B2B Companies Using Klaviyo in the UK: 398 Active Firms (2026)
B2B firms running specialist email marketing technology sell products or services to other organisations across the UK.
Marketing, ecommerce and revenue-operations teams are the usual buying centres, especially where repeat orders, renewals or account nurturing matter more than one-off lead capture. For business-to-business suppliers, the system sits between the website, customer database and sales process: it segments known contacts, triggers lifecycle messages and keeps opt-out handling visible to the commercial team. Adoption tends to signal a direct-channel posture, a marketing function with enough capacity to test and measure campaigns, and a budget for integration or agency support. It is more common among mid-market suppliers and multi-site operators than among very small businesses using only a basic newsletter tool.
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Adoption in the UK business-to-business cohort is fairly selective: 398 active trading companies run this specialist email-marketing stack, rather than a generic newsletter tool. It sits fourth among detected marketing-automation systems in the sector, at 4.2% of 9,511 detections, behind three higher-share platforms. The registered-office pattern is London-heavy but not only London-based: London accounts for 20.4% of users, followed by the South East at 13.3%, the South West at 11.6%, the North West at 10.6% and Yorkshire and The Humber at 9.8%. Reported employment across this adopter cohort totals 4,180 people.
Business-to-business adopters are not regulated as one licensed industry; obligations depend on the activity underneath the sale, including financial services, telecoms, data processing or professional services. The ICO treats direct marketing under PECR as covering live and automated calls, electronic mail and fax. Its guidance says the electronic-mail rule does not apply to corporate subscribers, so emails or texts to corporate bodies do not require PECR consent, but sender identity cannot be hidden and a valid opt-out address must be provided. UK GDPR still applies when business-contact personal data is processed, and live marketing calls need screening against CTPS and TPS, including prior objections.
Adoption appears likely to follow the shape of direct commerce rather than the whole business-to-business market. Product-led suppliers with repeat purchasing cycles tend to have more reason to keep a specialist lifecycle-messaging layer, while service firms with relationship-led sales may fold email activity back into broader CRM or agency-managed tooling. The cohort also appears weighted towards businesses that already run several web-operating components, so switching costs may sit in integrations and consent processes rather than licence fees alone. Procurement pressure is likely to favour clearer attribution, cleaner contact governance and fewer overlapping marketing tools, rather than a broad rush into new standalone systems.
Adoption by company size
Adoption of Klaviyo rises with company size across the trading UK B2B companies in this cohort. 0.3% of the 76,784 companies with under 10 employees run Klaviyo (254 detected). 0.4% of the 31,788 companies with 10–50 employees run Klaviyo (128 detected). 0.6% of the 3,773 companies with over 50 employees run Klaviyo (23 detected). That is a 0.3% gap between the over 50 employees and under 10 employees bands.
398
Active firms
2026
4.2%
Of detected Marketing automation share
UK B2B
7
Median headcount
Filed accounts
922
Verified contacts
Across this cohort
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Key facts
About 11% of the trading cohort reports turnover above £5M (46 of 398 firms) — the rest sits below that revenue band.
6% of the cohort was incorporated since 2022 (24 firms), so a sizeable share is in its first few filing cycles.
Within B2B firms with a detectable marketing-automation system, this system accounts for 4.2%, or 398 of 9,511 detections, behind three larger detected systems.
London is the largest registered-region cluster for these B2B users at 20.4% (81), followed by the South East at 13.3% (53) and the South West at 11.6% (46).
Wholesale & Distribution is tagged on 53.0% (211) of the cohort, while E-commerce appears on 35.2% (140); sector tags overlap, so these are not exclusive groups.
The co-detected stack is not just email: one site-infrastructure technology appears on 70.6% (281) of sites, and one tag-management technology on 59.3% (236).
ICO guidance says PECR consent is not required for B2B emails or texts to corporate subscribers, but senders must identify themselves, provide a valid opt-out address and consider UK GDPR where business-contact data is personal data.
