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Companies Using Google Optimize in the UK: 251 Active Firms (2026)
Companies running website testing and personalisation tools use visitor data to improve conversion and digital journeys across the UK.
Adoption usually sits with growth, ecommerce, product analytics and performance-marketing teams rather than the IT department alone. The tooling supports variant allocation, behavioural measurement and controlled changes to web journeys, so it tends to signal a company with measurable online acquisition or sales funnels. Buyers are usually upper-SME, mid-market or enterprise operators with enough traffic for tests to finish, internal analysts who can read results, and commercial owners able to act on them. Engagements are less about a single script than a working routine of tagging, consent management, landing-page iteration and funnel reporting.
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The UK adoption picture is fairly narrow: 251 actively trading companies are running this testing and personalisation stack on public websites. That points to a specialist cohort rather than a mass-market web technology, with usage concentrated among digital businesses and operators where online journeys have commercial value. Reported employment across these adopters totals 2,260 people, suggesting many users are lean teams rather than large corporate departments. For researchers, that makes the list useful for finding companies with web experimentation intent, but less useful as a proxy for the whole UK digital economy.
Website experimentation sits close to privacy, analytics and marketing-governance questions because tests often depend on behavioural signals, audience rules and tags added through shared web-management tools. UK adopters therefore need clear internal ownership for consent wording, tag deployment, visitor segmentation and retention of test results. Procurement tends to focus less on licence value than on who can approve scripts, prevent tests altering regulated claims, and keep analytics implementation consistent across marketing, product and development teams. Where the stack touches ecommerce or subscription flows, legal and customer-support teams may also need visibility before variants go live.
Adoption appears likely to become more selective rather than simply broader. Companies with mature acquisition funnels still have reasons to test copy, layouts and journeys, but teams with lighter traffic often struggle to justify a formal experimentation workflow. The market also tends to favour bundled analytics, tag-management and personalisation platforms, which can reduce the role of standalone testing tools. For this cohort, the more durable pattern is likely to be operational: tighter consent processes, more product-led ownership, and fewer experiments launched without a clear commercial decision attached.
251
Active firms
2026
18
Above £5M turnover
Trading firms
5
Median headcount
Filed accounts
645
Verified contacts
Across this cohort
Key facts
About 7% of the trading cohort reports turnover above £5M (18 of 251 firms) — the rest sits below that revenue band.
7% of the cohort was incorporated since 2022 (19 firms), so a sizeable share is in its first few filing cycles.
81.7% (205) also run a browser-side tag-management tool, placing testing inside a wider measurement stack rather than as a standalone site change.
62.2% (156) also use an edge security and performance layer, while 47.0% (118) carry bot-protection tooling.
SaaS is the largest sector tag at 19.1% (48), ahead of Sport & Leisure at 10.0% (25) and E-commerce at 9.6% (24).
Financial health is mixed: 23.9% (60) sit in the stable band, 19.9% (50) are weak and 9.2% (23) are distressed.
46.6% (117) also run a content-management system and 29.1% (73) carry an SEO plug-in, suggesting a content-led testing surface for part of the cohort.
What else do Google Optimize users run?
Share of the 251 Google Optimize-running UK companies where each technology was also detected. As of June 2026.
Who runs Google Optimize 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
£590.9k
Median UK turnover
7.2%
Above £5M turnover
19
Incorporated since 2022
645 verified decision-maker contacts
across these 251 companies, with emails available in Firmbase. Filter by role, seniority and stack.
Top UK companies using Google Optimize
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.
HOSTELWORLD SERVICES LIMITED
Financial sub-scores
Computed from 2 filingsProvides management, marketing and support services for an online hostel booking platform. Supports the listing, promotion and reservation of backpacker hostels worldwide, and operates digital…
Serves B2C budget travellers, backpackers and solo travellers worldwide, alongside B2B hostel and budget accommodation operators seeking access to those travellers.
Financial Health
StrongStrong · Profitable · -12% CAGR over 1y
Location
Financial sub-scores
Computed from 5 filingsOperates an online platform for residential property transactions, enabling users to search for homes for sale or rent and access related services including estate agent listings, mortgage brokerage,…
Serves UK residential property buyers, sellers, renters and homeowners, including people needing mortgages, conveyancing and estate-agent support during a home move.
Financial Health
HealthyHealthy · Hiring · 42% CAGR over 4y
Location
Financial sub-scores
Computed from 3 filingsProvides a mobile app offering business current accounts integrated with accounting and tax tools for sole traders and freelancers. Includes invoicing, payment acceptance, automated transaction…
Serves UK sole traders, freelancers, self-employed people and small businesses; also targets accountants supporting small business clients.
