Grow & Convert
Klaviyo Agency
Klaviyo, built properly.
(opens in a new tab) Klaviyo is the default for Shopify and most accounts use a fraction of it. The gap is rarely the tool, it is the architecture underneath it. We build that first, then the flows, on the same setup we run on our own stores.
We are a Klaviyo partner and a Shopify Plus Partner, so the account and the store feeding it sit with one team.
Klaviyo accounts we build, verify and run.
Certified, not badge-only Most klaviyo agencies sell flows. We build account architecture first.
Read the case studiesA welcome series built on a segmentation model that falls apart at scale gets rebuilt within a year, and that rebuild costs more than getting the foundation right the first time.
Our servicesHow we run a Klaviyo project
How we rebuild a Klaviyo account without losing the list
The audit comes before any flow, and the architecture before any build. The people who fix the account are the people who run it afterwards.
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Account audit
What is live, what is orphaned, what is firing over the top of something else, and what the integration is not sending.
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Architecture
Structure, naming and event tracking corrected before new flows are built on top.
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Build
Lifecycle flows and segments, with suppression logic written down.
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Operate
Ongoing testing and campaign support, reviewed monthly.
Build
The account underneath the emails: its structure, its sending domain and the store data it reads, put right before anything new is built on top.
Klaviyo partner
An account structure we test on our own list first
Powerlete is our own sportswear brand, and we run its Klaviyo account ourselves. Naming, folders, the events the store sends and the order flows fire in are decided there before we recommend them anywhere else.
It also means the stakes are ours. When an account gets hard to read, or a send lands badly, it is our revenue that moves first, which is a strong reason to treat the structure as infrastructure rather than housekeeping.
Klaviyo deliverability
Sending moved with the store, not after it
Bessette sells new, curated designer fashion at a discount. Part of the brief was a project most agencies steer clear of: moving the store, the domain, the email and the tracking onto new footing without losing the rankings already earned.
Klaviyo was part of that move. We verified it across every sending platform, alongside the Merchant Center setup and the product feeds. Sending authentication is the part of a migration nobody sees until it goes wrong, which is why it sits in the plan rather than after it.
What you get
What our Klaviyo service covers
Six pieces, in three groups. Klaviyo earns its price on what it knows about a customer from the store, so the data comes before the sending.
The account
Account architecture
Naming, tagging and folders decided up front, so forty flows stay legible.
Reporting
Attribution that reflects how you count revenue, not the default that flatters every flow.
The data
The Shopify integration
Beyond the default sync: the custom events and properties real segmentation needs.
Catalogue feed
Set up properly, so product blocks and recommendations read what the store actually holds.
The sending
Flow logic
Suppression and priority, so a customer in three flows gets one sensible email.
Consent
How a signup is recorded and suppression is honoured, decided at setup.
Grow
Flows and segments that use what Klaviyo knows about a customer, instead of a calendar that sends the same thing to everybody.
Klaviyo email marketing agency
Retention flows on a store built for subscriptions
Fittr Nutrition is our supplements brand, best known for its creatine gummies. Its subscription programme has run on Loop since the first day of trading, and we run the store, the creative and the retention flows in-house.
That makes it the account where segmentation is tested against a subscription as well as a one-off order. A subscriber and a first-time buyer should not get the same email, and on our own list we find out quickly when they do.
Default install vs built properly
Why Klaviyo accounts get complicated and quiet at the same time
The flow count goes up, nobody can say which flows are live, and the revenue report looks better than the bank balance. It is nearly always the same six things.
| Part of the account | Default install | Built properly |
|---|---|---|
| Naming and folders | Whatever each flow was called when it was built | Decided up front, so forty flows stay legible |
| Shopify data | The default sync | The custom events and properties segmentation needs |
| Catalogue feed | Never checked | Set up, so product blocks show real stock |
| One customer, three flows | Three competing emails | Suppression and priority: one sensible email |
| Attribution | The default that flatters every flow | Settings that match how you count revenue |
| Consent | Unpicked after a complaint | Recorded and honoured from setup |
Run
Ongoing testing and campaign support, reviewed monthly, by the people who built the account.
Knack Snacks
Build, email, paid ads and support
Klaviyo agency UK
The email, the ads and the store, run as one
Knack Snacks sells high-protein chocolate snacks to customers in the UK and the US. We built the store subscription-first on Horizon, and it is a product people buy again and again.
We run their email on Klaviyo, along with the paid ads and the day-to-day support, so the flows and the traffic arriving at the store are one conversation rather than two agencies blaming each other.