Marketing automation market share among UK B2B
Share of the 9,511 UK B2B with a detectable system. As of June 2026.
What else do Klaviyo-running B2B run?
Share of the 398 Klaviyo-running UK companies where each technology was also detected. As of June 2026.
Where Klaviyo B2B are, and how healthy they look
By region
By registered-office region; companies without a regional match count toward Rest of UK.
By financial health
From filed accounts; firms with fewer than two filings show as insufficient history.
7
Median headcount
£837.5K
Median UK turnover
11.6%
Above £5M turnover
24
Incorporated since 2022
922 verified decision-maker contacts
across these 398 companies, with emails available in Firmbase. Filter by role, seniority and stack.
Top UK B2B using Klaviyo
Ranked by sales-readiness score: an AI model assesses what each company does, its sector and size, and scores its overall fit. Best-fit prospects appear first.
Financial sub-scores
Computed from 4 filingsProvides cloud-based construction supply chain management software. The platform enables contractors, merchants, and manufacturers to manage tendering, request and compare material quotes, purchase…
Serves B2B customers in the construction supply chain, including main contractors, subcontractors, house builders, procurement teams, builders’ merchants and manufacturers involved in materials…
Financial Health
StrongStrong · Hiring · 14% CAGR over 3y
Location
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Computed from 4 filingsProvides cloud-based fleet and driver compliance management software. Features include digital vehicle walkaround checks, defect reporting, maintenance scheduling, tachograph analysis, driver licence…
Serves B2B transport operators and organisations managing vehicle fleets and drivers, including logistics, construction, utilities, waste, taxis, food service and other fleet-intensive sectors…
Financial Health
StrongStrong · Growing, Hiring · 14% CAGR over 3y
Location
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Computed from 5 filingsProvides business telecommunications services including virtual and non‑geographic phone numbers, VoIP and hosted PBX systems, business broadband, and cloud-based call handling tools such as IVR,…
Sells to businesses, charities and public sector organisations needing business telephony and connectivity, including SMEs, call centres, healthcare providers, property firms, recruiters and…
Financial Health
HealthyHealthy · -2% CAGR over 5y
Location
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Computed from 5 filingsOnline retailer of workwear, personal protective equipment (PPE), and safety supplies, including hi‑vis clothing, gloves, safety footwear, helmets, respirators, and related workplace products such as…
Serves businesses and tradespeople needing safety and workwear supplies, including construction, cleaning, food preparation, medical, automotive, gardening, office and facilities teams placing online…
Financial Health
StrongStrong · -3% CAGR over 5y
Location
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Computed from 5 filingsSupplies personal protective equipment and workwear, including safety footwear, helmets, gloves, eye and hearing protection, respiratory gear, fall‑protection equipment, and first aid products. Also…
Serves B2B safety, procurement and operations teams in industrial, construction, offshore, utilities and workplace environments.
Financial Health
HealthyHealthy · Growing, Hiring · 4% CAGR over 4y
Location
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Computed from 3 filingsBuys, refurbishes and sells data centre hardware including servers, storage systems and memory. Supplies refurbished IT equipment through an e‑commerce platform and provides components and parts for…
Serves businesses, IT teams and data centre operators sourcing refurbished data centre hardware across Europe, North America and Asia Pacific.
Financial Health
StrongStrong · Growing, Hiring · 12% CAGR over 2y
Location
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Computed from 3 filingsProvides print management and design services, including brand portals for ordering marketing materials. Supplies printed marketing collateral, point‑of‑sale displays, branded promotional merchandise…
Sells to marketing, procurement and operations teams at businesses, public sector bodies, universities, councils and membership organisations that require managed brand, print, merchandise, workwear…
Financial Health
StrongStrong · Growing · 4% CAGR over 2y
Location
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Computed from 5 filingsWholesale supplier of women’s clothing and accessories, offering Italian-made fashion including dresses, knitwear, co‑ords, denim and outerwear. Sells single‑piece wholesale items to retail buyers…
Sells B2B to womenswear retail buyers, boutiques and online fashion retailers stocking wholesale clothing and accessories, with ordering and delivery aimed at UK and EU customers.
