Companies Using AddThis in London: 384 Active Firms (2026)
Companies running social sharing and analytics tags use website widgets to encourage content sharing and measure engagement, across London boroughs.
Adoption tends to sit with marketing, ecommerce, audience-development and web-operations teams, not with core engineering alone. The tag is a relatively small part of the website stack: it adds share buttons, captures engagement signals and feeds campaign reporting, so buyers usually care about attribution, consent handling and page-weight rather than deep workflow change. Companies running this kind of tag tend to have repeatable digital acquisition, published content or catalogue pages, and enough traffic for audience measurement to matter. Property, wholesale, trades, ecommerce and construction operators appear often, which points to practical lead generation rather than pure media use.
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London has 384 actively trading companies running this social-sharing and engagement-analytics tag, making it a visible but not mass-market adoption signal among website operators in the capital. Reported employment across the cohort totals 1,937 people, so the footprint is concentrated in smaller operating teams rather than large enterprise estates. The typical adopter looks commercial rather than experimental: it uses a public website for lead generation, audience measurement or catalogue browsing, and the tag usually sits alongside wider marketing infrastructure rather than being the main digital product.
Cookie consent is the practical constraint for website operators using social-sharing and engagement-measurement tags. ICO guidance under PECR says visitors must be told that cookies or similar technologies are present, what they do and why they are used, before storage or access takes place on a device. Non-essential technologies should not fire on a homepage before consent, and consent needs a clear positive action; PECR still applies where identifiers are anonymous. Where the same activity involves personal data, UK GDPR and Data Protection Act duties also sit in scope. IAB UK provides market context through its research on digital advertising spend, but compliance remains an operator-level responsibility.
Adoption appears likely to become more selective rather than broader by default. Consent banners, browser restrictions and tag-management discipline are pushing marketing teams to justify each external script, especially where audience data is used for campaign reporting. Smaller firms may retain share widgets where they support visible lead generation, while more mature web teams tend to consolidate analytics, consent and performance monitoring around fewer suppliers. The cohort therefore looks exposed to gradual rationalisation: tags that prove attribution value stay in place, while low-usage widgets are more likely to be removed during website rebuilds or privacy reviews.
Adoption by company size
Adoption of AddThis rises with company size across the trading companies in this cohort. 0.1% of the 532,485 companies with under 10 employees run AddThis (280 detected). 0.6% of the 15,364 companies with 10–50 employees run AddThis (88 detected). 0.9% of the 1,763 companies with over 50 employees run AddThis (16 detected). That is a 0.8% gap between the over 50 employees and under 10 employees bands.
384
Active firms
2026
22
Above £5M turnover
Trading firms
5
Median headcount
Filed accounts
850
Verified contacts
Across this cohort
Top companies using AddThis in London
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 filingsPublishes sports industry news, analysis and reports through its online media platform. Produces podcasts, newsletters and market research, and organises conferences and events, alongside…
Serves B2B professionals and decision makers across the international sports industry, including rights holders, broadcasters, sponsors, agencies, investors, technology providers and event organisers.
Financial Health
StrongStrong · Growing, Hiring · 8% CAGR over 4y
Location
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Computed from 5 filingsOperates and manages a portfolio of hotels and resorts providing accommodation, restaurants, meeting and event venues, and guest services for business and leisure travellers. Also runs a customer…
Sells to business and leisure travellers worldwide, including hotel guests booking direct, loyalty programme members, event and venue bookers, and diners seeking hotel restaurants and longer-stay…
Financial Health
HealthyHealthy · Hiring · 68% CAGR over 4y
Location
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Computed from 5 filingsOperates an online platform for the art market, providing artwork listings, online auctions, gallery and auction house directories, a database of auction price results, and news and analysis on…
Serves art collectors, galleries, auction houses and art market professionals worldwide, including buyers, sellers and researchers in fine art, design and decorative art markets.
Financial Health
StrongStrong · Hiring · 36% 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 filingsOperates an online marketplace for discovering and booking event venues worldwide. Provides venue search tools, event sourcing and booking management software for businesses, and marketing listings…
Serves businesses, procurement teams, office teams and professional event organisers sourcing venues, alongside consumers planning private events such as weddings or parties. Also targets venue…
Financial Health
StrongStrong · Hiring · 9% 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 5 filingsDesigns and operates immersive live‑action gaming and entertainment attractions. Productions include The Crystal Maze Experience, Chaos Karts racing, Tomb Raider LIVE, and PAC‑MAN Live, offering…
Serves UK leisure consumers, social groups and fans of branded real-world gaming experiences, with locations in London and Manchester, and also targets corporate teams seeking group outings or…
Financial Health
HealthyHealthy · Hiring · 32% CAGR over 4y
Location
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Computed from 5 filingsOperates an online publication covering legal industry news, analysis and commentary, and provides career resources for aspiring lawyers, including law firm profiles, training contract and…
Serves aspiring lawyers, law students and graduates seeking careers information, alongside law firms, chambers and law schools using its fairs, profiles, events and recruitment channels.
