Email Marketing That Converts
From automated welcome sequences to segmented campaigns that drive repeat purchases, our London email marketing team builds data-driven strategies across HubSpot, Mailchimp, and Klaviyo that turn your subscriber list into a reliable revenue channel.
42:1
Average ROI achieved across email campaigns
68%
Average open rate increase within first 90 days
£2.8M+
Revenue generated through email for London clients
3.4M+
Emails sent and optimised across all accounts
Email marketing remains the single highest-ROI channel in digital marketing, and yet the vast majority of businesses in London barely scratch the surface of what their subscriber list can deliver. As a specialist email marketing agency based in Mayfair, Byter Digital builds sophisticated email programmes that go far beyond monthly newsletters, we create automated lifecycle flows, segmented campaigns, A/B tested subject lines, and revenue-driving sequences that work around the clock.
Whether you are a hospitality brand looking to fill mid-week covers, a fitness studio driving class bookings, or a professional services firm nurturing high-value leads over months-long sales cycles, our London team designs email strategies tailored to your customer journey. We work across all major platforms including HubSpot, Mailchimp, Klaviyo, and specialist systems like SevenRooms and OpenTable for hospitality clients.
What separates Byter from other email marketing agencies in London is our obsession with measurable outcomes. We do not celebrate open rates in isolation, we track click-through rates, conversion rates, revenue per email, and lifetime subscriber value. Every campaign, automation, and template we build is designed to move a commercial metric that matters to your business. Our clients typically see a 35–50% uplift in email-attributed revenue within the first quarter of working with us.
Operating from 33 Cavendish Square in the heart of London, we understand the pace at which London businesses need to move. Our email marketing team operates on fast turnarounds, responsive reporting cycles, and a collaborative approach that makes us feel like an extension of your in-house team rather than an outsourced supplier.
Email Automation That Works While You Sleep
The true power of email marketing lies in automation. Our London team builds sophisticated automated workflows across HubSpot, Klaviyo, and Mailchimp that trigger based on customer behaviour, whether that is a welcome sequence for new subscribers, an abandoned cart recovery flow for e-commerce brands, or a re-engagement series for lapsed customers. These automations run continuously, generating revenue without any manual intervention.
For hospitality clients across London, we build reservation confirmation sequences, post-visit feedback requests, birthday and anniversary offers, and seasonal re-engagement campaigns using SevenRooms and OpenTable integrations. For retail and e-commerce brands, our Klaviyo specialists create browse abandonment flows, post-purchase upsell sequences, and win-back campaigns that recover lost revenue on autopilot.
Every automation we build is mapped against your customer journey, tested thoroughly before launch, and optimised continuously based on performance data. We use conditional logic, dynamic content blocks, and behavioural triggers to ensure the right message reaches the right person at exactly the right moment.
Segmentation and Personalisation at Scale
Sending the same email to your entire list is a relic of the past. Modern email marketing demands segmentation, dividing your audience into meaningful groups based on behaviour, demographics, purchase history, and engagement level. Our London email strategists build segmentation frameworks that dramatically improve engagement and revenue per send.
Using HubSpot's CRM data, Klaviyo's predictive analytics, or Mailchimp's audience insights, we create segments such as VIP customers, at-risk churners, first-time buyers, high-intent prospects, and geo-targeted London audiences. Each segment receives tailored messaging, offers, and creative that resonate with their specific needs and stage in the customer lifecycle.
Personalisation extends beyond inserting a first name. We use dynamic content blocks, product recommendations based on purchase history, location-specific offers for London postcodes, and send-time optimisation to ensure every email feels individually crafted, even at scale across lists of 100,000+ subscribers.
Template Design and Deliverability
A beautifully designed email that lands in the spam folder is worthless. Our email marketing agency in London takes a dual approach: we create visually stunning, brand-consistent email templates whilst simultaneously ensuring best-in-class deliverability. Every template is built mobile-first, tested across 90+ email clients using Litmus, and optimised for fast loading times.
On the deliverability side, we manage sender reputation through proper authentication (SPF, DKIM, DMARC), list hygiene protocols, engagement-based sending, and gradual warm-up strategies for new domains. For London businesses switching to a new email platform, we handle the full migration, including list cleaning, preference centre setup, and domain authentication, to ensure a smooth transition with zero deliverability disruption.