Financial Health
StrongStrong · Hiring · 6% CAGR over 4y
Location
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Computed from 5 filingsSupplies professional hairdressing and beauty products and equipment to salons and colleges through wholesale outlets and an online store. Product range includes haircare, hair colour, electrical…
Serves professional hair and beauty trade customers, including hair salons, barbers, beauty and spa salons, nail technicians, and training colleges.
Financial Health
HealthyHealthy · Hiring · 8% CAGR over 4y
Location
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Computed from 5 filingsSupplies professional hairdressing and beauty products through an online store, including hair colour, styling tools, salon electricals, nail products, waxing and tanning supplies, hair extensions,…
Sells trade-only to professional hairdressers, beauty therapists, nail technicians, tanning specialists, salons, barbers and students needing salon supplies, equipment and training products.
Financial Health
StrongStrong · Hiring · 15% CAGR over 4y
Location
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Computed from 5 filingsSupplies corporate gifts, branded merchandise and employee reward products. Operates incentive and loyalty programmes, including points‑based redemption platforms, and provides sourcing, custom…
Sells B2B to UK and EU businesses of all sizes, including HR, employee engagement, marketing and loyalty teams running staff recognition, customer retention, promotional merchandise or competition…
Financial Health
HealthyHealthy · Hiring · 3% CAGR over 4y
Location
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Computed from 5 filingsSupplies food and takeaway packaging to restaurants, takeaways and retailers, including pizza, noodle and burger boxes, cups, bags, plastic containers and disposable tableware. Also provides…
Serves UK food businesses including takeaways, restaurants, cafes, commercial kitchens and supermarkets that need food, fast-food, takeaway and branded packaging supplies.
Financial Health
HealthyHealthy · -50% CAGR over 5y
Location
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Computed from 3 filingsProvides construction equipment and tool rental services, including excavators, lifts, forklifts and compressors. Also sells new and used machinery, supplies parts, and offers fleet management…
Serves construction contractors, jobsite operators and fleet managers needing rental or purchased equipment, tools, fleet tracking and service support, with related customers in landscaping,…
Financial Health
StrongStrong · Hiring · 61% CAGR over 2y
Location
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Computed from 5 filingsProvides recruitment services and training programmes, including pre-employment academies and compliance courses. Supports employers with high-volume hiring, candidate screening, aptitude testing and…
Serves employers and training partners needing recruitment, CSR/social-impact hiring and compliance training, especially in aviation, contact centres, construction, defence, digital, health and…
Financial Health
HealthyHealthy · -4% CAGR over 4y
Location
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Computed from 3 filingsProvides large-format digital printing for trade customers, producing banners, mesh banners, boards, self-adhesive vinyl films, dye‑sublimation textiles, wallcoverings, lightbox graphics and…
Serves trade print buyers and creative professionals, including agencies, sign makers, retailers, exhibition/event organisers and businesses needing large-format display materials.
Financial Health
HealthyHealthy · Hiring · 10% CAGR over 2y
Location
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Computed from 5 filingsProvides prize fulfilment and incentive programme services for brands, organising and delivering rewards for competitions, promotions, sales incentives and loyalty schemes. Sources merchandise, gift…
Serves businesses and major brands running competitions, promotions, sales incentives, employee recognition and customer loyalty schemes, including marketing and loyalty teams needing prize and…
Financial Health
StrongStrong · Growing, Hiring · 12% CAGR over 4y
Location
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Computed from 5 filingsProvides digital marketing and advertising services including growth strategy, data analytics, paid media management across social and search platforms, creative design and copywriting, and CRM…
Serves ambitious businesses and consumer brands, particularly marketing teams using paid social/search, CRM and first-party data platforms such as Meta, Google, Klaviyo and HubSpot.
