Growth Retainer

The world's #1 post-click optimisation agency.

Q: What makes you different from other CRO agencies?

We work from the offer up. Conversion gets built in three layers: offer, then messaging, then design, and each one only holds when the layer underneath is solid. That’s the Hierarchy of CRO, and it’s backed by eight years of tests across hundreds of Shopify stores. Add Atlas, our in-house AI platform, and you get research-led ideas live faster than most agencies can brief them.

Q: Do you only work with Shopify brands?

Yes. We’re a Shopify Premier Partner, and every store we build and optimise runs on Shopify or Shopify Plus. If you’re on another platform, we can move you across as part of a theme build.

Q: What size brands do you work with?

DTC brands scaling through seven, eight and nine figures, plus startups getting ready to launch on Shopify. Theme builds work at any stage. The growth retainer works best once you have enough traffic to run tests properly

Q: Should I start with a theme build or a growth retainer?

If your store is holding you back, or you’re moving to Shopify, start with a build. If the store is solid but your traffic isn’t converting the way it should, start with the retainer. Plenty of brands do both over time. We’ll tell you which one makes sense on the first call.

Q: How much of my team’s time will this take?

Very little. After onboarding, we run research, design, development and testing on our side, and you sign off the big decisions. Day to day, we talk over a shared Slack channel, so questions get answered without booking a meeting, and every sprint you get an update on what’s live, what’s being tested and what we’ve learned

Q: How does Atlas AI fit into the work?

Atlas plugs into your marketing stack to spot trends and suggest tests, gets landing pages live in hours, and runs dev agents trained on our own coding standards. Our team still sets the strategy and signs off every piece of work. Atlas handles the speed, and the time it saves goes into your next test.

Q: How soon will I see results?

For theme builds, from launch day, and we track performance against your old store. On a retainer, how fast results come in depends on your traffic. More visitors means each test reaches a reliable result sooner, so higher-traffic stores see answers in weeks, and smaller stores need longer per test. We’ll give you a realistic timeline on the first call, based on your numbers. Across our winning tests, the average conversion uplift is 15.6%.

We run everything that happens after the click for high-growth Shopify brands. CRO, landing pages and store management, in one team, powered by Atlas AI.

Book a call

£1 billion+£1 billion+

generated by our stores

3D money gun firing That Works branded notes

+ many more

One engagement

We handle everything, in one plan.

No more separate design, dev and CRO agencies working in silos. No more “4 A/B tests a month” retainers. We take charge of your entire post-click programme and keep it moving.

Shopify store managed under the That Works growth retainer

Full Funnel Optimisation

Continuous CRO across your offer, website and funnels. Our strategists drive your post-click growth, our team delivers the work and results.

Continuous A/B testing

In-depth research & reporting

Ad-matched landing pages

No part of the funnel ignored

Landing page built under the That Works growth retainer

Entire Store Management

The same team that optimises your store runs the day to day too. No change from a designer or developer undermines your growth.

Day-to-day requests

Full design and dev team

Multi-store & Language skills

Shopify Premiere Partners

How we optimise

The Hierarchy of post-click optimsiation.

Most CRO agencies spend time on silly UX changes and small tweaks. We start at the foundation. Your Offer, your messaging and positioning, and UX just ties it together. Great UX can’t save a weak offer, so we pull the levers that change your P&L before we polish the page.

The foundation

Offer

Price, product, bundles and subscriptions. The biggest lever in your business. A mediocre site with a great offer beats a beautiful site with a weak one.

The multiplier

Messaging

Positioning, personas and proof, matched to the ad that brought them in. It turns a good offer into the right reason to buy for each customer.

The polish

UX

Navigation, buy box, CTAs and checkout. It amplifies what’s already working, once the offer and message are solid.

The foundation

Offer

Price, product, bundles and subscriptions. The biggest lever in your business. A mediocre site with a great offer beats a beautiful site with a weak one.

The multiplier

Messaging

Positioning, personas and proof, matched to the ad that brought them in. It turns a good offer into the right reason to buy for each customer.

The polish

UX

Navigation, buy box, CTAs and checkout. It amplifies what’s already working, once the offer and message are solid.

