10 Best Email Marketing Agencies For Shopify Retailers In The UK (2026)

This guide covers ten email marketing agencies working with Shopify retailers in the UK: what each one actually does, and the kind of brand each tends to suit best, so your shortlist takes a little less digging to put together.

TL;DR

• Underground Ecom is the strongest email marketing agency for UK Shopify and DTC brands. We run email as a core retention channel inside one Klaviyo-led programme that also covers SMS and WhatsApp, delivered end to end by a fully allocated team.
• Swanky is a solid pick for Shopify and Shopify Plus brands that want their Klaviyo email and SMS handled by a team that also knows the store build side of things.
• Enchant suits established retail and DTC brands whose email lives on more than one platform, anywhere from Klaviyo to HubSpot or Salesforce Marketing Cloud.

What are the best email marketing agencies for Shopify retailers in the UK in 2026?

The best email marketing agencies for Shopify retailers in the UK are Underground Ecom, Swanky, and Enchant.

Here’s the full shortlist of the 10 best vendors:

#1: Underground Ecom

Location: 103 Farringdon Road, London.

Underground Ecom offers the best email marketing agency for Shopify retailers in the UK, as we treat email as a serious revenue channel, not a send-and-hope newsletter.

We start by auditing your Klaviyo account against your commercial goals and the wider competitive picture, then build a prioritised roadmap where every action ties back to projected revenue.

From there, the work moves through four stages:

• Strategy and lifecycle planning.
• Creative and content.
• Campaign and journey execution.
• Reporting and optimisation.

Most agencies add email onto a wider service menu. We don’t. 

Retention is all we do, and it shows in how email, SMS and WhatsApp get sequenced together so no single customer ends up spammed across every channel at once.

A team that owns the whole programme, not a single account manager

Every brand gets a fully allocated and multi-disciplinary team.

A typical setup pairs a CRM Director as operational owner with a CRM Manager driving day-to-day execution, dedicated designers and copywriters on the creative, and a senior layer of Client Director, Head of CRM and Strategy Director handling roadmaps, segmentation frameworks and weekly alignment.

Underground Insights

Underground Insights is our proprietary benchmarking and reporting tool, which is free for all of our active clients.

Drawing on a dataset of over 500 brands, it shows things native Klaviyo dashboards can’t: custom attribution, vertical-specific benchmarks, lifecycle revenue mapping, and a clear read on where money is leaking out of the funnel.

We use it during the audit to size the opportunity, throughout the engagement to track progress against benchmarks, and in quarterly reviews to surface fresh things worth testing.

It will also flag the team within the week if flow revenue dips below the historical baseline.

Services

• Lifecycle strategy, customer journey mapping and a prioritised roadmap tied to projected revenue.
• Segmentation frameworks and audience modelling built on Klaviyo customer data.
• Automated flow strategy and build across welcome, abandonment, browse abandonment, post-purchase, cross-sell, upsell, winback and sunset journeys.
• Campaign content and segmentation, including build, quality control, send and reporting.
• Email copywriting, template and modular design.
• A/B testing and split testing across copy, timing, audience and offer.
• List cleaning, list hygiene and deliverability auditing.
• Popups, lead capture and zero-party data collection.
• SMS and WhatsApp, sequenced with email so nothing competes for the same customer.
• Loyalty and direct mail integration.
• Klaviyo migrations from platforms such as Mailchimp, Dotdigital, Bloomreach, Attentive, HubSpot, Omnisend and Drip.
• Cohort analysis and predictive lifecycle work.
• Reporting against revenue and engagement, benchmarked through Underground Insights.

Brands we work with

Brands working with Underground Ecom across the retention stack include AG1, Huda Beauty, Virgin, Wild, Surreal, Spacegoods, Oh Polly, Chilly’s, Osprey, Britvic and SeoulBox.

Our wider client base spans over 500 brands across email, SMS and WhatsApp, from early-stage challengers through to global, multi-market businesses.

In terms of our industry recognition, we were named Klaviyo Agency Partner of the Year EMEA 2025, and we are recognised as number one across ecommerce strategy and innovation, email marketing performance, creativity and content, and impact on the Klaviyo ecosystem.

In 2024, we generated more than $240 million in trackable revenue for clients, and I believe that our NPS of 9.5 reflects how the partnership actually feels day to day.

#2: Swanky

Location: 19 Southernhay West, Exeter.

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Swanky is a Shopify and Shopify Plus agency, so its in-house Klaviyo team works shoulder to shoulder with the people building and tuning the store itself.

Campaigns and automated flows are handled by the same specialists, and the agency has clocked up plenty of mileage in beauty, food and drink, wellness and baby brands.

Services

• Campaign strategy and build across email and SMS, from concept through to send.
• Welcome, abandoned checkout and post-purchase flows, plus more advanced automations.
• A full SMS programme, covering setup, list building, automations and broadcasts.
• Subscriber data put to work for personalised messaging.
• Account setup and clean-up, deep audits and routine health checks.
• Copy that earns the open, from subject lines through to calls to action.
• Templates designed to be accessible and to read well in dark mode.
• Continuous A/B testing.
• Integrations for reviews, loyalty and retargeting elsewhere.
• KPI-led reporting.
• Black Friday and Cyber Monday planning for the peak window.
• Bespoke email builds developed to fit a Shopify store.

