Marketing Agency Companies Using AddThis in the UK: 51 Active Firms (2026)
Marketing agencies running social-sharing website technology use embedded tools to prompt content sharing and audience tracking across UK campaigns.
Buying centres tend to sit with agency owners, performance-marketing leads and content teams, rather than central IT. For marketing agencies, running the sharing widget signals that owned-site content still forms part of the client proposition: campaign landing pages, resource hubs and editorial assets are expected to travel beyond paid media. The typical user looks like a specialist or lean mid-market agency selling to business clients, with project retainers, campaign support and audience-growth work more common than enterprise software procurement. It also suggests enough web operations capacity to manage tags, consent language and analytics hand-offs, but not necessarily a large engineering function.
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Within UK marketing agencies, the adoption cohort contains 51 actively trading companies running the tool, with reported headcount totalling 462. It ranks eighth in the detected social-media technology mix for the sector, at 9.2% against a marketing-agency denominator of 554. The registered-region skew is southern: London accounts for 39.2% and the South East 25.5%, followed by the North West at 9.8%, the West Midlands at 7.8% and the East of England at 7.8%. That shape fits a specialist agency base where ownership, content and performance teams often make website-stack choices close to client-delivery workflows.
Campaign work is not governed by a unified agency licence, but several rulebooks sit close to this stack. The ICO regulates data protection and PECR for direct marketing, so consent, cookies and contact permissions matter when a sharing tool feeds audience or remarketing workflows. Ofcom deals with misuse of public electronic communications networks, while the CMA and trading standards can act on unfair-trading practices. The ASA applies the CAP Code to advertisers, agencies and media, making claims substantiation and responsibility for client creative part of the operating context. Trade-body rules for direct marketing may add another layer for members.
Adoption appears likely to be shaped less by novelty than by maintenance pressure. Agencies with established content hubs may keep the sharing layer where it supports client reporting and low-friction distribution, especially when account teams can manage it without developer involvement. Others tend to rationalise overlapping scripts as consent management, page performance and attribution governance become more visible in client reviews. Bundling also matters: social distribution, analytics and tag control are often bought as adjacent capabilities, so standalone sharing tools can be displaced when agencies consolidate website operations around a narrower supplier base.
Adoption by company size
Adoption of AddThis varies by company size across the trading UK marketing agency companies in this cohort. 0.1% of the 54,246 companies with under 10 employees run AddThis (38 detected). 0.7% of the 1,903 companies with 10–50 employees run AddThis (13 detected). 0% of the 146 companies with over 50 employees run AddThis (0 detected). That is a 0.1% gap between the over 50 employees and under 10 employees bands.
51
Active firms
2026
9.2%
Of detected Social media share
UK marketing agency
5
Median headcount
Filed accounts
114
Verified contacts
Across this cohort
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Key facts
About 3% of the trading cohort reports turnover above £5M (2 of 51 firms) — the rest sits below that revenue band.
Within marketing agencies with a detectable social media system, this social-sharing tool accounts for 9.2% (51), from a denominator of 554 companies.
London accounts for 39.2% (20) and the South East for 25.5% (13) of the marketing agencies running this social-sharing tool.
68.6% (35) also run a website content-management system, while 45.1% (23) also run a tag-management tool.
AA/WARC says UK ad spend increased by 10.4% in 2024, with online formats growing 13.2% and £4 in every £5 of ad budgets spent online.
Audience tracking and direct marketing bring the ICO's data protection and PECR remit into scope; the ASA also applies the CAP Code to advertisers, agencies and media.
Social media market share among UK Marketing Agency
Share of the 554 UK Marketing Agency with a detectable system. As of June 2026.
What else do AddThis-running Marketing Agency run?
Share of the 51 AddThis-running UK companies where each technology was also detected. As of June 2026.
Where AddThis Marketing Agency 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.
5
Median headcount
£455.3K
Median UK turnover
3.9%
Above £5M turnover
0
Incorporated since 2022
114 verified decision-maker contacts
across these 51 companies, with emails available in Firmbase. Filter by role, seniority and stack.