The foundation

Offer

Price, product, bundles and subscriptions. The biggest lever in your business. A mediocre site with a great offer beats a beautiful site with a weak one.

The multiplier

Messaging

Positioning, personas and proof, matched to the ad that brought them in. It turns a good offer into the right reason to buy for each customer.

The polish

UX

Navigation, buy box, CTAs and checkout. It amplifies what’s already working, once the offer and message are solid.

Two sides of CRO

There are two sides to CRO. We do both.

One side of CRO is reading the data. The other is marketing applied to your website. AI now handles the first in minutes. The second still takes people who understand why customers buy.

Data-led CRO

AI reads your heatmaps, surveys and analytics in minutes, spotting drop-offs and fixes that used to take an analyst days. The obvious fixes get shipped fast, and our team’s time goes where it matters most.

Shopify page redesigned using CRO research

Creative CRO

Data won’t tell you to turn a PDP into a quiz, or build a separate funnel for a new audience. New offers, angles and landing pages come from understanding your customer and consumer psychology. That’s where the P&L-changing wins are.

Meet Atlas AI®

The first CRO agency built like
an AI SaaS company

The first CRO agency built like an AI SaaS company

We’ve invested six figures into AI to build the most advanced CRO agency, but we’re not an AI slop factory. It makes our team faster and our decisions sharper, so you get better results for every pound you spend.

We’ve invested six figures into AI to build the most advanced CRO agency in the world, but we’re not an AI slop factory. It makes our team faster and our decisions sharper, so you get better results for every pound you spend.

Atlas Intelligence

Most CRO looks at your website in isolation. We build a data pipeline joining Shopify, Meta, Google and your retention platforms, so we can spot what drives conversions and test smarter.

That’s Quick

Our bespoke workflow tool, connected to your Shopify and brand guidelines. Landing pages, tests, quizzes and site changes ship in a fraction of the time. AI speed, human touch.

Client Portal

We’ll always be on Slack, because you’re working with real people. But every test idea and live report lives in your portal, along with site speed monitoring, bug alerts and more.

AI-assisted design review of a Shopify page

AI-assisted, human-led

AI where it helps, humans where it matters. We deliver faster than ever, with strict human oversight on everything. We care too much about the craft and results to cut corners.

Atlas Intelligence

Most CRO looks at your website in isolation. We build a data pipeline joining Shopify, Meta, Google and your retention platforms, so we can spot what drives conversions and test smarter.

That’s Quick

Our bespoke all-in-one workflow tool, connected to your Shopify and brand guidelines. Landing pages, tests, quizzes and site changes ship in a fraction of the time. AI speed, human touch.

Client Portal

We’ll always be on Slack, because you’re working with real people. But every test idea and live report lives in your portal, along with site speed monitoring, bug alerts and more.

AI-assisted, human-led

AI where it helps, humans where it matters. We deliver faster than ever, with strict human oversight on everything. We care too much about the craft and results to cut corners.

Atlas Intelligence

Most CRO looks at your website in isolation. We build a data pipeline joining Shopify, Meta, Google and your retention platforms, so we can spot what drives conversions and test smarter.

That’s Quick

Our bespoke workflow tool, connected to your Shopify and brand guidelines. Landing pages, tests, quizzes and site changes ship in a fraction of the time. AI speed, human touch.

Client Portal

We’ll always be on Slack, because you’re working with real people. But every test idea and live report lives in your portal, along with site speed monitoring, bug alerts and more.

AI-assisted, human-led

AI where it helps, humans where it matters. We deliver faster than ever, with strict human oversight on everything. We care too much about the craft and results to cut corners.

Atlas Intelligence

Most CRO looks at your website in isolation. We build a data pipeline joining Shopify, Meta, Google and your retention platforms, so we can spot what drives conversions and test smarter.

That’s Quick

Our bespoke all-in-one workflow tool, connected to your Shopify and brand guidelines. Landing pages, tests, quizzes and site changes ship in a fraction of the time. AI speed, human touch.

Client Portal

We’ll always be on Slack, because you’re working with real people. But every test idea and live report lives in your portal, along with site speed monitoring, bug alerts and more.

AI-assisted, human-led

AI where it helps, humans where it matters. We deliver faster than ever, with strict human oversight on everything. We care too much about the craft and results to cut corners.

Atlas Intelligence

Most CRO looks at your website in isolation. We build a data pipeline joining Shopify, Meta, Google and your retention platforms, so we can spot what drives conversions and test smarter.

That’s Quick

Our bespoke all-in-one workflow tool, connected to your Shopify and brand guidelines. Landing pages, tests, quizzes and site changes ship in a fraction of the time. AI speed, human touch.

Client Portal

We’ll always be on Slack, because you’re working with real people. But every test idea and live report lives in your portal, along with site speed monitoring, bug alerts and more.

AI-assisted, human-led

AI where it helps, humans where it matters. We deliver faster than ever, with strict human oversight on everything. We care too much about the craft and results to cut corners.

Atlas Intelligence

Most CRO looks at your website in isolation. We build a data pipeline joining Shopify, Meta, Google and your retention platforms, so we can spot what drives conversions and test smarter.

That’s Quick

Our bespoke all-in-one workflow tool, connected to your Shopify and brand guidelines. Landing pages, tests, quizzes and site changes ship in a fraction of the time. AI speed, human touch.

Client Portal

We’ll always be on Slack, because you’re working with real people. But every test idea and live report lives in your portal, along with site speed monitoring, bug alerts and more.

AI-assisted, human-led

AI where it helps, humans where it matters. We deliver faster than ever, with strict human oversight on everything. We care too much about the craft and results to cut corners.

Start where you are

We also rebuild entire stores.

Start with a CRO Theme Build or Shopify migration, then let us handle the optimisation once you’re live.

Explore Theme Builds

Mobile Shopify theme designed by That Works

How it works

While you’re running the business, our team is researching, building and launching your next test. Every result feeds straight into the next round, so your store keeps getting better week after week. The momentum never stops.

Analyse & plan

Our team constantly digs into your data, customers and past tests to build a testing roadmap ranked by impact.

Build & launch

Your dedicated team designs, develops and launches tests fast, while still handling day-to-day store requests.

Learn & repeat

Every test, win or lose, makes the next round stronger. That’s how the gains compound.

What to expect

Everything you need to grow, in one team.

From the first audit to the hundredth test, one team handles everything. Strategy, design, development and data all sit under one roof, so nothing gets lost between agencies and every test ships faster.

Comprehensive Audits & Roadmaps

We audit your data, customers and full funnel, but our strategists aren’t just data nerds. They’re marketers, so your testing roadmap is built around why people buy, not just where they drop off.

Dedicated That Works team communicating in Slack

Dedicated Team & Fast Communication

You get your own dedicated strategists, account manager, designer and developers who know your brand inside out. We’re in your Slack channel, so questions get answered fast and work never sits waiting.

Landing Pages, Quiz Funnels & More

We don’t just do UX changes. We test offers, messaging and pricing, and build landing pages, quiz funnels and advertorials to match your ads. If it makes you more money, we’ll build it and test it.

Mouthwatering Design

Good CRO shouldn’t make your site look worse. Our designers are some of the best in ecommerce, building every page and test to look premium and on-brand, so your store converts better and looks better.

Logos of 8 and 9 figure brands That Works has worked with

Pattern Recognition from a Billion in Revenue

Over a billion in revenue has gone through stores we’ve built and optimised. We’ve learned what moves conversion across all of them, so your tests start from proven patterns, not guesswork.

Comprehensive Audits & Testing Roadmaps

We audit your data, customers and full funnel, but our strategists aren’t just data nerds. They’re marketers, so your testing roadmap is built around why people buy, not just where they drop off.

Your Own Dedicated Team & Fast Communication

Landing Pages, Quiz Funnels & More

Mouthwatering Design

Pattern Recognition from a Billion in Revenue

Over a billion in revenue has gone through stores we’ve built and optimised. We’ve learned what moves conversion across all of them, so your tests start from proven patterns, not guesswork.

Comprehensive Audits & Roadmaps

We audit your data, customers and full funnel, but our strategists aren’t just data nerds. They’re marketers, so your testing roadmap is built around why people buy, not just where they drop off.

Dedicated Team & Fast Communication

Landing Pages, Quiz Funnels & More

Mouthwatering Design

Pattern Recognition from a Billion in Revenue

Over a billion in revenue has gone through stores we’ve built and optimised. We’ve learned what moves conversion across all of them, so your tests start from proven patterns, not guesswork.

Comprehensive Audits & Testing Roadmaps

We audit your data, customers and full funnel, but our strategists aren’t just data nerds. They’re marketers, so your testing roadmap is built around why people buy, not just where they drop off.

Your Own Dedicated Team & Fast Communication

Landing Pages, Quiz Funnels & More

Mouthwatering Design

Pattern Recognition from a Billion in Revenue

Over a billion in revenue has gone through stores we’ve built and optimised. We’ve learned what moves conversion across all of them, so your tests start from proven patterns, not guesswork.

Comprehensive Audits & Testing Roadmaps

We audit your data, customers and full funnel, but our strategists aren’t just data nerds. They’re marketers, so your testing roadmap is built around why people buy, not just where they drop off.

Your Own Dedicated Team & Fast Communication

Landing Pages, Quiz Funnels & More

Mouthwatering Design

Comprehensive Audits & Testing Roadmaps

We audit your data, customers and full funnel, but our strategists aren’t just data nerds. They’re marketers, so your testing roadmap is built around why people buy, not just where they drop off.

Your Own Dedicated Team & Fast Communication

Landing Pages, Quiz Funnels & More

Mouthwatering Design

Success stories

The stores behind the numbers.

Over a billion in revenue has gone through stores we’ve built and optimised. Here’s how some of them got there.

A Full Store Rebuild That Grew BetterYou’s Revenue 70% And Conversion 51%

BetterYou Shopify store built by That Works

From £20M To £80M, With A Store That Kept Pace At Every Stage

Sofa Club Shopify store built by That Works

Concept, Launch & Scale for Emily English’s Epetome.

Epetome Shopify store built by That Works

Helping Magic AI Expand To The US And Grow 342%

Magic AI Shopify store built by That Works

From Launch To One Of The UK’s Fastest Growing Brands

Cleens Shopify store built by That Works

100% More Revenue And 58% Higher Conversion, Without More Traffic

Optimise your conversion rate &
make more profit. Let’s chat.

Book a free call and we’ll walk through where your store is leaving money on the table after the click, and how our team would fix it.

&

You

Book a call

[email protected]

Optimise your conversion rate &
make more profit. Let’s chat.

Book a free call and we’ll walk through where your store is leaving money on the table after the click, and how our team would fix it.

&

You

Book a call

[email protected]

Optimise your conversion rate &
make more profit. Let’s chat.

Book a free call and we’ll walk through where your store is leaving money on the table after the click, and how our team would fix it.

&

You

Book a call

[email protected]

Optimise your conversion rate & make more profit.
Let’s chat.

Book a free call and we’ll walk through where your store is leaving money on the table after the click, and how our team would fix it.

&

You

Book a call

[email protected]

Optimise your conversion rate & make more profit.
Let’s chat.

Book a free call and we’ll walk through where your store is leaving money on the table after the click, and how our team would fix it.

&

You

Book a call

[email protected]

FAQ

Got questions?
We’ve got answers.

General

CRO

Theme Builds

What makes you different from other CRO agencies?

Do you only work with Shopify brands?

What size brands do you work with?

Should I start with a theme build or a growth retainer?

How much of my team’s time will this take?

How does Atlas AI fit into the work?

How soon will I see results?

Services

Book a call

Services

Conversion Rate Optimisation

Shopify Theme Builds

Other

Careers

6 open positions

Case Studies

Our Team

Contact

Services

Conversion Rate Optimisation

Shopify Theme Builds

Other

Careers

6 open positions

Case Studies

Our Team

Contact

Services

Conversion Rate Optimisation

Shopify Theme Builds

The Shopify agency that
makes you more money.

Growth Retainer

The world's #1 post-click optimisation agency.