London has one of the deepest pools of email and CRM talent in Europe. Retail, hospitality, financial services and direct-to-consumer brands all run serious lifecycle programmes from the capital, and the email marketing agencies in London that serve them range from Klaviyo specialists working with Shopify brands to CRM creative studios that design and code email for household names. The hard part for a buyer is telling a genuine email specialist apart from a generalist agency that lists email as one of a dozen services.
To build this list we checked every firm against its own website. Each one shows a London office or London base on its own site, offers email or CRM as a core service rather than an add-on, and publishes verifiable work such as named clients, case studies or platform partner status. Nobody paid to be included, and the order reflects our judgement of strength and fit for London buyers. For more providers across the capital, see our London services hub.
London Email Marketing Agencies At A Glance
Agency
London Base
Best For
Core Services
Enchant Agency
Great Portland Street, W1W
Brands that want a senior lifecycle and eCRM partner across several platforms
Email strategy, automation, deliverability, ESP selection, SMS and push
ActionRocket
Clerkenwell, EC1V
Teams that need standout email creative and clean code
CRM creative strategy, copy, design and email code
Jarrang
Old Street, EC1Y
Enterprise teams on Salesforce Marketing Cloud, Mapp or Campaign Monitor
Email strategy, build, testing, deliverability, segmentation and reporting
CEEK Marketing
Soho, WC2H
Hospitality and lifestyle brands
Email, CRM, social, content
Underground Ecom
Farringdon, EC1R
Ecommerce brands that want a large Klaviyo retention team
CRM audits, retention strategy, creative, flows, SMS and WhatsApp
Superco
Bermondsey, SE1
Shopify and subscription brands
Klaviyo email and SMS, Shopify Plus, Recharge
Remarkable
Shoreditch, EC2A
Enterprises needing CRM and data behind email
CRM, CDP, analytics, Salesforce, Dynamics
Fixate
Charing Cross Road, WC2H
Consumer brands on Klaviyo, Brevo or ActiveCampaign
Email, SMS and push strategy, automations, design, deliverability, loyalty
RAPP London
Southwark, SE1
Large brands running data-driven CRM
Precision marketing, CRM, data, creative
Sendfluence
Wenlock Road, N1
Growing consumer brands on Klaviyo or Mailchimp
Email and CRM campaigns, flows, design, copy, segmentation
Enchant Agency is a London-headquartered email marketing and eCRM agency founded in 2014 by Philip Storey. Its head office is on the fifth floor of 167-169 Great Portland Street in Fitzrovia, and it also lists offices in Cambridge, Berlin and New York. The agency describes itself as a lifecycle marketing agency, and its services run from email audits and roadmaps through automation, list growth, design, HTML builds, copywriting, deliverability and ESP selection, alongside SMS, push, in-browser and WhatsApp messaging.
Platform breadth is a key strength. Enchant lists itself as a Klaviyo Master Platinum Partner, a HubSpot Platinum Solutions Partner, a Braze Alloys partner, an Iterable platform partner and a Data & Marketing Association official partner. Its site also states that it was named Klaviyo’s 2026 EMEA UK&I Partner of the Year. Clients shown on its site include BlackRock, Timex, Victorinox, DFS, Neal’s Yard Remedies, Mubi and Go Ape.
Enchant suits established retail, consumer and financial brands that want one senior partner to plan and run email and wider CRM across several channels and platforms.
2. ActionRocket — Independent CRM Creative Agency Focused On Email Design And Code
ActionRocket is an independent CRM creative agency with its creative studio on the fourth floor of 9 Dallington Street in Clerkenwell, EC1V. Its site says it has been working in email since 2012, and it describes itself as an all-in-one partner for CRM creative, organised around four services: strategy, copy, design and code. It builds email design systems, campaigns and promotional programmes, and its code service covers making sends render and behave properly across inboxes.
The agency’s site features work for PizzaExpress, LW Theatres and BBC Studios, including a Bluey campaign. It also lists industry recognition including an OMMA award for Best Use of Dynamic Email Content, a Lovie for Best Email Newsletter and Hermes awards, and it is a member of the Data & Marketing Association.
ActionRocket is a strong fit for in-house CRM teams that already run their own ESP and data but need a specialist to raise the quality of email creative, build modular templates and solve rendering problems.