Financial Health
HealthyHealthy · -4% CAGR over 4y
Location
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Computed from 5 filingsOrganises guided group and self-guided adventure holidays worldwide, including trekking, cycling, mountaineering, wildlife and cultural trips. Arranges itineraries, logistics and local leaders for…
Sells to consumers and families seeking active adventure holidays, including walkers, trekkers, cyclists, mountaineers, wildlife travellers and polar explorers, across a wide range of international…
Financial Health
HealthyHealthy · 2% CAGR over 4y
Location
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Operates a portfolio of hotel brands providing accommodation, restaurants, bars and meeting and event venues. Manages full‑service hotels with guest rooms and conference facilities for business…
Serves leisure and business travellers, corporate bookers, event planners and private guests seeking hotel stays, meetings, events, dining and venue hire in London and selected English locations.
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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 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 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 4 filingsProvides sales, consulting and software development services for financial markets technology, supporting platforms for portfolio management, trading, risk management and analytics used by asset…
Serves buy- and sell-side financial institutions, including asset and alternative asset managers, asset owners, wealth managers, private banks, prime brokers, risk managers and trading desks.
Financial Health
StableStable · -57% CAGR over 5y
Location
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Computed from 3 filingsAcquires land and property, develops residential and mixed‑use real estate projects, and provides property investment, sales, lettings, and asset management services. Manages build‑to‑rent schemes…
Serves property investors, homebuyers, tenants and landlords seeking residential and commercial property in London and commuter-belt locations, including new-build homes, lettings and build-to-rent…
Financial Health
HealthyHealthy · 0% CAGR over 2y
Location
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Computed from 5 filingsOperates an online platform listing private healthcare specialists, surgeons, physicians, clinics, and hospitals. Enables users to search by specialty or name, compare professionals, request quotes,…
Serves private patients in the UK and overseas seeking Harley Street specialists, clinics, second opinions or video consultations, and sells listing/advertising options to private doctors and clinics.
Financial Health
StrongStrong · Growing, Hiring · 41% CAGR over 4y
Location
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Computed from 5 filingsProvides residential estate agency services including property sales, lettings, and property management. Markets homes for sale and rent, assists buyers and tenants with property searches, and…
Serves homeowners selling property, landlords letting homes, and buyers and tenants searching for residential property in South West, South East and Central London.
Financial Health
StrongStrong · Hiring · 28% 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 filingsDevelops cloud-based software for managing marketing activation and sourcing processes. Platform supports supplier sourcing, RFQ/RFP management, procurement workflows, e‑commerce ordering of POS and…
Serves B2B brand marketing and procurement teams, marketing service providers and agencies, particularly multinational brands managing point-of-sale, promotional, premiums and packaging activation…
Financial Health
HealthyHealthy · Hiring · 9% CAGR over 2y
Location
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Computed from 4 filingsOperates an online investment platform that enables individuals to invest in private companies and startups, participate in equity crowdfunding offerings, and buy or sell secondary shares in…
Serves retail, accredited and institutional investors seeking private-market startup opportunities, plus private companies and shareholders seeking capital raising or secondary liquidity.
Financial Health
StrongStrong · Hiring · 31% CAGR over 3y
Location
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Computed from 5 filingsProvides residential property sales and lettings services along with property and asset management for landlords and investors. Conducts property valuations, markets homes for sale or rent, sources…
Serves residential property owners, landlords, investors, buyers and tenants in Central London’s prime property market, including clients with sales, lettings and portfolio management needs.
Financial Health
HealthyHealthy · Hiring · 11% CAGR over 4y
Location
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Computed from 5 filingsProvides strategic communications, marketing and public affairs services. Advises entrepreneurs, investors and organisations on messaging, leadership communications and campaigns, and supports media…
Serves mission-driven entrepreneurs, investors, philanthropists, business leaders and innovation-led organisations, especially in technology sectors such as AI, fintech and quantum computing.
Financial Health
StableStable · -69% CAGR over 4y
Location
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Computed from 4 filingsDevelops a cloud-based integration platform that connects applications, data sources, and APIs. Provides tools for data integration, ETL/ELT, API management, and workflow automation, with pre-built…
Sells to enterprise IT, data and business teams across manufacturing, retail, financial services and higher education, plus ISVs, MSPs and OEM/embedded providers.
Financial Health
HealthyHealthy · Hiring · 39% CAGR over 3y
Location
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Computed from 5 filingsProvides an online platform for building and hosting websites and e‑commerce stores. Offers templates, drag‑and‑drop editing, product listings, payment gateway integration, order management, blogging…
Serves small businesses, independent brands, creators and retailers seeking an online store, branded website, portfolio or promotional web presence for direct-to-consumer ecommerce.