#3: Enchant

Location: First Floor, 85 Great Portland St, London W1W 7LT.

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Enchant is platform-agnostic, which is handy if your email lives somewhere other than Klaviyo.

The team is just as at home in HubSpot, Salesforce Marketing Cloud, Braze or Iterable, and its remit stretches well past the inbox into SMS, push, in-browser and WhatsApp.

For an established retail or DTC brand whose email is one strand of a bigger messaging operation, that range is the appeal.

Services

• Email audits, plus a roadmap to act on them.
• Flow and automation builds.
• List growth and lead capture.
• Reusable design systems and templates.
• Deliverability and inbox placement.
• Copywriting and ongoing campaign management.
• Consulting and hands-on training for in-house teams.
• Coded HTML email when a brand needs it.
• Help choosing an email platform, and moving onto it.
• Messaging beyond email, including SMS, push, in-browser and WhatsApp.
• Wider CRM strategy and loyalty schemes.
• Eye-tracking studies that feed back into design.

#4: Charle

Location: London, UK, with a presence in Manchester and New York.

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Charle handles retention under a banner it calls Charle Retain, pulling together email, SMS, loyalty and subscriptions on Klaviyo.

The same agency also designs and builds Shopify and Shopify Plus stores through a separate service, so the email programme and the storefront can be kept in step.

Services

• A retention plan mapped to the store and its customers.
• Klaviyo campaigns and automated flows.
• Segmentation driven by behaviour, purchase history, engagement and predictive signals.
• Core sequences for welcome, cart recovery and post-purchase.
• SMS woven in with email.
• Loyalty and subscription tools connected through the wider stack.
• Design and on-brand creative.
• Copywriting for subject lines, body and calls to action.
• Sign-up forms and popups tuned for list growth.
• Testing and reporting on what’s actually working.

#5: Jarrang

Location: White Collar Factory, Old Street Yard, London.

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Jarrang has been doing email and CRM for a long time, with a client base that leans towards retail, hospitality and bigger consumer brands.

Where it really earns its reputation is the technical end, deliverability, data and the unglamorous plumbing that keeps a programme healthy, and it knows its way around enterprise platforms like Salesforce Marketing Cloud, Mapp and Campaign Monitor.

Services

• Strategy work, from account reviews and audits through to campaign planning.
• Design, build, content, testing and quality control on every send.
• Tracking down and fixing deliverability problems.
• Data, segmentation and automation across the audience.
• Connecting up the platforms a brand already uses.
• Analysis and recommendations you can act on.
• Longer-term programme development and maturity planning.
• Training so in-house teams can hold their own on the platform.

#6: Aware Digital

Location: Unit 3, Riverside 2, Campbell Road, Stoke on Trent.

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Aware Digital works out of the Midlands and keeps everyone, developers and marketers alike, in-house in the UK.

It pairs Klaviyo email with ecommerce builds and has genuine depth on Magento and Adobe Commerce as well as Shopify, which pays off when your automations need to talk cleanly to the store and the rest of the stack.

Services

• A clear-eyed audit of where the email stands today.
• Moving a brand off its old email platform and onto a better fit.
• Day-to-day campaign management.
• Automations and workflows built to bring in sales.
• A/B testing as a habit, not a one-off.
• Growing and segmenting the list.
• Branded templates designed to convert.
• An email strategy shaped around the business.
• Reporting that benchmarks performance against the wider market.

#7: B2 Agency

Location: 2nd Floor, Equity House, Boar Lane, Leeds, LS1 5EN.


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B2 runs email for Shopify brands selling to consumers and businesses alike, and it’s ‘’fluent’’ across a spread of platforms, native Shopify email, Dotdigital, Mailchimp and Klaviyo among them.

Email gets planned alongside the rest of a brand’s Shopify and digital work, so the messaging stays coherent end-to-end.

Services

• One-off campaigns backed by segmentation and split testing.
• Hooking email platforms up to Shopify, whether that’s Klaviyo, Dotdigital or Mailchimp.
• Automated journeys tailored to where someone is in their buying journey.
• Using an email platform as a full customer data platform to map engagement.
• SMS alongside email.
• Onsite popups and sign-up forms to capture data.
• Campaigns that prompt customer reviews.
• Template design with a built-in testing plan.
• Reactive content that jumps on a relevant news moment.

#8: Pod Digital

Location: Office 6, Elizabethan House, Lutterworth, Leicestershire, LE17 4NJ.

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Pod Digital folds email into a broader digital relationship, handled by a dedicated email team that works across Klaviyo, Mailchimp, Dotdigital and HubSpot.

The channel gets planned alongside SEO, paid search, paid social, web and data, so the brand says the same thing wherever a customer runs into it.

