It writes as you.
Learned from the emails, pages and product shots you’ve already shipped.
Your backlog is a list of tests nobody has time to run.
Serravee clears the queue.
One goal in. A finished experiment out.
One win-back email, from the first finding to the next test.
Your sleep noticed.
It's been two months since your last jar.REORDER MY ZESTWorth testing01
Remind buyers who stopped reorderingAudience120 lapsed buyersEst. a month$640The openingTwo months since their last jar. No reminder to reorder.
Ready to review
Written for this audience
Designed in your brand
One clear action
Take 15% off.It's been two months since your last jar.REORDER MY ZESTSerravee Sim · 120 AI shoppersPredicted: B
A · Take 15% off28% pick A
B · Your sleep noticed72% pick B
Day-60 reorder reminderReady to approve this experiment?Approve itNothing goes out until you say so.
Sends to108
Held back12
Same email · day 6 of 14Live
Revenue per person| Group | Latest read |
|---|---|
| Got the email | $6.08 |
| Held back | $5.21 |
Latest read
Ahead, not yet sure. More data needed.
Day-60 reorder reminderWon
+18.4%per person · $6.12 against $5.17 held backThe reminder earns its place. Keep it running.
What to test nextRemind at day 45 instead
Next testbuilt from this result
It finds buyers who stopped reordering, and the email worth testing.
It writes the email and designs it in your brand.
Serravee Sim reads both finished emails with the same audience, and predicts which wins.
You approve the email. A held-back group gives the result something to measure against.
See how the groups compare and what to do next.
Keep the winner. Test an earlier reminder next, using what this email taught you.
One brief. Every creative.
One test brief becomes the email, the text, the post, the ad and the page. Every example here is real Zest and Sperm Worms work. Email is in beta. The other channels are on the way.
Better mornings start before bedHoldback test
Email · sent Aug 27takezestInstagram
takezestZest x bettersleep. Rest well. Rise ready.
Instagram postZestText message
Tonight 9:12Better mornings start before your head hits the pillow. Take Zest tonight.
ZestSponsored
takezest.comMeet Your New Wake-Up PillShop now
Meta ad
Live home pageThis is the bar every draft has to clear.
Serravee learns the look from what the brand already ships. Every draft is built from the brand's own photos and lines.
SW8 hours left on the July 4th saleA/B test
Email · July 4th saleSW
spermwormsInstagram
spermwormsCute date ideas in NYC.
Instagram postSW
Sperm WormsText message
Today 3:59Don't let your 17.76% off gift slip away! 8 hours left. Use code JULY04 at checkout.
SW
Sperm WormsSponsored
spermworms.comShoot like a Fire HydrantShop now
Meta ad
Live home pageThis is the bar every draft has to clear.
Serravee learns the look from what the brand already ships. Every draft is built from the brand's own photos and lines.
Email first. Then every place you sell.
Each channel opens as it's ready.
- 01EmailBetaCampaigns and flows in your brand, saved to Klaviyo as drafts.
- 02SMSComing soonTexts timed to the moment, tested against the ones you send now.
- 03WebsiteComing soonNew pages and offers, split against what's live.
- 04SocialComing soonPosts in your voice, judged on sales, not likes.
- 05Paid adsComing soonAds proven on a small group before you spend more.
- 06Direct mailComing soonReal postcards to real doors. A matched group gets none.
- 07AI shoppingComing soonYour catalog, ready for the AI agents that shop for people.
- 08AI chatComing soonGet named in AI answers. Add chat that sells on your site.
Working now
- 01BI analyst
- 03Lifecycle manager
- 07Copywriter
- 08Designer
Draft ready. Waiting on you.
It waits in Klaviyo. Only you can send it.
$490 a brand a month on Launch. See pricing
Know which email wins before a customer sees it.
Once the email is built, Serravee Sim uses AI to simulate your market: shoppers modelled on your customers read the finished versions, exactly as they would land, and Serravee Sim predicts which one wins. Only the winner reaches real people.
Serravee SimZestWin-back email · 120 AI shoppersSimulated on sample data.
Two versions. Only the headline changes.A · the offerREORDER MY ZEST
Take 15% off.