Top UK Marketing Agency using AddThis
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 5 filingsProvides influencer marketing services including campaign strategy, creator partnerships, social media marketing, paid social advertising, and content production for brands, managing campaigns across…
Serves consumer and B2B brands, especially marketing teams in ecommerce, fashion, travel, beauty, luxury, gaming, food and beverage, and sports sectors.
Financial Health
HealthyHealthy
Location
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Computed from 5 filingsProvides digital performance marketing services including paid media management, SEO and local search optimisation, reputation and listings management, creative production, web development, and…
Serves enterprise and multi-location B2C brands needing localised customer acquisition across markets, including marketing leaders managing digital, search, media and location presence at scale.
Financial Health
WeakWeak
Location
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Computed from 5 filingsProvides digital PR, SEO and content marketing services for brands, particularly e‑commerce businesses. Develops media campaigns, content and link‑building strategies to secure press coverage,…
Serves ambitious online and e-commerce brands, including retailers and consumer businesses in fashion, food and drink, gardening, home interiors, technology, travel, automotive, financial, and health…
Financial Health
StrongStrong · Hiring · 9% CAGR over 4y
Location
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Computed from 3 filingsProvides digital marketing and creative services including SEO, PPC advertising, social media management, content and email marketing, public relations, video production, web design, e-commerce…
Serves businesses and organisations in Chester, Wirral, Cheshire and Liverpool, including local SMEs, property developers and community groups needing outsourced marketing support.
Financial Health
StableStable · -3% CAGR over 2y
Location
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Computed from 5 filingsProvides branding, graphic design and web design services for businesses, alongside digital marketing including search engine optimisation, pay‑per‑click advertising and social media marketing.…
Serves businesses and organisations seeking agency support, including SMEs and clients in healthcare, travel, IT services and publicly funded growth programmes.
Financial Health
DistressedDistressed · -14% CAGR over 4y
Location
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Computed from 2 filingsDevelops and executes digital engagement and fundraising campaigns for corporations, non-profits and advocacy groups. Services include campaign strategy, grassroots mobilisation, customer engagement,…
Serves corporations, nonprofits, advocacy organisations and political campaigns, with buyers including fundraising, communications, marketing, advocacy and digital teams.
Financial Health
StableStable · 6% CAGR over 1y
Location
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Computed from 3 filingsProvides marketing strategy, consultancy and campaign planning services. Delivers digital marketing including SEO, paid search, email marketing and conversion optimisation, alongside web design,…
Serves B2B companies of all sizes, primarily ambitious businesses in Hampshire and nationwide, including clients in sectors such as financial services, leisure and software.
Financial Health
HealthyHealthy · -9% CAGR over 2y
Location
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Computed from 4 filingsProvides e-commerce marketplace consulting and marketing services for consumer brands, including Amazon strategy, Seller and Vendor Central management, advertising (PPC and DSP), listing…
Serves consumer product brands, enterprises and ambitious start-ups selling through Amazon, TikTok Shop and Walmart, including beauty, pet, home, fashion, food, toys, supplements and fitness…
Financial Health
StableStable · -8% CAGR over 3y
Location
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Computed from 3 filingsProvides web design and digital marketing services for estate and letting agents and other property businesses, including lead‑generation websites, SEO, PPC advertising, social media marketing, email…
Serves independent estate and letting agencies, commercial property agents, property developers, construction firms, overseas agents, PropTech companies and professional service providers.
Financial Health
StrongStrong · Hiring · 18% CAGR over 2y
Location
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Computed from 3 filingsProvides digital marketing services including SEO outreach, link building, blogger outreach, and content production. Manages international publishing placements, digital PR, PPC advertising, and…
Serves international businesses and digital agencies as direct or white-label clients, with a particular focus on iGaming operators and affiliates, plus brands across major verticals such as travel,…
Financial Health
HealthyHealthy · -4% CAGR over 2y
Location
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Computed from 5 filingsProvides digital marketing and media services including paid media management, search engine optimisation, local search and listings management, creative production, web development, analytics, and…
Serves marketing teams at enterprise and multi-location brands, especially organisations that manage customer engagement across many sites and need coordinated national-to-local campaigns.