Financial Health
HealthyHealthy · -7% CAGR over 4y
Location
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Computed from 3 filingsProvides digital marketing and web development services, including search engine optimisation (SEO), pay‑per‑click advertising, digital PR, email marketing, website design and build, eCommerce…
Serves growth-focused businesses across B2B and consumer markets, especially ecommerce brands and lead-generation companies with marketing or leadership teams investing in customer acquisition,…
Financial Health
StrongStrong
Location
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Computed from 5 filingsSupplies industrial and commercial workplace products including entrance and anti‑fatigue floor mats, rubber matting, anti‑slip flooring, spill control kits, storage cabinets, shelving systems,…
Sells primarily to businesses buying workplace safety, matting and handling products, including warehouses, workshops, commercial facilities and other industrial or trade environments. Also targets…
Financial Health
StrongStrong · Hiring · 14% CAGR over 4y
Location
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Computed from 3 filingsDistributes and manages luxury skincare, beauty and wellness brands for clinics, spas, salons and online retailers. Provides brand development, marketing support, training and business growth…
Sells B2B to doctors, aesthetic clinics, spas, salons and specialist e-tailers seeking luxury, science-backed skincare, wellness and beauty brands, with support for business growth, training and…
Financial Health
StrongStrong · Growing, Hiring · 47% CAGR over 2y
Location
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Computed from 5 filingsSupplies coffee machines and beverage equipment, including bean‑to‑cup, capsule and traditional espresso machines. Provides coffee beans, capsules, tea, hot chocolate, syrups and other drink…
Serves B2B customers including offices, restaurants, cafés, hotels, golf clubs and leisure venues that need coffee, beverage and refreshment supplies for staff, guests or customers.
Financial Health
StrongStrong · Hiring · 15% CAGR over 6y
Location
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Computed from 3 filingsProvides outsourced customer contact centre services, including omni‑channel customer support, multilingual assistance, sales and payment processing, and out‑of‑hours help. Also delivers back‑office…
Serves public sector organisations, government and education bodies, and private sector businesses in travel, transport, housing and property that need outsourced customer operations and support.
Financial Health
StrongStrong · Hiring · 22% CAGR over 2y
Location
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Computed from 5 filingsSupplies gas detection and safety equipment through an online store, including portable and fixed gas detectors, environmental and noise monitors, respiratory protection, fall protection gear, and…
Serves tradespeople, safety managers and industrial organisations, including construction, facilities management, pharmaceuticals, breweries, distilleries and swimming pool operators, plus direct…
Financial Health
StrongStrong
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Computed from 5 filingsSupplies takeaway and foodservice packaging through an online shop, including paper cups, food containers, pizza boxes, straws, cutlery and bagasse tableware. Focuses on recyclable or compostable…
Serves UK foodservice and hospitality businesses, including cafés, takeaways, restaurants, caterers and food-to-go retailers needing trade ordering and sustainable packaging supplies.
Financial Health
StrongStrong · Growing, Hiring · 32% CAGR over 4y
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Computed from 5 filingsSupplies electrical products and installation materials, including consumer units, circuit protection devices, wiring accessories, sockets and switches, cables, lighting equipment, ventilation…
Serves electricians, electrical contractors, tradespeople and DIY buyers seeking electrical, lighting, cable, ventilation, tools and hardware supplies through a UK retail/ecommerce distributor.
Financial Health
HealthyHealthy · Hiring · 10% CAGR over 4y
Location
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Computed from 5 filingsProvides employer branding research and analytics, analysing large datasets on employer reputation to deliver insights, reports, and benchmarking tools such as the Employer Brand Index to help…
Serves HR, talent acquisition and employer brand leaders at large enterprises and multinationals, including Fortune 500 organisations, focused on employer reputation across geographies.