REORDER MY ZESTB · the reminder
72% pick BREORDER MY ZEST
Your sleep noticed.
REORDER MY ZESTHow Serravee Sim works
Simulate audiences and markets with your brand data, then predict how they respond. Figures below illustrate the method.
All your audiencesYour brandHow they buyShopper behavior research
Serravee SimMillions of data points
A · The offer
HeadlineTake 15% off.
B · The reminder
HeadlineYour sleep noticed.
Same market conditions. Only the headline changes.
A · The offer28%
B · The reminder72%
Simulated picks, not sales. The real test comes next.
Predictions vs real resultsSample data
- 033Predicted BA wonMiss
- 035Predicted APending…
- 036Predicted B · 72%B wonMatch
82%Illustrative overall match rate.
Every result trains the world's largest data set of prediction models for marketing.
Millions of data points: all your audiences, how they buy, shopper behavior research and your brand.
The same audiences compare both finished emails, exactly as they'd arrive.
Their choices point to the version worth testing with real people.
Real results check every prediction, misses included. Each one trains the world's largest data set of prediction models for marketing.
A growth team's whole job, in one place.
The math runs in code.
Code picks the test, sizes it and grades it from your orders. Same data, same answer.
Most people get the email. A random 20% don't. The gap is the lift.
Half get A, half get B, the same week. The better one wins.
The same people, two time windows. For when no one can be held back.
- Got the email
- 4,800 people · $5.74 each
- Held back
- 1,200 people · $5.41 each
+6.1%Revenue per person, read against the held-back group.
Demonstration figures are sample data.
Picks this when two drafts both look good and you want the better one.
Picks this when a holdback isn't possible, like a change to the site.
It builds the whole thing.
- Zest winback emailReadyQueued
- Welcome flow4 emailsQueued
- Subject lines3 variantsQueued
- Control groupHeld backQueued
Copy, design, variants and a control group, ready to ship.
It plugs into your stack.
Every test starts from all your data at once.
It runs the plays the best operators use.
CreativeA hundred micro-creators, not one name
LifecycleRefill timing, not a reminder blast
AcquisitionKill the discount spin wheel
Vs controlPicked for your account. Each one runs against a control.
It's multiplayer.
- YouShorten the intro.
- SerraveeOn it. Watch the panel.
- CopywriterKeep the sleep slump line.
Email · Zest winback
The summer sleep slumpSleep better tonight. Zest can help.
Talk to it from iMessage, Slack or WhatsApp.
Start a test, approve a draft, ask what's working. No dashboard to open.
iMessageSlackWhatsApp
SerraveeiMessage
Run a winback test on lapsed VIPsOn it. Control held back. Draft ready to review.What's working this week?The winback. +9.2% per person, still ahead on day 6.
Keep work moving.
Ask for your next test. Serravee finds the opportunity, builds the work and brings you a clear next move.
Serravee · Zest
Ready to review
- CheckRun 032 checked. Still ahead.
- BuildRun 033 built.Your callReview
- NextRun 034 ready to start.
Start with one brand.
Book a demo, connect Klaviyo, and see the audit and your first ranked tests before you pay. The trial runs on your own store.
LaunchStart free
$490/ brand / month
- An AI growth team that finds, builds and grades your tests
- 1,500 AMPs included, unused ones roll forward
- 10¢ for each AMP past that
- 1 brand, 5 seats
- Free trial after a short demo
ManagedFirst test in a week
from$2,500/ month
- A 90-day test plan, ranked by what each test could earn
- 8 finished assets a month: emails, flows, SMS, pages or ads
- First test live in under a week
AgencyFor agencies
Per deal
- Every client brand in one place
- One AMP pool shared across brands
- Reports in your agency's name
- A partner lead on our side
Connect your store. It finds the first test.
It comes back with your first experiment, built in your brand and waiting for your OK.
Today, Serravee reads Klaviyo, Shopify and Skio, ranks what to test, and writes each email as a Klaviyo draft that only you can send. More channels open as they are ready.
- Connect Shopify
- Connect Klaviyo
- First email flow drafted
Your first email flow, set up in under 15 minutes.
Klaviyo draftThe summer sleep slump
You press send.