claude + enrichment data (LinkedIn posts, company news). For 1000, use Clay or similar with an AI step to generate custom lines from structured data.

For each prospect below, write ONE first line of a cold email (12-20 words) that references something specific to them.

Rules:
- No "Hope you're well"
- No "I came across your profile"
- No generic congrats
- Reference the trigger specifically
- Feel like a peer writing, not a template

PROSPECTS:
1. [Name | Role | Company | Trigger detail]
2. [Name | Role | Company | Trigger detail]
...

The fallback when you have nothing specific

If you truly can't find anything specific, don't pretend. A good second-tier opener:

• "We work with [Role]s at [Company size/type] on [specific problem]."
• "Short version: [one-sentence pitch]. Wanted to run it by someone in your seat."

Honest and brief beats fake personalization. The email does worse but doesn't actively burn trust.

The craft

Great first lines take 2-5 minutes of research per prospect. For high-value targets, worth every minute. At scale, AI-enriched data brings this down to seconds. But the underlying principle holds: specificity is the only thing that proves "this isn't a blast."