Financial Health
StableStable · Hiring · 6% CAGR over 4y
Location
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Computed from 5 filingsManufactures and sells construction and agricultural machinery, including excavators, backhoe loaders, wheel loaders, telehandlers, forklifts and tractors. Also produces equipment attachments and…
Sells primarily to businesses and public sector organisations in construction, agriculture, logistics, municipalities, defence and OEM manufacturing, including equipment buyers, contractors, fleet…
Financial Health
StrongStrong · Growing · 0% CAGR over 4y
Location
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Computed from 3 filingsWholesales and distributes beers, wines, spirits and soft drinks to hospitality and retail customers. Supplies a large drinks portfolio with delivery and account management services, and develops and…
Serves UK hospitality and licensed-trade businesses, including pubs, bars, restaurants and venues, plus trade account customers buying beers, wines, spirits and soft drinks.
Financial Health
StrongStrong · Growing, Hiring · 10% CAGR over 2y
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Computed from 5 filingsSupplies health food and wellness products to retailers on a wholesale basis, including natural and organic foods, drinks, superfoods, vitamins and supplements, personal care items, baby products,…
Sells B2B to UK retailers buying wholesale natural, organic and health-focused food, drinks, supplements, personal care, baby, household and pet products.
Financial Health
HealthyHealthy · Hiring · 7% CAGR over 4y
Location
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Computed from 4 filingsSupplies and distributes health, beauty, baby and household products to retailers. Offers branded and own‑label items including hair accessories, skincare, grooming, pharmacy and nursery products,…
Sells B2B to retail trade buyers in the health, beauty and nursery sectors, primarily across the UK and Ireland, and also internationally. Serves retailers needing branded or private-label product…
Financial Health
HealthyHealthy · Profitable · -1% CAGR over 3y
Location
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Computed from 5 filingsSupplies professional skincare products and aesthetic treatment devices to clinics and practitioners. Distributes brands including Dermaceutic, Circadia, Celluma LED, Exceed microneedling and…
Serves UK dermatology and aesthetic professionals, including skin clinics, dermatologists and beauty practitioners, alongside retail consumers seeking skincare products.
Financial Health
HealthyHealthy · Hiring · 12% CAGR over 4y
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Computed from 3 filingsDesigns and supplies power tool accessories including drill bits, holesaws, circular saw blades, driver bits, and cutting accessories for drilling, sawing, and fastening applications, distributed…
Serves UK trade professionals, dealers, merchants and stockists in the power tool accessories market, with a partner network for retailers and a professional user community for tradespeople.
Financial Health
StableStable · -1% CAGR over 2y
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Computed from 5 filingsSupplies wholesale foodservice products including fresh, frozen and ambient foods and catering supplies. Distributes over 6,000 items to restaurants, cafés, schools, healthcare facilities, hotels,…
Serves education, healthcare and hospitality organisations across the North of England, including schools, colleges, universities, NHS facilities, cafés, hotels, event caterers, restaurants, bars,…
Financial Health
StrongStrong · Growing, Hiring · 27% CAGR over 4y
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Computed from 4 filingsWholesale distributor of vaping products, supplying e‑liquids, disposable and refillable vape devices, pods, coils, batteries, and related accessories from multiple brands through an online trade…
Serves UK vape retailers and trade buyers seeking wholesale e-liquids, vaping hardware, accessories and compliant prefilled vape kits from multiple brands.
Financial Health
StrongStrong · Growing, Hiring · 10% CAGR over 3y
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Computed from 2 filingsProvides digital marketing services including search engine optimisation, pay‑per‑click advertising, technical SEO, link building, digital PR and content marketing. Develops data‑driven campaigns to…
Serves brands and businesses, including ecommerce, B2B, B2C, FMCG, SaaS, fashion, finance and healthcare organisations, often working alongside in-house marketing teams.