Financial Health
StableStable · -7% CAGR over 2y
Location
Financial sub-scores
Computed from 5 filingsProvides online brokerage services and trading platforms enabling clients to trade financial instruments including forex, CFDs, physical stocks, indices, commodities, precious metals, ETFs and…
Sells to retail traders and investors worldwide seeking multi-asset online trading, and also serves professional clients, partners and institutional customers in financial markets.
Financial Health
StrongStrong
Location
QuestionPro
Financial sub-scores
Computed from 5 filingsProvides cloud-based survey and research software for creating, distributing and analysing online surveys. Platform includes tools for market research, customer and employee experience measurement,…
Serves B2B and public-sector teams running research, customer experience and employee experience programmes, including market research, CX and HR teams across gaming, automotive, education,…
Financial Health
StrongStrong · Hiring · 24% CAGR over 4y
Location
DOCKER (UK) LIMITED
Financial sub-scores
Computed from 5 filingsOperates an online retail store selling men’s and women’s clothing, including chinos, trousers, shirts, jackets, dresses and accessories. Offers branded apparel collections and seasonal styles…
Sells directly to UK retail consumers shopping online for men’s and women’s casual, office and everyday clothing, especially chinos, khakis, trousers, tops, outerwear and accessories.
Financial Health
StrongStrong · Hiring · 15% CAGR over 5y
Location
Swoop Finance Ltd
Financial sub-scores
Computed from 5 filingsOperates an online platform that matches businesses with funding options including loans, equity investment and grants. Provides comparison tools and applications for financial products such as asset…
Serves SMEs, startups and growing businesses seeking finance, alongside advisors, brokers, vendors and bookkeepers supporting business clients with funding needs.
Financial Health
StableStable · Hiring · 15% CAGR over 4y
Location
Financial sub-scores
Computed from 4 filingsProvides online fundraising and donation software for charities, including branded donation pages, fundraising campaign pages, event registration and ticketing, and tools for managing mass…
Serves charities and nonprofit fundraising teams, including organisations running digital donation campaigns, appeal pages, in-memory giving and mass participation events such as major UK challenge…
Financial Health
StableStable · 2% CAGR over 3y
Location
Nottingham Eye Surgery Ltd
Financial sub-scores
Computed from 5 filingsProvides private healthcare services including consultations, diagnostic tests and scans, and surgical treatments. Offers procedures across multiple specialties such as orthopaedics, cardiology,…
Serves private healthcare patients across the UK, including self-pay and insured individuals, plus employers seeking occupational health and healthcare professionals referring patients.
Financial Health
StrongStrong · Growing · 0% CAGR over 5y
Location
TAB 21 LIMITED
Financial sub-scores
Computed from 5 filingsDesigns and sells protective cases and accessories for consumer electronics, including smartphones, tablets and laptops. Product range includes impact‑resistant phone cases, screen protectors and…
Sells primarily to consumers buying protective cases, screen protectors and accessories for Apple, Samsung, Google and Motorola devices, including iPhone, Galaxy, Pixel, MacBook and iPad owners.
Financial Health
StableStable · -10% CAGR over 4y
Location
Smart Money People Limited
Financial sub-scores
Computed from 5 filingsOperates an online platform where consumers read and submit reviews of financial products and providers including banking, insurance, credit cards, loans and mortgages. Publishes rankings, comparison…
Serves consumers researching financial products, alongside banks, insurers, lenders, brokers and other financial services businesses using customer reviews and insight.
Financial Health
WeakWeak · Hiring · 26% CAGR over 4y
Location
Financial sub-scores
Computed from 5 filingsProvides an online platform for photographers to store, manage and share photos and videos, build portfolio websites, create client galleries, and sell prints or digital downloads through integrated…
Serves photographers and visual creators, including professional photographers and small photography businesses that need paid plans to create, store, share and grow their visual work.
Financial Health
StableStable · -8% CAGR over 4y
Location
Financial sub-scores
Computed from 5 filingsProvides an online platform for event organisers to create listings, sell tickets, and distribute event information across a network of partner websites and calendars. Includes tools for ticketing,…
Serves event organisers and creators, including conference marketers, businesses and venues targeting local consumer audiences, plus media and website partners that publish event listings.
Financial Health
WeakWeak · Hiring · 15% CAGR over 4y
Location
New You Plan Limited
Financial sub-scores
Computed from 4 filingsSells very‑low‑calorie diet (VLCD) total food replacement products, including meal‑replacement shakes, soups, bars and snacks. Offers diet bundles and nutrition products through an online store and…
Sells direct to consumers in the UK and Ireland seeking total food replacement diet products, meal replacements and support for weight-loss plans.