Financial Health
StableStable · 0% CAGR over 4y
Location
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Computed from 5 filingsOrganises industry conferences and forums focused on industrial minerals and related sectors. Publishes market commentary, articles, presentations, and research reports, and provides information…
Serves B2B professionals and organisations across the industrial minerals supply chain, including producers, processors, recyclers, traders, analysts and end users in refractories, chemicals, steel…
Financial Health
StableStable · -13% CAGR over 5y
Location
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Computed from 4 filingsProduces and sells dog food products, including grain‑free meals, wet tray food, and recipes with meat, fish, and vegetables. Also offers dog treats and nutritional products through an online store…
Sells directly to UK dog owners and dog parents, including those with puppies, working dogs, or dogs needing grain-free and wheat/gluten-free diets.
Financial Health
StrongStrong · Hiring · 115% CAGR over 3y
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 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 4 filingsOperates an online shop selling cookware and kitchenware, including stainless steel and non‑stick pots and pans, utensils, cutlery, glassware, plastic containers, baking items, catering supplies, and…
Sells online to UK consumers and small catering or hospitality buyers seeking cookware, kitchenware, tableware, cutlery, cleaning and disposable household products.
Financial Health
HealthyHealthy · 0% CAGR over 3y
Location
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Computed from 5 filingsOperates an online recruitment platform that connects graduates with entry‑level roles at startups. Lists job vacancies across sectors and allows candidates to create profiles and apply, while…
Serves a mix of recent graduates seeking London or remote startup roles and employers hiring entry-level talent, including startups and agencies across sales, marketing, PR, data, fintech,…
Financial Health
StableStable · Hiring · 5% CAGR over 4y
Location
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Computed from 5 filingsOperates an online supermarket selling groceries and household goods, including drinks, canned foods, rice, pasta, spices, snacks, bakery items, fresh produce, health and personal care products, and…
Serves consumers and small catering buyers seeking online supermarket groceries, household essentials, and health and personal care items.
Financial Health
StrongStrong · Growing, Hiring · 5% CAGR over 4y
Location
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Computed from 5 filingsProvides technology recruitment services, sourcing and placing professionals such as software engineers, data scientists, cloud and DevOps specialists, product managers, and technology executives for…
Serves technology professionals and B2B hiring teams at start-ups and enterprise organisations across European tech hubs, focused on software, data, AI, cloud, product and technology leadership roles.
Financial Health
StrongStrong · -2% CAGR over 4y
Location
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Computed from 3 filingsProvides recruitment services for advertising, public relations, graphic design and digital marketing roles, placing candidates in permanent and temporary positions across levels from junior staff to…
Serves advertising, PR, graphic design and digital marketing employers seeking staff, alongside candidates from junior through CEO and board level looking for permanent or temporary roles.
Financial Health
HealthyHealthy · Growing · 0% CAGR over 2y
Location
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Computed from 5 filingsProvides residential estate agency services including property sales, lettings, and short‑term rentals. Markets homes, arranges tenancies, offers property valuations, and delivers property management…
Serves homeowners, landlords, property buyers and tenants looking to sell, let, buy or rent homes in Kensington, Notting Hill and North Kensington.
Financial Health
StrongStrong · Growing · 1% CAGR over 5y
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 5 filingsOperates a contemporary art gallery representing international artists. Organises gallery exhibitions and participates in art fairs, and produces publications, videos and other materials related to…
Serves contemporary art collectors, museums, curators and art institutions engaging with represented artists through gallery exhibitions, art fairs and publications in the international contemporary…
Financial Health
StrongStrong · Growing, Hiring · 16% CAGR over 4y
Location
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Computed from 5 filingsOperates a theatre venue presenting stage productions including plays, musicals and special events. Also runs an on‑site bar and kitchen, and offers venue hire for performances, private functions and…
Serves theatre-goers and live performance audiences in London, plus visitors seeking a late-night bar and organisations or producers looking to hire a small theatre venue.