Financial Health
HealthyHealthy · 0% CAGR over 1y
Location
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Computed from 5 filingsOperates an online store supplying industrial bearings, belts, and power transmission components. Product range includes ball and roller bearings, housed units, pulleys, couplings, roller chain, and…
Serves trade and retail buyers in the USA and UK needing industrial, agricultural, automotive, lawn and garden, and power transmission components, including maintenance teams, repair workshops,…
Financial Health
HealthyHealthy · Hiring · 17% CAGR over 4y
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Computed from 5 filingsSupplies professional hair and beauty products to salons and trade customers, including shampoos, colour systems, styling products, tools, electrical equipment, and salon furniture. Also offers…
Sells B2B to professional hair and beauty salons, stylists and salon owners buying trade haircare, colouring products, tools, furniture and education.
Financial Health
StableStable · -1% CAGR over 4y
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Computed from 3 filingsSupplies solar energy equipment through an online store, including solar panels, inverters, battery storage systems, mounting hardware, cables, and accessories. Offers power kits and components for…
Sells primarily to trade and commercial buyers in the solar and renewable energy market, including installers and contractors sourcing panels, inverters, batteries, mounting systems and accessories.…
Financial Health
StrongStrong · 167% CAGR over 1y
Location
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Computed from 3 filingsOperates an online pharmacy supplying aesthetic medicine and pharmaceutical products to healthcare professionals. Sells dermal fillers, skin boosters, fat dissolvers, polynucleotides, toxins, and…
Sells to UK doctors, dentists, pharmacists and aesthetic practitioners or clinics buying aesthetic treatment products, pharmaceutical supplies and clinical consumables online.
Financial Health
StrongStrong · Growing, Hiring · 112% CAGR over 2y
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Computed from 5 filingsManufactures and wholesales chocolates and confectionery, including continental chocolate bars, boxed chocolates, liqueur chocolates, biscuits and sweets. Supplies a wide range of branded…
Sells B2B to trade buyers in confectionery retail and wholesale, including independent shops, gift retailers and other stockists seeking fine chocolates, biscuits and free-from confectionery in the…
Financial Health
HealthyHealthy · Profitable, Hiring · 9% CAGR over 4y
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Computed from 3 filingsProvides B2B demand generation and digital marketing services including web design and development, branding, SEO, email marketing, content strategy, conversion rate optimisation, UX, and social…
Serves B2B companies across the UK, Europe and North America, especially businesses seeking outsourced marketing expertise instead of hiring in-house teams or needing extra capacity to scale demand…
Financial Health
StableStable · Hiring · 26% CAGR over 2y
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Computed from 5 filingsSupplies aesthetic and cosmetic clinic products through an online wholesale store, including dermal fillers, PDO threads, skin boosters, mesotherapy solutions, chemical peels, fat dissolvers, exosome…
Serves UK aesthetics clinics, cosmetic practitioners and beauty or medical professionals buying wholesale injectable skincare supplies, clinic consumables and training.
Financial Health
StrongStrong · Growing, Hiring · 16% CAGR over 4y
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Computed from 3 filingsSupplies cabinet hardware and fittings for kitchen, bedroom and bathroom furniture, including drawer systems, hinges, sliding door profiles, handles, storage solutions, runners and connecting…
Serves trade buyers in the kitchens, bedrooms and bathrooms sector, including kitchen fitters, joiners, shopfitters, cabinet makers and furniture manufacturers.
Financial Health
StrongStrong · Profitable, Growing, Hiring · 6% CAGR over 2y
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Computed from 5 filingsOnline retailer of office, hospitality and educational furniture and workplace equipment. Sells desks, office chairs, storage units, meeting tables, reception furniture, whiteboards, and related…
Serves UK organisations buying workplace, hospitality and education furnishings, including offices, call centres, restaurants, cafes, caterers, schools and nurseries, plus home-office buyers.
Financial Health
StrongStrong
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Computed from 5 filingsProvides marketing services, collecting and managing prospect data through its website to send promotional communications, conduct market research, and support marketing campaigns and client outreach…
Financial Health
StrongStrong · Hiring · 24% CAGR over 4y
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Computed from 5 filingsProvides ecommerce consultancy and digital services including Shopify store development and migration, ecommerce marketing, SEO, CRM and email campaigns, branding, UX design, and custom web…
Serves high-growth UK retail and ecommerce brands, particularly Shopify and Shopify Plus merchants seeking support across online store growth, migration, marketing, branding and development.
