We Send 8 Million+
Emails Per Month.
We Know What Converts.
B2B lead generation for companies with $1M+ in revenue. Launch a free test campaign and see results before you commit.
Trusted by industry leaders. Click to see results.
See Results Before You Commit
We'll launch a real campaign for your business at no cost. If it works, we talk. If not, you've lost nothing.
Apply
Tell us about your ICP, your offer, and your goals
We Launch
Real campaign, real prospects, real infrastructure
See Results
Get positive responses. Decide if you want more.
Quotes from Our Clients
Kyle Mallien
Founder @ Heritage Wealth Capital
"Eric has forgotten more about cold email than other people we've worked with. He's our go-to. We fly him out to speak on our stages every time we bring our mastermind together and have been doing so for the last two and a half years."
Varun Anand
Co-Founder @ Clay
"Eric is one of the most creative minds in outbound today. He is one of the most, if not the most, respected agency owner there is."
Click to Watch the Interview →
Leon
Snitcher
"Our work with Growth Engine X has led to our cold emails getting a better ROI than our branded Google ad keywords."
John Thomas
Head of Marketing @ Donut
"We worked with multiple agencies before Growth Engine X, and Eric is clearly working on another level compared to them. We've been working for a long time and expect to keep working with them long term."
The Results Speak for Themselves
8M+ emails monthly. 62K+ positive responses in 2025. Here's what that looks like.
How We Work Together
Free Test
Launch & Evaluate
We launch a successful free test, you evaluate
Weeks 1-2
Onboarding
Onboarding and inbox warm-up
Weeks 3-4
First Campaigns
First campaigns are being launched
Month 2
Scale Winners
Double down on what works
Ongoing
Optimize
Continuous testing and iteration
We Work Best With...
Best Fit
Usually Not the Best Fit
What's Included
Our Methodology
From your best idea to a positive response. Three pillars. Zero gaps.
Email Infrastructure
Done-for-you email deliverability setup and consulting. We follow all the best practices, but what makes us different is simple:
We always keep backup domains warming and ready. If your goal is to send 1,000 emails per day, we set up capacity for 1,500. That way, when any domain starts underperforming, we swap it instantly without any downtime.
Domain Flywheel
Continuous rotation ensures zero downtime
List Building
We don't just scrape. We analyze your best customers, then find everyone who looks like them.
Your Customers
Input your list
Enrich
Add 20+ data points
Analyze
Find patterns
AI Review
Batch API scoring
Validate
Claygent + Prospeo.io
Campaign Strategy
15-20 campaign ideas from day one. We test everything until we find winners, then scale.
Broad Campaigns
Evergreen campaigns that can reach the majority of your TAM. Built to scale.
Focused Campaigns
Narrow down on large triggers and specific pain points for higher conversion.
Niche Campaigns
Highly selective lists with only 100-500 people qualifying at any given time.
Check Out Our On Stage Presentation @ Sculpt As Clay's Largest User
Check Out Our Outbound Interview w/ Alex Hormozi
This video was just an interview opportunity. We have not worked with Alex Hormozi or his portfolio companies and this video is for educational purposes only.
What Our Partners Say
They get an inside look at our work and can verify our success.
Clay
Roger Tabchouri, Engineer
"Eric's workspace is consistently the most used workspace and he's our largest user. I trust you to push Clay to the edge of what it can do."
Smartlead
Vaibhav, Founder
"Eric is constantly in the top three of all generated replies across our entire platform and he just switches back and forth with other agency owners for those top spots. His email volumes and reply rates are verified by us as well."
Outbound Sync
Harris Kenney, Founder
"We get a behind-the-scenes look at Growth Engine X and their operations every day, and we would highly recommend them as one of our top agency partners. They really execute at another level."
HyperTide
Omer, Founder
"Eric is our largest user and gives us a ton of feedback on how to make the platform better. And he has purchased more domains than anybody else, so we can verify that his email volume is absolutely correct."
OpsKings
Stephen, Founder
"We built the analytics system on behalf of Eric's team and have seen the numbers first-hand. They're in another level of operations as far as comparing the other cold email agencies that we work with."
Bloom Partners
Chris Martinez, Founder
"It is our business to coach marketing agency owners to grow their business. Not only was GEX's outbound campaigns one of the most successful partnerships we've made, their processes are extremely well done and we recommend our other marketing agencies to work with him to grow their businesses."
And if you're not one for polished case studies, here's some raw screenshots of success
Ready to See What's Possible?
B2B companies with $1M+ revenue. Free test campaign. Real results.
Apply for Free Test →No commitment. See positive responses before you decide.