Financial Health
StrongStrong · Growing, Hiring · 7% CAGR over 4y
Location
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Computed from 5 filingsProvides digital marketing and design services including website design and development, gamification and marketing games, web marketing strategy, marketing automation, graphic design, branding,…
Serves businesses and brands in Scotland and worldwide, including organisations targeting international markets and teams engaging retail, events, education or language-travel audiences.
Financial Health
StrongStrong · Hiring · 32% CAGR over 4y
Location
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Computed from 4 filingsProvides digital marketing services for small businesses, including website design and planning, search engine optimisation, Google Ads pay‑per‑click management, social media marketing, analytics,…
Serves small businesses, primarily owners and marketing decision-makers, seeking more leads and sales through improved online visibility, advertising performance and website conversions.
Financial Health
StableStable · Hiring · 4% CAGR over 3y
Location
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Computed from 5 filingsProvides digital marketing services including search engine optimisation, paid search advertising, social media marketing, marketing automation and inbound marketing strategy. Also offers website…
Serves businesses, particularly SMEs seeking more online leads. Targets marketing and sales decision-makers, with visible focus on charities/non-profits and B2B SaaS companies through its website…
Financial Health
StableStable · Hiring · 4% CAGR over 4y
Location
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Computed from 5 filingsProvides marketing and creative services including branding and design, website design and development, content marketing, lead generation campaigns, market research, animated video production, and…
Serves UK businesses and public sector organisations seeking marketing support, including growth-focused organisations scaling toward or beyond eight-figure revenues, with emphasis on Lancashire,…
Financial Health
StableStable · -4% CAGR over 4y
Location
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Computed from 5 filingsProvides website design and development, including Shopify and WordPress builds, alongside branding, digital marketing, search engine optimisation, social media management, and print design. Produces…
Serves businesses and organisations globally across recruitment, technology, ecommerce, events and trade association sectors, typically marketing teams or business owners commissioning digital and…
Financial Health
DistressedDistressed · -7% CAGR over 4y
Location
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Computed from 5 filingsProvides marketing services for IT and technology companies, including marketing strategy development, outsourced marketing support, content creation, inbound marketing campaigns, and delivery of…
Serves B2B IT and technology companies, including businesses in the UK technology channel seeking specialist external marketing support, from strategy and content to outsourced marketing and campaign…
Financial Health
StrongStrong · Growing, Hiring · 4% CAGR over 4y
Location
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Computed from 5 filingsProvides digital marketing and web development services, including website design and build, SEO, pay‑per‑click advertising, content strategy, social media marketing, and e‑commerce development. Also…
Serves ambitious B2B and consumer brands, charities, healthcare organisations and large enterprises, with clients spanning hospitality, retail, finance, property and healthcare.
Financial Health
StrongStrong · Hiring · 73% CAGR over 4y
Location
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Computed from 5 filingsProvides digital marketing and medical communications services for pharmaceutical and healthcare organisations, including digital strategy, content and SEO, website and app development, e‑learning,…
Serves pharmaceutical companies and healthcare organisations, including digital, marketing, brand, product and medical communications teams seeking agency support for digital strategy and delivery.
Financial Health
DistressedDistressed · -66% CAGR over 4y
Location
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Computed from 5 filingsProvides digital marketing and creative agency services including brand strategy and identity, paid advertising on platforms such as Google and Meta, social media management, web design and…
Serves businesses and brands seeking digital marketing support, including organisations using Google, Meta, LinkedIn, Indeed, HubSpot and eCommerce channels. Targets marketing teams and business…
Financial Health
StableStable · Hiring · 52% CAGR over 4y
Location
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Computed from 5 filingsProvides creative marketing and branding services including marketing strategy, digital marketing, website design and development, publication design, animation and campaign production. Works with…
Serves B2B organisations and SMEs, including universities, wholesalers, retailers, telecoms firms, building products manufacturers and sports bodies, typically working with marketing managers.