Financial Health
StrongStrong · Growing, Hiring · 18% CAGR over 4y
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Computed from 5 filingsProvides Shopify Plus e‑commerce design and development services for retail brands, including UI/UX design, website builds, platform migrations, data migration, conversion rate optimisation, SEO, and…
Serves B2B luxury and premium consumer brands, particularly design-conscious ecommerce retailers in fashion, jewellery, watches, footwear and lifestyle sectors using or moving to Shopify Plus.
Financial Health
StrongStrong · Growing, Hiring · 23% CAGR over 4y
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Computed from 5 filingsSupplies and distributes electrical equipment including industrial cables, low‑voltage control gear, drives, automation components, relays, sensors and terminal blocks. Also provides specialist power…
Serves B2B buyers such as industrial electrical contractors, control panel builders, automation engineers and maintenance teams, including UK and export customers.
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StrongStrong · Growing · 1% CAGR over 4y
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Computed from 5 filingsManufactures heavy- and medium-duty commercial trucks, including diesel and electric models, for freight and vocational use. Provides truck parts, maintenance services, and fleet technologies such as…
Serves commercial truck buyers, fleet operators, logistics and vocational transport businesses, and owner-operators needing medium- and heavy-duty truck dealer support, parts and service.
Financial Health
StrongStrong · Growing · 0% CAGR over 5y
Location
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Financial sub-scores
Computed from 5 filingsSupplies commercial refrigeration and catering equipment to hospitality and food service businesses. Sells display fridges and freezers, cold rooms, ice machines, blast chillers, drinks dispensers,…
Serves UK businesses needing commercial refrigeration and catering equipment, including restaurants, cafés, bars, pubs, caterers, food retailers and other hospitality or foodservice operators.
Financial Health
HealthyHealthy · -64% CAGR over 5y
Location
Unlock all 398 leads
Showing 50 of 398 — +348 more with verified decision-maker contacts, live data, and CRM sync.
Unlock all 398 leads
Showing 50 of 398 — +348 more with verified decision-maker contacts, live data, and CRM sync.
How Klaviyo usage is detected
Company data
Detected companies are joined to UK Companies House records and XBRL accounts data. Revenue and headcount figures come from the most recent filed accounts; where the company has not filed, values are estimated using a model trained on filed history and peer benchmarks and are labelled as estimates.
Detection
Firmbase crawls the public website of actively-trading UK companies and fingerprints the technologies present: tracking scripts, embedded forms, chat widgets, CMS markers and similar signatures. A company is included in this list when one or more of the technology's signatures are found on its site; closely-related variants of the same product are grouped under one name. Detection covers what is visible on the public web — a company using the technology purely internally, with no website footprint, will not appear. Counts are therefore a conservative floor, not a ceiling. B2B companies are identified using Firmbase's semantic classification of company activity, built from filings, websites and registered SIC codes rather than SIC codes alone. The detected counts and share figures on this page are computed within that sector cohort, so "share" always means share of B2B companies with a detectable system — not of all UK companies.
Freshness
Websites are re-crawled on a rolling basis and the underlying company data is refreshed from Companies House continuously; filings appear within days of submission. The list and its statistics are regenerated when the detected cohort moves meaningfully. You can see the last-updated timestamp near the top of the page.
Klaviyo is a trademark of its respective owner. Firmbase is not affiliated with, sponsored by, or endorsed by the trademark owner.
UK B2B by Marketing automation
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Frequently asked questions
How many UK B2B companies use Klaviyo?
What share of UK B2B companies run Klaviyo?
How is Klaviyo usage detected?
What size B2B companies use Klaviyo in the UK?
What do Klaviyo-running B2B companies also run?
Can I get contact details for these companies?
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