The Klaviyo Experiment Lab For Ecom Brands

WE TURN YOUR
KLAVIYO
INTO A LAB.

We run the experiments. You get the results.

Most agencies build your flows and move on. We run the Klaviyo Lab. Built by a former NASA atmospheric physicist with ten years on Klaviyo.

Book the diagnostic audit How we work
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Klaviyo Experiment Lab Run by an ex-NASA Scientist We're a Klaviyo Partner Data-First Strategy 20 Years in Ecom 10 Years on Klaviyo Klaviyo Experiment Lab Run by an ex-NASA Scientist We're a Klaviyo Partner Data-First Strategy 20 Years in Ecom 10 Years on Klaviyo
+81%
Attributed revenue
in two months
// UK Homewares · £12m+
+476%
Revenue increase
from email
// UK Fashion · £6.4m
95%+
Inbox placement
through BFCM
// UK Beauty · £9.8m
PhD
Our founder did a PhD in atmospheric microphysics. We apply this to the only experiment that matters: your revenue.
NASA
Where the experiment mindset was formed. When data has planetary scale consequences, you learn to take it seriously.
10
Years on Klaviyo. Using it and understanding it at depth in complex accounts across multiple sectors.
Klaviyo Partner
// Currently working with
5 ecom brands
across UK and US
Revenue range: £0.5m–£20m/year · 1 slot remaining for Q3 2026
[Fashion] [Homewares] [Beauty] [Pet]

"[We brought Poisondart in for a full Klaviyo overhaul and ended up keeping them for 2 years because the results just kept compounding. Welcome series conversion was up ~40%, post-purchase AOV +22%, win-back revenue tripled in some segments. Inbox placement stayed 95%+ through scaling and BFCM peaks']"

[Ben N., Managing Director] · [8-fig DTC Natural Baby Skincare Brand]
// What makes us different
Your Klaviyo
experiment lab.
Most agencies build your flows and call it done. Maybe they'll fire off a campaign or two. We treat your account as an ongoing experiment - changing things deliberately, watching what happens, learning from it, and using those findings to make the next change smarter. Every month, your account gets more intelligent.
01 //
The Experiment Mindset
A PhD-trained scientific mind applied to your Klaviyo account. We approach complex systems methodically, pay close attention to what the data is actually saying, and keep asking why until the answer makes sense.
02 //
Decoding Messy Data
Most agencies bounce off complex, dirty Klaviyo accounts. Our founder spent years working with atmospheric datasets that would make your CRM look like a 2-row spreadsheet. Large, complicated data is familiar territory.
03 //
Flow Architecture
Welcome, abandoned cart, post-purchase, win-back. Built properly, not from templates. Each flow is a living system, iterated and improved continuously based on what the data shows.
04 //
Segmentation
RFM modelling, behavioural analysis, predictive segments. We build segments based on what customers actually do, not just when they last bought or how much they spent.
05 //
Campaign Strategy
Every send is considered and every result is looked at. Campaigns get smarter over time because someone is actually paying attention to what the data says after each one.
06 //
Revenue Attribution
We can tell you exactly what your email programme is worth and exactly what it should be worth. The gap between those two numbers is where we focus our work.
// How we work
How the
lab runs.
01 //
Diagnose
We go into your Klaviyo account and pull it apart. Deliverability, flows, segmentation, revenue attribution, campaign logic. Looking for the gaps, the underperformers, and the opportunities nobody has spotted yet. Takes 72 hours. Written up properly.
02 //
Formulate
Before we touch anything we form a view on what is wrong and what fixing it is worth. The highest-leverage changes go first. Every change has a clear rationale before we make it.
03 //
Experiment
We make the changes, watch what happens, and adjust based on what the data shows. Flows are built and improved. Campaigns planned and sent. Nothing set and ignored. The experiment is continuous.
04 //
Compound
Each month builds on what the previous month taught us. Your account gets smarter, the experiments get more targeted, the results compound. That is the point of running a proper lab rather than just an email account.
// lab_log · experiment_001

abandoned_cart: trigger at 4hrs post-abandon
 recovery_rate: below benchmark
 action: move to 45min · RR nearly doubled

welcome_series: 1 email · never updated
 RPR: significant gap to benchmark
 action: rebuild to 4 emails · RPR 4x

win_back: not configured
post_purchase: not configured
segmentation: date filters only