Financial Health
WeakWeak · -67% CAGR over 4y
Location
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Computed from 5 filingsProvides digital marketing services for hotels, resorts and bed‑and‑breakfasts, including website design and development, online advertising campaigns, and data‑driven marketing strategies aimed at…
Serves B2B hospitality operators, including hotels, resorts, bed and breakfasts, and destination spas, targeting properties that market to travelers and rely on direct guest bookings.
Financial Health
HealthyHealthy · Hiring · 11% CAGR over 4y
Location
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Computed from 5 filingsProvides marketing services for the education sector, including campaign strategy, branding, digital marketing, advertising, and content production. Works with schools, multi-academy trusts, and…
Serves schools, multi-academy trusts and education-focused businesses, including marketing, admissions and recruitment teams, plus suppliers aiming to reach teachers, educators and school…
Financial Health
StableStable · 0% CAGR over 5y
Location
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Computed from 5 filingsProvides marketing services for gym owners and online fitness coaches, including advertising campaign management, lead generation systems, and growth programmes designed to attract new members and…
Sells to B2B fitness businesses, especially ambitious gym owners, independent gyms, personal training studios and online fitness coaches seeking member and revenue growth.
Financial Health
HealthyHealthy · Hiring · 63% CAGR over 4y
Location
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Computed from 5 filingsProvides marketing, public relations and communications services, including digital and social media campaigns, brand partnerships, events, and creative production. Works with media, entertainment,…
Serves B2B clients in media, television, entertainment, sport and news media, including consumer brands and cultural organisations involved in music, events, celebrity partnerships and launches.
Financial Health
HealthyHealthy · Hiring · 4% CAGR over 4y
Location
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Computed from 3 filingsProvides branding, employer branding, marketing and communications services for organisations. Develops brand strategy, campaigns and messaging, and delivers digital, social media and activation…
Serves B2B organisations and their marketing, communications and employer-brand leaders, including clients in infrastructure services, law, investment management and workplace services.
Financial Health
DistressedDistressed · -14% CAGR over 2y
Location
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Computed from 5 filingsProvides graphic design, branding and illustration services, video production, website design and development, and digital marketing support including PR, social media management, press releases and…
Serves businesses seeking external creative and marketing support, including brand owners and teams needing design, video, branding, digital and campaign resources tailored to individual client…
Financial Health
DistressedDistressed · -22% CAGR over 4y
Location
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Computed from 5 filingsProvides media planning and buying services for brands, managing advertising campaigns across channels such as TV and digital media. Develops media strategies, optimises campaigns, and supports…
Serves brand-side marketing teams at new and established businesses, including consumer brands in sectors such as fintech, beauty, sport, insurance and ecommerce.
Financial Health
StrongStrong · Hiring · 8% CAGR over 4y
Location
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Computed from 5 filingsArranges product placement and brand integration for clients within film, television, streaming, music videos and digital media. Also develops branded content partnerships, manages influencer…
Serves premium consumer brands and their marketing teams, plus entertainment producers, across film, TV, SVOD, music videos and digital content looking for brand partnerships.
Financial Health
StrongStrong · Hiring · 6% CAGR over 4y
Location
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Computed from 3 filingsProvides website design and development services, including e‑commerce sites built on Shopify, Magento, WooCommerce and WordPress. Also offers digital marketing services such as search engine…
Serves businesses and organisations, from local Liverpool firms to national and international ecommerce retailers, including fashion, ticketing, construction supply and consumer brands.
Financial Health
StrongStrong · Growing · 4% CAGR over 2y
Location
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Computed from 5 filingsProvides strategy and creative services for charities, universities and membership organisations, including branding, fundraising campaigns, digital communications and audience engagement initiatives.