Our design team creates modular template systems that your team can reuse and customise, reducing production time for future campaigns. Whether you need a clean editorial newsletter, a promotional campaign with dynamic product blocks, or a transactional email that reinforces your brand, we deliver templates that look exceptional and perform even better.
Reporting, Analytics, and Continuous Optimisation
Every email we send generates data, and we use that data relentlessly to improve performance. Our reporting dashboards, built within HubSpot, Klaviyo, or custom Google Looker Studio reports, give you full visibility into open rates, click-through rates, conversion rates, revenue attribution, and list growth metrics.
Beyond reporting, we run structured A/B testing programmes on subject lines, preview text, send times, creative layouts, call-to-action placement, and offer structures. Our London clients benefit from learnings across our entire portfolio, when we discover that a particular subject line formula drives 23% higher open rates for hospitality brands, that insight gets applied across relevant accounts immediately.
Our Process
How We Work
Our proven process delivers consistent results for London businesses
Audit and Platform Review
We conduct a comprehensive audit of your current email programme, platform setup, list health, deliverability scores, and automation workflows to identify quick wins and strategic gaps.
Strategy and Segmentation Framework
We develop a tailored email strategy covering audience segmentation, content calendar, automation roadmap, and KPI targets aligned to your commercial objectives.
Template Design and Build
Our designers create mobile-first, brand-consistent email templates tested across 90+ email clients. We build modular systems your team can reuse for ongoing campaigns.
Automation Setup and Testing
We build and QA all automated workflows, from welcome sequences and post-purchase flows to re-engagement and win-back series, with thorough testing before any email goes live.
Campaign Launch and Optimisation
Campaigns launch with A/B testing on subject lines, content, and send times. We monitor performance daily during the first week and adjust targeting, creative, and cadence in real-time.
Monthly Reporting and Growth
You receive detailed monthly reports covering all key metrics, A/B test results, automation performance, and strategic recommendations for the following period.
Services
What's Included
Everything you need, nothing you don't
HubSpot Email Marketing
Full-service HubSpot email management including workflow automation, CRM integration, smart content, and lead scoring. We are experienced HubSpot partners working with London businesses of all sizes.
Klaviyo for E-Commerce
Specialist Klaviyo setup and management for Shopify and e-commerce brands. We build flows that recover abandoned carts, drive repeat purchases, and increase customer lifetime value.
Mailchimp Campaign Management
Expert Mailchimp campaign creation and optimisation for SMEs and startups. We handle audience management, template design, automation, and reporting across Mailchimp's full feature set.
Automated Email Sequences
We design and build multi-step automated workflows triggered by user behaviour, welcome series, nurture sequences, post-purchase flows, birthday campaigns, and re-engagement programmes.
Newsletter Strategy and Production
Weekly or monthly newsletter design, copywriting, and distribution. We create content calendars, write compelling copy, and handle end-to-end production so your team can focus on running the business.
List Growth and Lead Capture
Strategic pop-up design, landing page integration, lead magnet creation, and signup form optimisation to grow your subscriber list with qualified, engaged contacts.
Deliverability Management
SPF, DKIM, and DMARC authentication, list hygiene, warm-up strategies, and sender reputation monitoring to ensure your emails consistently reach the inbox rather than the spam folder.
A/B Testing and Optimisation
Structured testing programmes across subject lines, preview text, content blocks, CTAs, send times, and audience segments to continuously improve open rates, clicks, and conversions.
Email Marketing Results for London Businesses
London
Email Marketing in London
As a London-based email marketing agency operating from Mayfair, Byter Digital works with businesses across every borough and sector. Our hospitality clients, from Soho restaurants to Knightsbridge hotels, rely on our email programmes to drive midweek bookings, promote seasonal menus, and nurture loyalty among London diners. We understand the seasonal rhythms of London hospitality and build email calendars that capitalise on key moments from London Fashion Week to the festive season.
For London's thriving e-commerce and retail sector, we build Klaviyo and Shopify email integrations that recover abandoned carts, drive repeat purchases, and turn one-time buyers into brand advocates. Our London retail clients see some of the highest email ROI figures in our portfolio, with automated flows frequently generating more revenue than paid advertising channels.
London professional services firms, solicitors, accountants, consultancies, and property agencies, benefit from our HubSpot-powered lead nurturing sequences. We build email workflows that guide prospects through longer sales cycles with educational content, case studies, and perfectly timed calls-to-action. Based in the heart of London at 33 Cavendish Square, we are always available for face-to-face strategy sessions with our London clients.