3. Jarrang — Enterprise Email And CRM Agency With An Old Street Office
Jarrang describes itself as an email marketing agency with offices in London and Cornwall. The London team is based at the White Collar Factory on Old Street Yard, EC1Y, and the second office is in Falmouth. The agency says it has two decades of experience, and it splits its work into four areas: strategy (reviews, audits and planning), deployment (design, build, testing, QA and deliverability), audience management (data, segmentation, automation and integrations) and reporting.
Jarrang leans towards enterprise email platforms. It works with Salesforce Marketing Cloud, Mapp and Campaign Monitor, and lists Salesforce, Validity, Litmus and Mapp as partners. Featured work includes rebuilding email for Milwaukee, supporting a Ryobi marketing team on Salesforce Marketing Cloud and email for Exclusive Collection, with testimonials from Motability Operations and Seasalt Cornwall.
Jarrang suits larger organisations with complex data and enterprise platforms that want a dedicated email agency to run production, testing and reporting reliably.
4. CEEK Marketing — Email And CRM For Hospitality And Lifestyle Brands
CEEK Marketing was founded in 2016 as a hospitality marketing agency and opened its Soho headquarters in 2022. Its contact page lists the office at 4th Floor, 120 Charing Cross Road, WC2H.
Email and CRM sit alongside social, content and paid media in its service mix. Client logos on its site include The Savoy London, Disney, Ennismore, Deliciously Ella and Lavazza, and it publishes case studies for Quorn Stone, Mogu Mogu and DAME.
CEEK suits hotels, restaurants and lifestyle brands that want email and CRM run by a team that already understands guest and customer journeys in their sector.
5. Underground Ecom — Email-First CRM And Retention Agency In Farringdon
Underground Ecom is a CRM and customer retention agency based at 103 Farringdon Road, EC1R, a short walk from Farringdon station. It describes itself as having email at its core, and it organises its work into six services: CRM audit and roadmap, CRM and customer retention strategy, creative and execution, automations and flows, SMS and WhatsApp management, and advanced customer retention.
The agency says it is one of the largest Klaviyo partners in EMEA and that it has worked with more than 150 clients worldwide, with $165 million in trackable sales attributed to its work. It also runs a CRM Impact Session built around a brand’s own Klaviyo data as a starting point for new clients.
Underground Ecom suits ecommerce brands that have outgrown a freelancer or small retainer and want a larger specialist team to own strategy, creative and automation across email, SMS and WhatsApp.
6. Superco — Shopify Platinum Partner With A Klaviyo Retention Practice
Superco is a Shopify Plus agency based at 7 Hatchers Mews in Bermondsey, SE1, and says it has been building ecommerce brands since 2020.
Its retention team runs email and SMS on Klaviyo, and it is a Shopify Platinum Partner and a Recharge Elite partner for subscription brands. Clients named on its site include Allbirds, Represent, Ursa Major, House of Spoils, Puresport and Funkin Cocktails. It won at the European Agency Awards in 2022 and 2023, and it runs the GROW Conference for ecommerce teams.
Superco suits Shopify brands that want their store, subscriptions and Klaviyo flows handled by one in-house London team.
7. Remarkable — Salesforce And Dynamics CRM Partner For Data-Led Marketing
Remarkable, formerly Sagittarius, brings together more than 40 years of heritage from Sagittarius, Ultimedia, Unify and Nemetos Tanasuk. Its London office is at Cosmopolitan House, 2 Phipp Street, Shoreditch, EC2A, with further offices in Manchester, Chicago and Dubai.
Its CRM and data practice joins CRM, customer data platforms and analytics into a single customer view, and it is a solutions partner for Salesforce and Microsoft Dynamics. The agency says it has more than 70 digital practitioners across the UK, US and GCC, and clients on its site include Liontrust, Berkeley Group, Baxi, Jacksons Fencing, Hexagon and Just.
Remarkable suits larger organisations whose email programme depends on getting CRM and customer data right first.
8. Fixate — CRM Marketing Agency For Email, SMS And Push On Charing Cross Road
Fixate is a CRM marketing agency with its office on the fourth floor of 120 Charing Cross Road, WC2H, between Soho and Covent Garden. It delivers strategy, creative and technical work across email, SMS and push, with email as its main channel. Its services include automations, campaigns, email copywriting and design, form optimisation, deliverability, segmentation, data insight, A/B testing and loyalty.