Services

• Segmented campaigns that keep an audience warm without overdoing it.
• Acquisition and win-back flows, including cart recovery and re-engagement.
• Live segmentation that the rest of the marketing can draw on.
• Strategy grounded in research into the business, its market and its buyers.
• Templates and copy from in-house designers and writers.
• Monthly planning and a content calendar that keeps ticking.
• Reporting each month, with clear focus areas for the next one.

#9: Page Creative

Location: Leigh-on-Sea, Essex, UK, with a London presence.

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Page Creative’s email work is run right alongside its web design, branding, print and packaging teams, with strategists, designers and copywriters building each campaign together and a real eye for how an email looks and reads.

It supports Klaviyo, Mailchimp, HubSpot and Shopify. If craft and genuinely on-brand creative matter to your brand, Page Creative is in its element.

Services

• Planning and strategy pinned to each campaign’s goal.
• Copywriting and design produced together.
• Testing, QA and well-timed scheduling before anything goes out.
• Segmentation and personalisation of the audience.
• Automated email flows.
• Tracking of opens, clicks and conversions, written up in plain analytics reports.

#10: Wonderwork

Location: London, UK.

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Wonderwork builds email and CRM into a wider performance and content programme, with a keen eye on how leads actually move through the funnel.

Campaigns are wired into the brand’s CRM and automation tools so the messaging and the numbers stay joined up, and the team also covers paid media, content, social and web, Shopify setups included.

The pitch makes sense for brands that want email plugged into one connected system, with attribution they can trust across channels.

Services

• Email tied into the CRM so marketing and sales stay in sync.
• Audience research and segmentation, from cart abandoners to buyers in different markets.
• On-brand design matched to the copy.
• Storytelling and content shaped around the brand’s voice.
• A reporting dashboard built around the goals that matter, reviewed regularly.
• Different strategies for different customer generations.
• Onboarding that opens with an audit, goal-setting and tracking.

How to choose the best email marketing agency for your Shopify brand

Once three or four credible names are on your shortlist, the decision usually comes down to a handful of less glamorous questions:

• How does email join up with the rest of your retention? Email is at its best when it’s sequenced with SMS, WhatsApp, loyalty and the store itself. Ask how the agency ties those channels together, because running email off on its own is where over-messaging and customer fatigue start to creep in.
• Does their platform strength match your stack? If you’re on Shopify and Klaviyo, a team that goes deep on Klaviyo is a real advantage. If you run something else, say Salesforce Marketing Cloud, HubSpot or Dotdigital, check the agency genuinely knows it and doesn’t treat it as a sideline.
• Specialist or full-service, and which suits your stage? A dedicated email and retention specialist will go deeper on the channel. A full-service agency keeps email next to SEO, paid media and web. Neither is automatically better. The right shape depends on your team, your budget and how much you want one partner to carry.
• Who actually does the work each week? Some agencies pitch senior people and then deliver with juniors. Ask who builds the flows, who writes the copy, who joins your weekly call, and how experienced they are. Getting names up front saves a lot of friction later.
• Can they do both creative and deliverability? A beautiful email that lands in the spam folder helps nobody, and a perfectly delivered email that reads like wallpaper won’t convert. A capable partner covers both, and can talk you through consent capture, authentication, list hygiene, GDPR and PECR for UK lists without being prompted.

What services do email marketing agencies typically offer?

Most UK email marketing agencies offer a stack that looks broadly similar at the top level, with the depth varying once you look past the website copy. A typical scope covers:

• Strategy and lifecycle planning that places email in the customer journey alongside SMS, WhatsApp and loyalty.
• Account setup and platform work, most often on Klaviyo, with Mailchimp, Dotdigital, HubSpot or Salesforce Marketing Cloud also common.
• List growth through popups, sign-up forms, checkout capture and zero-party data flows.
• Automated lifecycle journeys covering welcome, abandoned cart, browse abandonment, post-purchase, winback, replenishment, back-in-stock and VIP.
• Campaign planning around launches, sales events and peak trading windows like Black Friday.
• Segmentation and personalisation tied to customer data in Klaviyo, Shopify or another CRM.
• Email design and template systems, plus copywriting written for the brand voice.
• A/B testing across subject lines, content, send timing and audience.
• Deliverability and compliance work, covering authentication, list hygiene, sender reputation, GDPR and PECR for UK lists.
• Platform migrations between email tools.
• Reporting against revenue and engagement, attributed back into the wider retention programme.

Choose Underground Ecom as your Shopify email marketing partner

The Shopify brands pulling real revenue out of email in 2026 are the ones treating it as a core retention channel with its own strategy, its own KPIs and its own creative, plugged into a wider Klaviyo programme that also covers SMS and WhatsApp.

That is exactly the shape of the programme Underground Ecom is built to run.

We bring a proprietary benchmarking dataset of over 500 DTC brands to work to size the opportunity for your brand, build the programme to convert, and report against revenue, not vanity metrics.

If a partnership of that shape lines up with what you need, the easiest next step is booking a discovery call with our team.

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