Serves charities, universities, membership bodies and other purpose-led organisations, selling to marketing, fundraising and communications teams seeking audience engagement, campaigns and brand…
Financial Health
StableStable · Hiring · 3% CAGR over 4y
Location
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Computed from 3 filingsProvides B2B public relations and marketing communications services including media relations, content creation, social media management, communications strategy, advertising support, event…
Serves B2B technology brands, service businesses, event organisers and trade associations, with emphasis on print, signage, packaging, industrial, manufacturing and visual communications markets.
Financial Health
WeakWeak · Hiring · 11% CAGR over 2y
Location
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Computed from 3 filingsProvides marketing and design services including website design and development, advertising materials, brand identity, catalogue and packaging design, product and roomset photography, video…
Serves UK businesses and organisations, including manufacturers, engineering suppliers, consumer goods brands, furniture and bedding companies, and other firms requiring marketing and PR…
Financial Health
StableStable · 0% CAGR over 2y
Location
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Computed from 3 filingsProvides marketing and business consultancy services including brand strategy, advertising campaigns, PR, event management, and digital media planning. Produces visual and video advertising content,…
Serves businesses and organisations, including marketing teams and leadership across luxury goods, IT, finance, HR, banking, fashion, marketing, and print or digital publishing sectors.
Financial Health
DistressedDistressed
Location
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Computed from 4 filingsProvides web design and custom web development services, including WordPress and e‑commerce sites, alongside digital marketing, business consultancy, website hosting, and ongoing website support for…
Serves businesses and organisations of varying sizes, including public-sector/member bodies, ecommerce brands, professional services firms and project-led companies seeking agency support for their…
Financial Health
HealthyHealthy · 0% CAGR over 3y
Location
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Computed from 3 filingsDesigns, develops and manages AI‑enhanced digital projects including cloud software applications, websites, and iOS/Android mobile apps. Provides digital marketing campaigns, UI/UX and branding…
Sells primarily to businesses needing digital transformation, marketing and software projects, especially market-leading brands. Also serves elite sports players and clubs, and business clients…
Financial Health
StableStable · -4% CAGR over 2y
Location
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Computed from 5 filingsProvides public relations and communications consultancy for consumer and B2B organisations. Services include PR strategy, media relations, digital PR, branding, content marketing, website and design…
Serves consumer and B2B organisations nationally, including clients in travel and tourism, retail and lifestyle, built environment, technology, professional services, manufacturing and R&D.
Financial Health
StableStable · -6% CAGR over 5y
Location
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Computed from 5 filingsProvides digital agency services including eCommerce website development, online booking systems, custom software and AI solutions, plus lead generation and digital marketing. Also integrates…
Serves B2B organisations and eCommerce brands seeking digital growth, including companies with consumer, corporate and trade customer channels, online booking needs, and lead-generation priorities.
Financial Health
StableStable · 2% CAGR over 5y
Location
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Computed from 5 filingsDesigns and develops Shopify and Shopify Plus ecommerce websites. Provides store migrations, custom theme development, Shopify app development, systems integrations, SEO, conversion rate…
Serves ecommerce brands and Shopify/Shopify Plus merchants, including DTC and B2B retailers seeking online store growth, migrations, subscriptions, internationalisation, and email marketing support.