Byter completely transformed our digital presence. Their team understood our brand from day one and delivered results that exceeded our expectations. If you're looking for a marketing agency in London that actually delivers, look no further.
Restaurant Owner, Mayfair
FAQ
Frequently Asked Questions
Which email marketing platform do you recommend for London businesses?
It depends on your business model. For B2B companies and professional services, we typically recommend HubSpot for its powerful CRM integration and lead scoring capabilities. For e-commerce brands using Shopify, Klaviyo is our top choice due to its deep product integration and predictive analytics. For SMEs and startups in London looking for a cost-effective solution, Mailchimp offers excellent value. We assess your specific needs during our initial audit and recommend the platform that best fits your goals and budget.
How quickly can you set up email automation?
A basic automation setup, including a welcome sequence, post-purchase flow, and abandoned cart recovery, can typically be live within 2–3 weeks. More complex programmes involving multiple audience segments, advanced conditional logic, and integration with external systems like SevenRooms or your CRM may take 4–6 weeks. We prioritise the highest-impact automations first so you start seeing returns as quickly as possible.
What kind of ROI should we expect from email marketing?
Email marketing consistently delivers the highest ROI of any digital channel. Across our London client portfolio, we see an average return of £42 for every £1 spent on email marketing. E-commerce brands with well-optimised automation flows often exceed this, while B2B businesses with longer sales cycles typically see returns of £25–35 per pound invested. We set realistic ROI targets during the strategy phase based on your industry, list size, and current performance benchmarks.
Can you migrate our existing email lists to a new platform?
Absolutely. We handle full platform migrations regularly for London businesses, including list export and cleaning, custom field mapping, automation recreation, template rebuilds, domain authentication, and gradual warm-up to maintain deliverability. We have migrated clients from Mailchimp to HubSpot, from legacy systems to Klaviyo, and between numerous other platforms without any loss of data or deliverability.
How do you handle GDPR compliance for email marketing?
GDPR compliance is built into everything we do. We ensure all signup forms include proper consent mechanisms, build double opt-in flows where appropriate, maintain preference centres that give subscribers control over their data, and implement automated suppression of unsubscribes and bounces. We also audit existing lists for compliance and can advise on re-permission campaigns if your current consent records are unclear.
What metrics do you track and report on?
We report on open rates, click-through rates, conversion rates, revenue per email, revenue per subscriber, list growth rate, unsubscribe rate, bounce rate, deliverability score, and automation-specific metrics like flow completion rate and recovery rate. All metrics are benchmarked against industry averages and your historical performance. Reports are delivered monthly with clear strategic recommendations.
Do you write the email copy or do we need to provide content?
We handle everything, strategy, copywriting, design, and deployment. Our copywriters specialise in email marketing and write compelling subject lines, preview text, body copy, and calls-to-action tailored to your brand voice and audience. If you prefer to provide content, we are equally happy to work from your briefs and handle the design, coding, and optimisation.
How often should we be emailing our subscribers?
There is no one-size-fits-all answer, but for most London businesses we recommend a minimum of one campaign per week supplemented by automated flows. Some e-commerce clients send 3–4 times per week successfully, while B2B firms may send fortnightly newsletters alongside automated nurture sequences. We test frequency with your audience and find the sweet spot that maximises engagement without increasing unsubscribes.
Can you integrate email marketing with our CRM and website?
Yes, integration is core to our approach. We connect your email platform with your CRM (HubSpot, Salesforce, Pipedrive), website (WordPress, Shopify, custom builds), booking systems (SevenRooms, OpenTable), and analytics tools (Google Analytics, Looker Studio) to create a unified customer data flow. This means every email is informed by real-time behaviour data and every conversion is properly attributed.
What is the minimum contract length for email marketing services?
We recommend a minimum commitment of three months, which allows time for a proper audit, strategy development, automation build, and at least one full optimisation cycle. Most of our London clients work with us on ongoing retainers of six to twelve months as email marketing benefits enormously from continuous testing and refinement. We also offer one-off projects for specific needs like platform migration or automation setup.
Ready to Transform Your Email Marketing?
Book a free consultation with our London email marketing team. We will audit your current programme, identify the biggest opportunities, and show you exactly how we can drive more revenue from your subscriber list.
Based at 33 Cavendish Square, Mayfair, London · 020 4540 5675 · WhatsApp