Hey, it's Geb from Email Rev Lab!
At 9:08 pm last night, I scrolled to the bottom of KOS's homepage and typed my email into a plain footer form.
No pop-up. No exit intent. No discount promise.
Just "Stay in the loop. No spam, ever." And a "Join" button.
By 9:09 pm, my inbox had their welcome email. Primary tab. Clean sender name. One minute flat.
That timing is genuinely impressive. Most brands fumble this. KOS isn't.
But the email itself told a different story.
The Brand Behind It:
KOS was founded in 2017 by Allan Stevens and Tony Stahl. They weren't supplement guys. They were online marketers. Then, a former colleague named Tucker Heinz was diagnosed with cancer at 40. Stevens was the one who got the call. It shook him enough to rethink everything.
They named the brand after the Greek island where Hippocrates was born, the guy who said, "Let thy food be thy medicine." That's not a marketing angle. That's a conviction.
A brand born from that story deserves a welcome email that carries it. This one doesn't.
The Pop-up Test:
There isn't one.
No pop-up means zero incentive to subscribe before a buyer decides to leave. The footer form is quiet. Passive. It captures the already-converted, not the on-the-fence visitor.
That's a leak before the email funnel even starts.
The Tech Test:
One-minute delivery. Primary inbox. Excellent.
This is where KOS wins. Most brands I audit take 5 to 10 minutes. KOS is doing this right.
The Inbox Test:
Subject line: "Cheers To Your Wellness Journey."
It's warm. But it's generic. It won't win a crowded inbox on a Tuesday morning. There's no curiosity gap. Nothing to click for.
The Email Creative Test:
The welcome email offers 10% off the first purchase. The code is right there. That part's fine.
But the copy opens with "we'll only be sending you content that'll be of the utmost value." That's a promise, not a hook. It doesn't pull anyone in.
The KOSmonauts community section is buried near the bottom. For a brand built on belonging, that should be the opening act, not the closing footnote.
The Fix (Klaviyo):
Add a timed pop-up with the 10% offer. Set it to trigger at 5 seconds on desktop, scroll-depth on mobile. The offer is already there. Just put it in front of people before they leave.
A/B test the welcome subject. Try: "Your 10% code (expires in 48 hours)." Urgency and specificity beat warmth every time.
Reopen Email 1 with the Tucker Heinz story. One paragraph. No fluff. That founding moment is the strongest thing KOS has. Use it.
Most supplement brands lose 30 to 40% of potential subscribers simply because there's no pop-up to capture intent in the moment.
Here's what I'm curious about: what's KOS's current footer opt-in conversion rate versus what a pop-up would generate?
KOS has the infrastructure and a founding story most brands would kill for. They just need the front door to match the house.
I send these audits daily because bottlenecks like this can be fixed in one day with the right information.
Want me to audit your Klaviyo account the same way?
Reply to this email and I'll send you a free breakdown of where your welcome series is leaking revenue.
Geb Vence
P.S. I run Email Rev Lab. We've generated $334k+ for brands by building systems that feel like conversations, not ads. I only work with 3 brands per month. Schedule your call here.