Claude Code Analyzed Our Best Performing Cold Email Campaigns, Here’s What It Found:

Hey, it’s Christian from the RevGrowth newsletter.

I’m emailing you a 3-minute insight that you can implement today to start generating more leads from your outbound campaigns.

In today’s newsletter, I’ll be going over insights Claude Code gave us after analyzing 1,000+ of our cold email campaigns from 2025.

In 2025 alone, we launched over 1,160 unique cold email campaigns and tested 4,055 email script variants across 102 different industries.

And now with the capabilities of Claude code, I was able to extract all of this data via EmailBison’s API and interpret the data with AI.

Here’s what Claude Code found:

[Claude Code output] Here are 7 common traits shared across the top-performing campaigns:

Every top campaign opens with a short question about the prospect's current situation — not about the sender's product. "Have any flooring projects coming up?" "Projects ramping up?" "Gearing up for new builds?" It immediately signals relevance and gets the prospect thinking about their own needs before you pitch anything.

The best campaigns don't sell — they offer something the prospect can say yes to without commitment. A playbook built for a similar company. A lunch & learn covering specs and ROI math. A free breakdown of cost savings. The email exists to deliver or offer that asset, not to book a meeting.

The closing ask is always low-friction and framed as the prospect granting permission: "Mind if I share it?" "Interested in a breakdown?" "Want me to send it over?" "Open to a lunch & learn?" These outperformed direct meeting requests, "would it be crazy" framings, and "are you the right person" questions by a wide margin.

Top campaigns include hard numbers: "cuts costs by 80% per square foot," "$4/sq ft savings," "saves weeks versus mitigation." They don't say "more cost-efficient" — they say exactly how much. The prospect can immediately calculate whether it's worth their time.

The highest-performing campaigns used {PROJECT}, {LOCATION}, and {COMPANY} to reference the prospect's actual work. One campaign referencing specific construction projects and locations hit 14.5% reply rates — while the generic version of the same script from the same workspace averaged 1-3%.

When a top campaign referenced a case study, it named a specific well-known company (e.g., "a playbook we created for Hasbro"). This gives the asset instant credibility and makes the prospect curious. Generic "we helped companies like yours" never appeared in the top performers.

Top campaigns read like a short message from a real person — not a marketing email. They use dashes instead of colons, contractions, and sentence fragments. "Thought to share" not "I wanted to take a moment to introduce." The warmth is subtle but consistent across every winner.

As you can see, we practice what we preach — and it’s reflected in our campaign data.

Since I had this hyper-valuable data laying around, I figured to create a resource for you all with it.

So I went ahead and put together a vault of the top 10% of email scripts (210 email scripts total) we used in 2025 so you can take insights from our best campaigns and implement them for yourself here:

[[ Get Access To Cold Email Script Vault ]]

This vault is an incredibly valuable resource to use as context for AI to assist you with script writing as it takes direct inspiration from scripts that have actually generated results.

These are the exact scripts we used for our campaigns to generate 1,000s of leads in 2025 for our clients.

Keeping this at $37 for the meantime but will price increase if I see too many people buying (don’t want to oversaturate this data).

If you have any questions about the scripts vault, feel free to reply to this email.

Here’s the link again in case missed:

[[ Get Access To Cold Email Script Vault ]]

Have a blessed day,

Christian

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