Financial Health
HealthyHealthy · Hiring · 17% CAGR over 3y
Location
DATA POWERTOOLS LIMITED
Financial sub-scores
Computed from 3 filingsRetailer of power tools, hand tools, woodworking and metalworking machinery, accessories and consumables from brands such as DeWALT, Bosch and Makita. Sells cordless and corded tools, fixings,…
Serves a mix of trade and consumer buyers, including contractors, tradespeople, workshops, woodworkers, metalworkers and DIY users buying tools, machinery, accessories, workwear and spares online or…
Financial Health
StableStable · 0% CAGR over 2y
Location
Electrifying Limited
Financial sub-scores
Computed from 4 filingsPublishes online reviews, news, and buying guides about electric and hybrid vehicles. Provides comparisons of new and used EVs, advice on charging and ownership, calculators and tools, and links to…
Serves consumers and business users researching electric and hybrid vehicles, including private car buyers, used EV shoppers, company car drivers, salary-sacrifice employees and van buyers.
Financial Health
StableStable · -11% CAGR over 3y
Location
Financial sub-scores
Computed from 3 filingsDesigns and sells women’s clothing, footwear and accessories through an online retail platform. Product ranges include dresses, knitwear, denim, loungewear, shoes and items such as bags, scarves,…
Serves consumer shoppers, primarily women, buying casual fashion, footwear, accessories, gifts and lifestyle items online, including denim, knitwear, loungewear, workwear and seasonal collections.
Financial Health
HealthyHealthy · Hiring · 8% CAGR over 3y
Location
Caspian Assured Ltd
Financial sub-scores
Computed from 5 filingsProvides life insurance brokerage services, comparing policies from multiple UK insurers. Advises individuals and businesses on cover including term life insurance, mortgage protection, critical…
Serves UK consumers, families, parents, over-50s and self-employed people, alongside business owners and employers seeking personal, mortgage, income, key person, shareholder or employee protection…
Financial Health
StrongStrong · Profitable, Growing, Hiring · 7% CAGR over 4y
Location
WP Engine (UK) Limited
Financial sub-scores
Computed from 3 filingsProvides managed hosting platforms for WordPress websites and applications, including site management, security, performance optimisation, developer tools, and infrastructure for e‑commerce, media,…
Serves B2B customers including enterprise digital teams, creative agencies, developers, small businesses, ecommerce retailers and media/newsroom organisations using WordPress websites and…
Financial Health
StrongStrong · Profitable, Growing · 4% CAGR over 2y
Location
Perfect Stays Limited
Financial sub-scores
Computed from 3 filingsProvides a portfolio of self‑catering holiday homes available for short‑term rental. Offers online property search and booking, concierge services for guests, and property management support for…
Serves consumers, especially families and groups seeking luxury self-catering holiday homes and short breaks in Cornwall, Devon and Somerset.
Financial Health
HealthyHealthy · Growing · 2% CAGR over 2y
Location
BODY PROJECT SYSTEMS LTD
Financial sub-scores
Computed from 5 filingsProvides online fitness programmes featuring on‑demand home workout videos including HIIT, resistance, pilates and boxing sessions. Offers structured training plans, mobile app access, nutrition…
Serves individual consumers worldwide seeking at-home fitness support, including beginners, all ages and fitness levels, and people wanting low-impact programmes for fat loss and muscle tone.
Financial Health
HealthyHealthy · Hiring · 11% CAGR over 4y
Location
7DAYS PERFORMANCE LIMITED
Financial sub-scores
Computed from 5 filingsOperates an online prize competition platform offering draws to win cars and other vehicles. Participants enter through paid online tickets or free postal entries, with winners selected in scheduled…
Targets consumers interested in online car prize competitions, including entrants using paid website entry or postal entry routes, with engagement around live winner announcements on Facebook.
Financial Health
StableStable · -51% CAGR over 4y
Location
Hertfordshire LTA (Sponsorship) Limited
Financial sub-scores
Computed from 5 filingsOperates online platforms and programmes supporting tennis participation, including court and lesson booking services, coaching and venue management tools, youth training schemes, and organisation of…
Serves consumers across Britain, including adults, children, parents and players of all abilities seeking tennis or padel participation, coaching, court bookings and competitions. Also targets…
Financial Health
StrongStrong
Location
MORAN GYNAECOLOGY SERVICES LIMITED
Financial sub-scores
Computed from 5 filingsOperates private healthcare facilities providing medical consultations, diagnostic tests, imaging and surgical treatments. Services cover multiple specialties including orthopaedics, cardiology,…
Serves self-paying and insured private healthcare patients across the UK, plus employers seeking occupational health services and healthcare professionals using its hospital network.
