01
Most marketing copy is written on intuition. Cromulent replaces guesswork with evidence.
The science of persuasive communication
Let our AI find the cromulent words for your audiences. Learned, tested, always improving.
Cromulent optimizes your email marketing copy for conversion. Our AI learns what persuades each audience segment, then generates messages that get smarter with every send.
02
Generic AI copywriters don't know your audience. Cromulent learns what works for each segment.
03
Traditional A/B tests compare two variants. Cromulent runs adaptive experiments across dozens of latent dimensions at once, learning faster from every send.
How it works
From integration to optimization in three steps.
Step 01
Connect to your ESP
Cromulent integrates with Klaviyo (and soon Braze) via a simple OAuth connection. We pull in your audience segments, campaign context, and brand materials. Setup takes minutes, not weeks.
Step 02
AI generates copy tailored to each segment
Our system combines persuasion science with generative AI to produce copy optimized for your specific audience. It doesn't just write; it reasons about which emotional frames, proof points, and messaging strategies will resonate with each customer segment.
Step 03
Every campaign makes the next one better
Cromulent tracks what converts and updates its models daily. Over time, it builds a precise understanding of what your audience responds to: not just what works in general, but what works for your customers, your brand, your products.
See it in action
Same product, same promotion. Different words for different audiences.
Original (generic)
20% off all shoes, this weekend only!
One message for everyone.
Optimized for VIP repeat buyers
Your exclusive early access: 20% off before anyone else
exclusivitysecond personpride
Optimized for loyalty and exclusivity.
Optimized for lapsed customers
Still thinking about those sneakers? They're 20% off today.
curiosityloss framingquestion
Optimized for re-engagement.
Illustrative example. Cromulent optimizes copy across many such dimensions in production.
Not another AI copywriter
Science, not prompts
Most AI copy tools generate text from generic prompts. Cromulent is built by a marketing scientist with publications in Marketing Science and Nature, and optimizes copy using the same experimental methods used in peer-reviewed research.
Learns your audience
Generic tools produce the same copy for everyone. Cromulent builds a statistical model of what persuades each of your customer segments, and that model gets more precise with every campaign you send.
Measures what matters
Cromulent doesn't just optimize for clicks. It tracks opens, clicks, and conversions separately, learning which copy drives actual purchases, not just engagement.
Built by a scientist, for marketers
Justin T. Huang, Founder & CEO
Justin earned his PhD in Quantitative Marketing from the Stanford Graduate School of Business and was an Assistant Professor at the University of Michigan Ross School of Business. His research on digital platforms, causal inference, and machine learning has been published in leading marketing journals.
He built Cromulent to close the gap between persuasion science and marketing practice. The platform generates copy tailored to each audience segment, learns what converts from every send, and gets smarter over time.
“I spent years studying what makes people respond to messages, running experiments, building statistical models, publishing papers. Cromulent is what happens when you turn that research into a product.”
- Stanford GSB PhD
- Assistant Professor at Michigan Ross
- Published in Marketing Science & Nature
- Featured in NBC, NPR, Washington Post
Get early access
We're onboarding our first customers now. Join the waitlist for priority access and founding-member pricing.
No spam. We'll email you when your spot is ready.