What we learned from 12.2 million cold emails

Earlier this year, I asked Claude to review 12.2 million cold emails and tell me which ones were booking meetings.

Ever since then, we’ve used the learnings internally to create all our new clients’ cold email copy.

For years, we had written copy based on what I personally thought would do best, what the founder thought would be best, and a ton of variations in between.

Then we started writing all of our cold emails with AI to create hundreds of variations and test them all at super high volume.

This worked for a long time, until today where we have a human write every single email we send out because of AI spam filters we’re seeing across Gmail and Outlook recipients.

After analyzing those 12.2 million emails, our human copywriter is able to have a good guess of where to start for subject lines, tonality, value propositions, and more.

I've gone through those findings below, along with examples of how I'd write our very next email.

Let me know if you find it valuable: