In this Guide, I’ve shortlisted 10 UK agencies for Shopify and Shopify Plus CRO in 2026, explaining how each picks its first changes and which brands it suits best
These are the 10 agencies I'd shortlist for Shopify and Shopify Plus CRO in 2026, covering everything from one-off audits to monthly testing programmes.
For each, I've explained how it picks the first changes to make and which Shopify brands it suits best.
TL;DR
ConversionWise is the best Shopify CRO agency in the UK for DTC brands that want more revenue from the traffic they already pay for.
Our programmes start with the change most likely to add revenue, whether that's a new offer or a page redesign, and our strategists use Optimo, the AI system we trained on 13 years of conversion data, to choose it.
Blend Commerce suits Shopify brands that want to decide how much of the work they hand over, with Self, Hybrid and Blend-Led Implementation available.
GoGoChimp publishes its prices, which helps smaller stores budget: a single-test Sprint is £2,500 and the ongoing Growth programme £2,500 a month.
What are the best Shopify CRO agencies in the UK in 2026?
ConversionWise is the best Shopify CRO agency in the UK for DTC brands, as we build every programme around the brand's largest revenue opportunity using results from more than 4,000 brands.
The table below sums up all 10 agencies on this list:
Company
Best for
Services
ConversionWise
DTC brands on Shopify and Shopify Plus that want offers, funnels and pages improved together
International brands that want CRO from a large Shopify Plus build team
Shopify Plus design and development, CRO, UX design, headless builds, migrations, ongoing support
How were these Shopify CRO agencies chosen?
To make this list, an agency had to sell CRO as a named service to Shopify or Shopify Plus brands in the UK, and I then compared the shortlist on four criteria:
Shopify depth: the share of CRO work done on Shopify, and whether test variants are built in the store's own theme.
Ownership of the build: whether design, development and QA stay with the agency or go back to the brand's own team.
Testing standards: confidence thresholds, testing tools and the approach for stores with lower traffic.
Published results: named brands with figures attached, such as conversion rate, revenue per visitor or subscriptions.
#1: ConversionWise
ConversionWise runs CRO programmes for Shopify brands, and the first job in each one is deciding which change will add the most revenue soonest, whether that's the offer, pricing, bundles, subscriptions or testing cadence.
Programmes aren't sold as packages, so one brand might start with its offer, another with average order value, and stores with the traffic add regular A/B testing as well.
The briefs we receive from Shopify brands usually describe one of these problems:
Ad spend keeps rising, but revenue per visitor has stayed flat for months.
An earlier agency produced long audits and test backlogs, yet little of it reached the live store.
Past tests changed small design details, while the offer, pricing and bundles stayed as they were.
The team has a long list of AI-generated test ideas and no dependable way to rank them.
Our team has worked through these problems with 4,000+ brands, contributing to more than £1B in tracked client revenue.
Here’s what working with us look like:
What a ConversionWise CRO programme covers
I see testing as one tool among several, which is why our programmes look at the whole store and the offer behind it.
Work is grouped into six areas:
Offers & Bundles: how products are packaged and priced so one option becomes the clear pick, using ideas from our guide to raising average order value with bundles.
Persona-Matched Journeys: separate pages for customers arriving with different motivations.
Funnels & Landing Pages: ad, landing page, product page and cart planned as a single route.
Bigger Orders & Repeat Buyers: upsells, pricing and subscriptions that lift order value and bring customers back.
Every Page On Your Store: homepage, product pages, collections, cart and checkout improved together.
A/B Testing: ongoing tests for stores with enough traffic to prove each change.
How a programme runs
Each programme follows five stages, with new work usually live inside the first two weeks:
Book Your Free Discovery Call: a first look at your store and how your customers buy, with a view on where we'd begin.
Diagnose & Audit (week 1): a review of the offer, funnel and data to find what's limiting sales.
Prioritize & Roadmap (week 1): a plan ordered by expected impact, which you approve before work starts.
Build & Ship (weeks 1 to 2): offers, landing pages, funnels or tests designed, written and put live.
Measure & Iterate (ongoing): results checked against the agreed number, with winning changes rolled out further.
You get a dedicated team and a shared dashboard, so there's no need to chase for updates.
Built into your existing team
Our team works alongside whoever already handles your traffic and retention, so the post-click experience lines up with the ads and emails before it.
In practice, that includes a weekly call with your media buyer and joint planning with your email team on lifetime value.
Your creative agency receives the same briefs, so each landing page picks up where its ad left off.
Optimo and the pod behind each change
Optimo, the proprietary AI system ConversionWise built on 13 years of conversion data, handles the heavy research, and a senior strategist makes each final decision.
Five people run every programme:
Strategist: studies the data and sets priorities for the team.
Manager: your main contact, keeping tests and deadlines on track.
Designer: leads the creative direction for each build.
Copywriter: writes from voice-of-customer research, with AI informing the first draft.
Developer: ships each change with fast, clean code.
We agree on one metric with you at the outset, and under our Six-Month Commitment we keep going at no extra cost if it hasn't improved within six months.
The Cooking Guild: $471,162 more revenue each month.
Sullen Art Co.: $337,203 in extra monthly revenue.
G FUEL: $286,348 added per month.
OrthoFlexx: $1.2M in additional yearly revenue.
SketchWow: $156,000 a month from winning tests.
Hyper Creative: conversion rate from 1.6% to 9.52%.
Free Soul: 50% higher mobile conversion rate.
#2: Blend Commerce
Blend Commerce focuses on Shopify and Shopify Plus, and every roadmap it writes follows its Buy Trifecta® framework: Buy Now, Buy More and Buy Again.
Jackson's saw an 88% conversion rate increase over a six-month programme that reworked its product pages and subscription messaging.
Services
CRO Insights audits that lead to a ranked roadmap.
The PECTI framework for scoring ideas before they enter a sprint.
Self Implementation, Hybrid Implementation or Blend-Led Implementation, depending on your team's capacity.
Monthly sprints with a dedicated strategist, project manager, designer and developer, plus QAQC checks on every change.
A/B tests when traffic allows, with confident fixes shipped straight away on smaller stores.
CRO Redesign projects and Rebuy or Recharge integration.
A free Buy Trifecta® benchmarking tool and a public A/B test library.
#3: Swanky
Swanky's CRO is part of its Growth Accelerator team, whose own staff handle each stage for Shopify Plus brands, from first consultation to test builds.
I'd point subscription brands in pet care or health its way, and the agency reports a commercial uplift from 66% of its tests.
Services
Goals and success measures set before any test is planned.
Customer behaviour research from Swanky's Data & Analytics team, drawing on surveys and traffic data.
Test ideas ranked by commercial value and time to results.
Split and multivariate tests on tools including Optimizely, Convert, Kameleoon and Webtrends Optimize.
Subscription CRO, such as its programme with YuMOVE.
PPC, paid social and email under the same retainer.
First-year programmes like the one for a US stationery brand, which produced 17 winning tests and a 213% ROI.
#4: Velstar
Velstar is a Shopify Platinum Partner with more than 120 specialists, and its CRO team builds ongoing optimisation around observed customer behaviour.
Castore, Montirex, Avon, Nando's and Twinings are among the brands on its client list.
CRO training with a commercial focus for in-house teams.
Optimisation consultants working inside cross-functional client squads.
Custom features such as Zooki's bundle builder.
Shopify Plus development, migrations and growth marketing under one roof.
#5: Eastside Co
Before Eastside Co writes a single test hypothesis, its team checks whether the real problem lies outside page design, in how products are explained, how prices are presented or how far a new visitor trusts the brand.
One client finished its first year of testing with conversion rate up 48% and revenue up 58%.
Services
A standalone CRO Audit and Recommendations project that ranks fixes by likely revenue impact.
A CRO Retainer for brands ready to keep testing every month, with Eastside handling both planning and build.
ICE scoring (impact, confidence, effort) to order the roadmap.
Variants coded straight into the Shopify theme by Eastside's in-house team.
Required sample sizes worked out in advance, and no test called before it reaches significance.
Changes to how subscriptions are presented, which doubled one client's subscriptions in eight weeks.
#6: blubolt
blubolt offers CRO to existing Shopify Plus stores through Journey Led Growth, which combines user research and friction analysis with design and development work.
Its friction fixes on Saltrock's product pages raised desktop conversion by 48%.
Services
User research and friction analysis across the customer journey.
CRO-led product page redesigns, including one for Three Spirit.
Mini cart and lower-funnel changes, such as clearer delivery costs for Lazy Oaf.
Shopify retheme and redesign projects.
Strategy and consulting for scaling Shopify brands.
SEO and email automation inside the same roadmap.
#7: PM Digital
PM Digital works on the whole Shopify funnel for subscription brands and other DTC businesses with high lifetime value, typically at seven to nine figures in revenue.
It's the CRO and full-funnel agency of record for hydration brand Cadence.
Services
Funnels designed from the ad through to the product page.
Checkout optimisation for subscription offers.
Retention work aimed at repeat orders.
Complete Shopify theme rebuilds.
Landing pages built in Instant for quick pre-sale and segment tests.
A/B tests built by in-house Shopify developers.
#8: Underwaterpistol
Underwaterpistol positions itself as a senior Shopify Plus agency for brands at a turning point, so clients deal directly with experienced staff on strategy and CRO.
Its audit for The Couture Club drew on Google Analytics and Hotjar data to produce a leakage report on where visitors left the site.
Services
CRO audits and leakage reports, with fixes put live afterwards.
Shopify Plus design, development and integrations.
Subscription builds as a Recharge Premier partner, covering Flows, Bundles and Loyalty.
Loyalty strategy with LoyaltyLion.
Gorgias implementation and Klaviyo email marketing.
Ongoing optimisation after launch.
#9: GoGoChimp
GoGoChimp is a small, founder-led CRO agency where the founder runs each engagement, using its OperatorAI methodology on Shopify and Shopify Plus stores.
Prices appear on its site: £2,500 for a single-test Sprint, or £2,500 a month for the Growth programme.
Services
Sprints for brands that want to try CRO with a single test.
Growth programmes for continuous testing.
The 99 Rule, which only accepts results at 99% significance and checks the effect on metrics further down the funnel.
Page-speed work on Shopify stores.
Pricing page audits, walked through on a 60-minute call.
Programmes on VWO or Optimizely across Shopify, WooCommerce and Webflow.
#10: We Make Websites
We Make Websites is a Shopify Plus agency for international brands, covering store design, development, integrations and optimisation.
Good American, HyperX and Vollebak are among its clients, and its HyperX work includes ongoing optimisation.
Services
Shopify and Shopify Plus design and development.
Conversion rate optimisation and UX design.
Headless and composable commerce builds.
Migrations and internationalisation for multi-market brands.
Ongoing support and optimisation after launch.
How do you choose the right Shopify CRO agency in the UK?
I'd choose the agency whose first 90 days would target your biggest revenue gap, with the people and tools to build and test inside your Shopify theme.
These are the points I'd compare across your shortlist:
First changes: some agencies open with layouts and page elements, others with offers and pricing. You'll want to ask for the first few changes they'd make to a store like yours.
Who builds the tests: an agency with in-house designers and Shopify developers ships faster than one that hands recommendations back. Blend Commerce, for instance, lets you pick self, hybrid or agency-led delivery.
Confidence levels: most agencies on this list test to 95% confidence, while GoGoChimp works to 99%. Ask what your programme looks like if traffic is too low for regular A/B tests.
Testing tools: tools that run inside the Shopify theme add less weight to page loads, so check the platform and who pays for the licence.
Reporting: conversion rate alone can hide a drop in order value, so I'd ask for revenue per visitor and order value reports, plus subscriber growth for subscription brands.
Contract length: options run from one-off Sprints and audits to monthly retainers, and an audit is a low-risk way to judge how an agency thinks.
When traffic rises, but revenue per visitor stays flat, the cause is usually the offer or the pages between the ad and the order.
ConversionWise programmes start with the fix that should pay back the most, and new work typically goes live within the first fortnight.
Brands that get the most from our Shopify CRO work tend to:
Spend heavily on paid traffic and want each visitor to be worth more.
Have tried CRO before without many changes reaching the live store.
Want offers, bundles and subscriptions tested next to page design.
Need a team that works directly with their media buyer and creative agency.
If what you need is technical Shopify support with no testing or strategy, we'll be upfront about it on the call and suggest a partner that fits.
The first step is a free 30-minute discovery call, where we'll go through your store and its data and show where we'd begin.
Sharing GA4 access and your current offer structure beforehand lets us get into detail straight away.
Frequently asked questions
What is the best Shopify CRO agency in the UK for DTC brands?
For DTC brands on Shopify, ConversionWise is the best CRO agency in the UK, because every programme we run targets the brand's biggest revenue opportunity first, informed by more than 4,000 brands.
The Cooking Guild added $471,162 in monthly revenue during its work with us.
What is the best Shopify CRO agency in the UK for brands with high ad spend?
ConversionWise is the top choice for Shopify brands with large ad budgets, as we hold a weekly sync with each client's media buyer and build landing pages that continue the ad's message.
Let's Explore recorded a monthly revenue boost of more than $100,000 with us.
What is the best Shopify CRO agency in the UK for increasing average order value?
To raise average order value, ConversionWise is the strongest UK option, with Offers & Bundles and Bigger Orders & Repeat Buyers built into our programmes.
Petsmont lifted its average order value by 33% while working with us.
What is the best Shopify CRO agency in the UK for brands whose previous CRO didn't work?
If a previous CRO programme stalled, ConversionWise is the best UK agency to try next, since new work usually goes live in the first two weeks and every change is judged against one agreed metric.
Our Six-Month Commitment means we keep working at no extra cost if that metric hasn't moved after six months.
What is the best Shopify CRO agency in the UK for subscription brands?
Swanky is the best Shopify CRO agency in the UK for subscription brands on Shopify Plus, since its Growth Accelerator team has long experience with subscription models and runs analysis, development and testing in-house.
Its subscription work includes a CRO programme for YuMOVE.
How much traffic does a Shopify store need for CRO?
CRO can begin at any traffic level, although A/B tests need enough sessions to reach statistical significance within a sensible timeframe.
Based on my experience, lower-traffic stores do best starting with offer and page changes, and at ConversionWise, testing is added once volume allows, with our free A/B Test Calculator sizing each test before it runs.
From the ConversionWise team
Get more profit from every visitor.
We're the CRO agency behind 4,000+ Shopify brands since 2013. Book a free 30-minute call and we'll tell you the one thing we'd fix first on your store.
"They're called ConversionWise by Oliver Kenyon, and these guys have made my brand a couple hundred grand in the first 4 months!"