Fixate works across several email platforms and has dedicated service pages for Klaviyo, Brevo and ActiveCampaign, which is useful for brands that are not on Klaviyo. Testimonials on its site come from Deliciously Ella and PRODOG.
Fixate suits consumer brands that want one team to plan and run email, SMS and push together, including smaller brands on Brevo or ActiveCampaign.
9. RAPP London — Omnicom Precision Marketing And CRM Agency
RAPP is a global precision marketing agency within Omnicom. Its London office is at Floor 4, Bankside 3, 90-100 Southwark Street, SE1.
The agency focuses on data-driven, one-to-one customer communication at scale. Its London work includes campaigns for Samsung Galaxy Z Flip4, Virgin Media and Laithwaites, and the network publishes a case study for Mastercard Priceless. Its news section says it was named Campaign Global Agency of the Year 2024.
RAPP suits large brands that want CRM and direct customer communication planned as part of a wider data and creative programme.
10. Sendfluence — Performance Email And CRM Agency For Consumer Brands
Sendfluence is a performance-driven email marketing and CRM agency with its address at 20-22 Wenlock Road, N1, in Islington. Its service covers copywriting, email design, testing and optimisation, flow setup, lead capture, segmentation, campaign management, reporting and regular strategy calls. It specialises in ecommerce and works mainly in Klaviyo and Mailchimp.
The agency is an official Klaviyo partner and an official Shopify partner. Brands named on its site include CleanCo, David Gandy Wellwear, OceanSaver, Dr Sebagh, VIVO Life, LOVE CORN, FLOC Brewing and Mrs Balbir Singh, which gives a good sense of its focus on food, drink, wellness and beauty.
Sendfluence suits challenger consumer brands that want hands-on campaign execution and regular strategic input without enterprise agency overheads.
How To Choose An Email Marketing Agency In London
Which Email Platform Do You Use, Or Plan To Use?
Platform fit narrows the field quickly. Shopify brands on Klaviyo have a wide choice of specialists, including Underground Ecom, Sendfluence and Superco. Fixate also covers Brevo and ActiveCampaign. Teams on Salesforce Marketing Cloud, Mapp, Braze, Dynamics or HubSpot should look for agencies that name those platforms and partner tiers on their own sites, such as Jarrang, Enchant Agency and Remarkable. Ask to see recent work on your exact platform, not just general email samples.
Do You Need Strategy, Execution Or Creative?
Email agencies tend to specialise. Some run the whole programme from strategy to weekly sends. Others, like ActionRocket, focus on creative, copy and code, while CRM-led agencies like Remarkable and RAPP London start with your customer data. Decide whether you need extra hands, better creative or a data and CRM rebuild before you shortlist.
How Much Should You Budget?
Most London email agencies quote monthly retainers based on send volume, number of flows and how much design and copy is included. Few publish prices, so ask each shortlisted agency for a sample retainer and a breakdown of what it covers. Audits, migrations and template builds are usually quoted as one-off projects. Always ask what is included in a retainer and how extra campaigns are charged.
How Will Results Be Measured?
Agree the metrics before you sign. Revenue attributed to email, revenue per recipient, list growth, deliverability and unsubscribe rates are more useful than open rates alone, which privacy changes have made less reliable. Ask each agency how it sets up attribution, how often it reports and what it will change if results stall.
Does Being In London Matter?
Most email work is delivered remotely, but a London base helps if you want workshops, in-person planning sessions or easy access during busy trading periods such as Black Friday. It also means the team understands UK consumer habits, UK GDPR and PECR consent rules for marketing email and SMS.
The best email marketing agency in London for your business depends on your platform, your sector and the kind of help you need. Enchant Agency and Jarrang suit larger organisations with complex, multi-platform CRM, and Remarkable and RAPP London suit brands whose email depends on CRM and data work. ActionRocket stands out for creative and code. Underground Ecom, Sendfluence and Superco give Shopify and DTC brands a strong choice of Klaviyo specialists, Fixate covers email, SMS and push across several platforms, and CEEK Marketing is the pick for hospitality and lifestyle brands.
Shortlist two or three firms, ask each for platform-specific case studies and a sample plan for your first 90 days, and compare how clearly they explain measurement. The agency that can show you comparable results on your platform, and explain exactly how it will report them, is usually the safest choice.