Financial Health
StrongStrong · Hiring · 25% CAGR over 4y
Location
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Computed from 3 filingsProvides public relations and strategic communications services including brand development, crisis communications, media relations and digital communications. Works with organisations on reputation…
Serves B2B and organisational clients, especially ambitious, entrepreneurial businesses in energy, infrastructure, logistics, pharmaceuticals, food production, housing and hospitality, plus public…
Financial Health
WeakWeak · -6% CAGR over 2y
Location
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Computed from 5 filingsProvides B2B telemarketing services including outbound cold calling, appointment setting, lead generation, customer surveys, database enrichment, list building, and market research. Supports sales…
Serves B2B clients from small local businesses to large international organisations, including accountancy, construction, engineering, financial services, IT, manufacturing, telecoms, training,…
Financial Health
DistressedDistressed · -69% CAGR over 4y
Location
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Computed from 5 filingsProvides public relations and communications services for maritime, offshore energy and logistics companies, including brand management, PR strategy, content creation, digital marketing, event…
Serves B2B organisations and executives in the global maritime, offshore energy and logistics sectors, including shipping, marine insurance, classification, shipbuilding, connectivity and offshore…
Financial Health
StableStable · Hiring · 3% CAGR over 4y
Location
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Computed from 4 filingsProvides public relations and communications consultancy for hotels and event venues. Services include brand positioning, media relations, storytelling, strategic promotion and crisis communications…
Serves B2B clients in the hospitality and events sector, particularly hotels, event venues and related businesses seeking communications, PR, reputation and positioning support.
Financial Health
StableStable · Hiring · 10% CAGR over 3y
Location
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Computed from 5 filingsProvides sponsorship strategy and public relations consultancy. Plans and delivers communications campaigns, brand launches and partnerships for clients in sectors including arts, luxury, design,…
Serves B2B marketing and leadership teams in arts, luxury, design, property, destinations, hospitality and visitor attractions seeking sponsorship and public relations support.
Financial Health
HealthyHealthy · -18% CAGR over 4y
Location
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Computed from 3 filingsProvides marketing communications services including video production, event organisation, audio production, and visual design. Develops and delivers communication content for online platforms,…
Targets businesses and their marketing or internal communications teams seeking agency support for customer and employee engagement across video, events, audio, web and design projects.
Financial Health
StableStable · Hiring · 15% CAGR over 2y
Location
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Computed from 5 filingsProvides branding and graphic design services, creating brand identities and communications across print, digital and environmental media. Works on visual identity, messaging, websites, and marketing…
Serves B2B, public-sector and non-profit organisations, especially life sciences bodies, research institutes, trade associations, local business districts, foundations and sustainability initiatives.
Financial Health
DistressedDistressed · -68% CAGR over 4y
Location
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Computed from 5 filingsProvides strategic communications services including public relations, public affairs, crisis management, media relations and digital communications. Also offers political and business analysis,…
Serves B2B clients ranging from major corporates to start-ups, especially organisations exposed to political, public affairs, reputation or crisis issues in the UK.
Financial Health
WeakWeak
Location
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Computed from 4 filingsDesigns and builds exhibition stands and branded environments, and provides event management services including planning, production and on‑site delivery for corporate events, exhibitions and themed…
Serves B2B organisations needing exhibition, event and PR support, including pharmaceutical companies, global distributors and technology or risk-management firms with sales, marketing and…
Financial Health
WeakWeak · -7% CAGR over 3y
Location
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Computed from 5 filingsProvides creative production services including product and model photography, image retouching, colour management and catalogue production. Develops workflow, digital asset management and product…
Serves B2B retail and consumer brands needing multi-channel marketing and product content, especially e-commerce, catalogue and publishing teams. Targets brands producing print, online, DOOH and…
Financial Health
WeakWeak · -16% CAGR over 4y
Location
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Computed from 5 filingsProvides B2B direct mail and mailing fulfilment services, including preparing, packaging and dispatching letters, literature, samples, catalogues and promotional items. Also handles campaign…
Serves B2B organisations and marketing teams needing outsourced direct mail, literature, sample and document dispatch, including firms with repeat or ad-hoc mailing projects.
Financial Health
StrongStrong · Growing, Hiring · 11% CAGR over 4y
Location
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How AddThis 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. marketing agency 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 marketing agency 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.
AddThis is a trademark of its respective owner. Firmbase is not affiliated with, sponsored by, or endorsed by the trademark owner.
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Frequently asked questions
How many UK marketing agency companies use AddThis?
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How is AddThis usage detected?
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