// month 3: five figures recovered/mo
// Experiment zero

The Diagnostic
Audit

The first experiment. We go into your account and find out what is actually happening. The gaps, the underperformers, and what fixing them is worth. Delivered in writing within 72 hours.

£1,500 / $1,800
Credited in full against your first month.
Book the diagnostic audit
What we examine
Flow logic, triggers and timing gaps
Deliverability and domain health
Segmentation quality and coverage
Revenue attribution accuracy
Historical experiment quality
Benchmark vs industry norms
What you receive
Written findings document (10-15 pages)
Estimated revenue gap with workings shown
Prioritised experiment roadmap (months 1-3)
Honest recommendation on fit
Delivered within 72 hours
Yours to keep, regardless of next steps
// The programme

Three tiers.
One lab.

We deliberately only work with 3 to 5 clients at any time. Fewer clients means deeper work, closer attention, better results. The tiers below reflect different levels of engagement at the same standard of quality.

Tier 01
Catalyst
£4,500/mo
$5,500/mo · 3-month minimum
The catalyst. We fix what's broken, and start running the first experiments.
→ Klaviyo account audit
→ Up to 3 flows built and tested
→ 2 A/B experiments per month
→ Statistical significance reporting
→ Segmentation foundations (8 segments)
→ Monthly 60-min review call
Book the diagnostic audit
✦ Most popular
Tier 02
Compound
£7,500/mo
$9,000/mo · 6-month minimum
The compound. Ongoing experiments across flows, campaigns, and segmentation. Every month building on what the last one taught us.
→ Everything in Catalyst, plus:
→ Up to 6 flows, continuously optimised
→ 4 A/B experiments per month
→ Multiple campaign sends per month
→ Full RFM segmentation model
→ Dedicated Slack channel
→ Written experiment log (yours forever)
→ Quarterly strategy review
Book the diagnostic audit
Tier 03
Apex
£12,000/mo
$15,000/mo · 12-month min · max 2 clients
Full lab partnership. Deep ongoing experimentation, predictive modelling, and continuous improvement. Maximum two clients at this tier simultaneously.
→ Everything in Compound, plus:
→ Unlimited flows
→ Multivariate testing programme
→ Predictive LTV segmentation
→ Unlimited campaigns per month
→ SMS integration
→ Quarterly half-day strategy session
→ Direct access to the full team throughout
Book the diagnostic audit
All prices exclude VAT where applicable. Audit fee credited against first month of any retained programme. Questions about the programme? Get in touch →
// Honest small print

This probably
isn't for
everyone.

We are selective about who we work with. This is a practical reality of maintaining quality across a small portfolio.

✓ Good fit
Doing at least £1M/year in ecom with email as an underperforming channel
On Klaviyo, or willing to migrate
Care about methodology as much as output
Want to understand why things work, not just observe that they do
Looking for the highest-ROI option, and willing to pay for it
Want their email programme to compound in intelligence over time, not just perform this month
Ready to treat email as a serious revenue channel, rather than a marketing afterthought
✗ Probably a bad fit
Want someone to send a newsletter twice a month and call it a strategy
Have 47 approval layers before anything goes live
Want to see results before investing in the work that produces them
Treat email as a box to tick rather than a revenue channel to optimise
Want a cheaper version of this (spoiler alert - there isn't one)

Time to open
the lab.

The diagnostic audit is experiment zero. We go into your account, find what is wrong, and tell you exactly what fixing it is worth. In writing. Within 72 hours.

Book the diagnostic audit