Reviews on the Shopify Partner Directory
Merchants, in their own words.
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From start to finish, they were incredibly easy to work with. They understood the brief perfectly and delivered to a very high standard. Communication was excellent throughout, with quick and clear responses to any questions I had.
Tacky And Upsetting Store build or redesign · April 2026
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The things [the team] have put in place and recommended for us have paid immediate dividend. We wish we had come in contact with [them] sooner.
ARTMARTIAL Store build or redesign · April 2026
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I can’t recommend [the team] enough, [they] helped us with everything from product design, supplier communication to website building and SEO. We were able to build a brand off the back of all [their] information and help.
Reveliér Studios Business strategy guidance · April 2026
How we work with you
Account audit
What is live, what is orphaned, what is firing over the top of something else, and what the integration is not sending, written up with what to fix first.
Short engagementAccount rebuild
Structure, naming and event tracking corrected, then the lifecycle flows and segments rebuilt on top, with the suppression logic written down.
Fixed scopeMonthly operation
Ongoing testing and campaign support on an account that already works, reviewed monthly. What Knack Snacks runs with us.
RetainerIs this the right thing to buy from us?
Worth a conversation
- The account has grown flows nobody can map
- One customer gets three emails from three flows
- The revenue report looks better than the bank balance
- Klaviyo was set up by whoever set up the store
Probably not this, yet
- The store is not converting the traffic it already has
- You want a newsletter rather than a revenue channel
- You send from another platform and plan to stay there
Klaviyo email marketing agency
Where this fits
We run Klaviyo on Powerlete and Fittr Nutrition ourselves, so a klaviyo marketing agency recommendation here has already been tested against our own deliverability and our own revenue before it reaches your account.
A klaviyo email marketing agency and an email marketing agency that happens to use Klaviyo are not the same hire, and the difference shows up in the data model rather than in the emails. Klaviyo earns its price on what it knows about a customer from the store, so an account whose custom properties and catalogue feed were never set up properly is a general email tool with a higher invoice. That is the first thing we look at, before any flow.
If you are searching klaviyo uk, you are probably weighing up whether to work with somebody in your own timezone who knows what a UK store has to get right. Consent is the clearest case: how a signup is recorded and how suppression is honoured are decisions made at setup, and they are far cheaper to get right in the account than to unpick after a complaint.
Keep reading
Everything around a Klaviyo account
Around the account
Read first
The brands behind the stores we build and run.
Partners
Tools we have already run on our own stores
The apps around a Shopify store decide as much as the theme does, and choosing between thousands of them is most of the work. We are a Shopify Plus Partner and we integrate the tools that sit around the platform. Every one of them runs on our own two stores before it reaches a client, so the recommendation you get comes from having paid for the thing and lived with it. When a brand already runs a stack that works, we integrate with it rather than rebuilding it to suit us.
How we use them
Straight answers
Klaviyo has its own directory of agencies. Why go outside it?
The directory tells you who is a Klaviyo partner, not who builds the Shopify side of the account too. We do both under one roof, so the flow logic and the store data feeding it come from the same team rather than two vendors handing off a spec between them.
Can you audit the Klaviyo account we already have?
Yes, and it is where most of our Klaviyo work starts. We look at what is live, what is orphaned, what is firing over the top of something else, and what the Shopify integration is not sending, then tell you what to fix first.
Will rebuilding the account lose our list or our history?
No. The rebuild happens inside the account you already have. Structure, naming and event tracking are corrected before any new flow goes on top, so the list and what Klaviyo already knows about each customer stay where they are.
How much does Klaviyo cost?
It is priced on the size of your list, and the plan is only part of the bill. We keep the full answer, with what it actually costs a Shopify store, in our Klaviyo pricing article rather than on this page.
Do you only work with Klaviyo?
Klaviyo is what we run on our own stores and what we set up for most Shopify brands. If you send from something else and are not looking to move, our email marketing service covers the channel without the platform question.
Do you work with US brands as well as UK ones?
Yes. We work from London for brands across the UK and the US, and quote and invoice in either currency.
Tell us what the account does now
Send the store URL and roughly how many flows are live. We reply personally, and if the honest answer is an audit rather than a rebuild, that is the reply you get.
Stores we build and grow
Start a conversation
Talk to the people who would run the account.
Book a call or send a note. We will come back with what the account is missing, what to fix first, and whether it is worth doing yet.
Get in touch