Financial Health
StrongStrong · Hiring · 11% CAGR over 4y
Location
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Computed from 5 filingsDevelops and operates online education platforms providing software, courses and learning resources for maths and English qualifications, including GCSE and Functional Skills. Offers diagnostic…
Serves learners, teachers, FE colleges, apprenticeship and training providers, alternative provision settings, tuition agencies and home-schooling families seeking maths and English GCSE or…
Financial Health
HealthyHealthy · Hiring · 37% CAGR over 4y
Location
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Computed from 3 filingsRepresents and manages professional speakers, arranging keynote presentations, webinars, masterclasses, and event hosting. Provides speaker booking and management services for conferences and…
Serves businesses, conference organisers and professional event teams seeking speakers for audiences across sectors including finance, technology, real estate, education, health, retail and…
Financial Health
HealthyHealthy · -86% CAGR over 2y
Location
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Computed from 5 filingsProvides commercial design and printing services, including lithographic and digital print, pre‑press and finishing. Produces materials such as brochures, books, catalogues, leaflets, posters,…
Sells to businesses and organisations needing commercial design and print services, including blue-chip companies and other clients ordering reports, brochures, packaging, property materials, menus,…
Financial Health
HealthyHealthy · -4% CAGR over 4y
Location
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Computed from 5 filingsProvides brokerage, consulting and development services for data centre and digital infrastructure real estate. Markets available data centre facilities and development sites, advises on…
Serves B2B customers in digital infrastructure, including hyperscale/cloud and AI technology companies, data centre operators, real estate investors, developers and enterprise occupiers.
Financial Health
HealthyHealthy · Hiring · 119% CAGR over 4y
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 5 filingsOperates a motor dealership selling used cars from multiple manufacturers. Provides vehicle sourcing, part exchange and car purchasing, as well as servicing, MOT testing, body repairs, export sales…
Serves private motorists in Greater London, especially buyers of pre-owned cars and existing vehicle owners needing servicing, MOT or bodyshop support, with some provision for export customers.
Financial Health
HealthyHealthy · Growing · 0% CAGR over 4y
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 5 filingsProvides branding and marketing communications services, including brand strategy, naming, visual identity design, advertising campaigns, content, digital and experiential marketing, and…
Serves businesses ranging from start-ups to established brands, selling to entrepreneurs, business leaders and innovators across sectors including legal, data, media, consumer brands, banking and…
Financial Health
WeakWeak · 0% CAGR over 4y
Location
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Computed from 4 filingsDevelops and operates digital education platforms that provide schools, universities, governments and businesses with access to ebooks, textbooks and learning tools, including digital libraries,…
Serves schools, higher education institutions, governments, publishers, corporates and NGOs across Africa and beyond, plus families and individual readers seeking educational books and digital…
Financial Health
StrongStrong · -91% CAGR over 2y
Location
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Computed from 5 filingsOperates an online retail store selling health supplements, vitamins, herbal remedies and natural skincare products. Offers products including amino acids, probiotics, essential fatty acids,…
Serves UK consumers shopping online for health and wellness products, including adults, parents, men’s grooming buyers, skincare shoppers, and people seeking supplements for specific conditions or…
Financial Health
StableStable · -4% CAGR over 4y
Location
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Computed from 4 filingsOnline retailer of printer consumables including ink cartridges, toner cartridges and label tapes, offering branded, compatible and remanufactured products for various printer models. Also sells…
Serves UK and European consumers and organisations, including households, students, business account holders, schools and local authorities that buy printer supplies online.
Financial Health
StableStable · -10% CAGR over 5y
Location
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Provides legal services including corporate and finance, dispute resolution, regulatory advice, and intellectual property. Advises businesses, financial institutions, and governments across sectors…
Serves multinational businesses, financial institutions, insurers, private capital investors, and public sector bodies in regulated sectors including life sciences, energy, technology, transport,…
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Key facts
About 5% of the trading cohort reports turnover above £5M (22 of 384 firms) — the rest sits below that revenue band.
4% of the cohort was incorporated since 2022 (18 firms), so a sizeable share is in its first few filing cycles.
46.1% of the cohort also run a content-management platform, while 44.3% use a content-delivery or web-security layer.
37.2% of the cohort also run a web analytics tag and 30.2% run a tag-management container, making consent settings a multi-tag problem for many website operators.
Real Estate & Property accounts for 20.1% of overlapping sector tags, followed by Wholesale & Distribution at 10.4%; Field Services & Trades, E-commerce and Construction are each 8.1%.
The ICO says PECR regulation 6 requires cookie and similar-technology users to explain what is present, what it does and why, and obtain consent before storing or accessing information on a device.
The 2024 UK Business Data Survey reported that 68% of UK businesses had a website and 77% handled digitised data of any type.
What else do AddThis users run?
Share of the 384 AddThis-running UK companies where each technology was also detected. As of June 2026.
Who runs AddThis in the UK?
By sector
Sectors overlap, so shares need not sum to 100%.
By financial health
From filed accounts; firms with fewer than two filings show as insufficient history.
5
Median headcount
£506.4K
Median UK turnover
5.7%
Above £5M turnover
18
Incorporated since 2022
850 verified decision-maker contacts
across these 384 companies, with emails available in Firmbase. Filter by role, seniority and stack.
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.
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.
AddThis elsewhere
Frequently asked questions
How many companies in London use AddThis?
How is AddThis usage detected?
What kinds of companies use AddThis in London?
What do AddThis users in London also run?
How fresh is this data?
Can I get contact details for these companies?
Search 384 UK companies by the social media technology they run.
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