Financial Health
HealthyHealthy · -68% CAGR over 4y
Location
Skin Glossary Ltd
Financial sub-scores
Computed from 5 filingsOperates an online skincare consultation and recommendation service. Users complete skin surveys, upload images, and may join video consultations to receive personalised skincare advice and purchase…
Serves consumers seeking personalised skincare guidance, including people completing online skin surveys, uploading skin images, booking video consultations, and purchasing skincare-related services…
Financial Health
StableStable · Hiring · 24% CAGR over 4y
Location
POWERED NOW LTD
Financial sub-scores
Computed from 5 filingsDevelops cloud-based job management software for trade businesses, enabling creation of quotes and invoices, scheduling of jobs and engineers, time and expense tracking, customer portals, and…
Serves UK trade businesses and contractors, including plumbers, electricians, heating and gas engineers, HVAC firms, builders, landscapers, pest control providers, roofers and property maintenance…
Financial Health
StableStable · 2% CAGR over 4y
Location
Financial sub-scores
Computed from 5 filingsProvides cloud-based social media management software that allows businesses and agencies to schedule and publish posts, manage content, monitor messages and comments, collaborate in teams, and…
Serves marketing teams and social media managers at agencies, small businesses, franchises, enterprises, higher education institutions and real estate firms managing client or brand social channels.
Financial Health
HealthyHealthy · Hiring · 3% CAGR over 5y
Location
Financial sub-scores
Computed from 5 filingsProvides cloud-based accounts payable automation software, including purchase order management, AI/OCR invoice processing, approval workflows, supplier payments, expense management and reporting,…
Serves finance and accounts payable teams in SMEs, charities, education providers, care and hospice organisations, town and parish councils, manufacturers, construction firms, asset managers, leisure…
Financial Health
HealthyHealthy · Hiring · 20% CAGR over 4y
Location
WATTS MARKETING LIMITED
Financial sub-scores
Computed from 5 filingsProvides lead generation and appointment setting services for home improvement installers. Generates inbound enquiries and transfers sales appointments for products including double glazing, solar PV…
Serves UK home improvement providers and installers, including double glazing, solar PV, heat pump, insulation, boiler and conservatory roof companies seeking exclusive sales appointments.
Financial Health
StrongStrong
Location
Visual Education Limited
Financial sub-scores
Computed from 3 filingsOperates a subscription-based online learning platform providing video classes, live workshops, and guided projects in photography, lighting, 3D CGI, and visual arts. Offers structured courses,…
Serves aspiring and professional photographers, visual artists, CGI artists and art learners, plus education or training organisations needing multi-user access to creative skills courses.
Financial Health
StrongStrong
Location
Invest Tech Ltd
Financial sub-scores
Computed from 4 filingsProvides online technical analysis tools, stock screening and research reports for global equities and indices. Platform delivers trend analysis, trading signals and market insights for investors…
Serves retail investors and traders seeking technical analysis and stock-picking insights across US and international equities, indices, ETFs, currencies, commodities and cryptocurrencies.
Financial Health
StrongStrong · Growing, Hiring · 10% CAGR over 3y
Location
Financial sub-scores
Computed from 5 filingsProvides a mobile engagement platform for app developers and marketers, offering mobile and web push notifications, in‑app messaging, deferred deep links, geotargeted messaging, mobile app analytics,…
Serves enterprises with mobile apps, app development agencies, and OEM marketing/email automation platforms across retail/QSR loyalty, health and fitness, travel/hospitality, sports/fan engagement…
Financial Health
StrongStrong · Hiring · 31% CAGR over 5y
Location
Financial sub-scores
Computed from 4 filingsOperates an online prize competition platform selling entry tickets for draws to win vehicles, carp fishing equipment, technology products and cash prizes, with winners selected in scheduled draws…
Targets UK consumers, particularly carp fishing enthusiasts and anglers, who enter online prize competitions for fishing equipment, vehicles, tech and cash prizes.
Financial Health
HealthyHealthy
Location
Financial sub-scores
Computed from 5 filingsProvides cloud-based legal case and practice management software for law firms, including conveyancing tools, document automation, client portals, legal accounting, workflow management, integrations…
Serves B2B legal practices, including solicitors, conveyancers and law firms handling family law, wills and probate, personal injury, litigation, immigration and asylum matters.
Financial Health
HealthyHealthy · Hiring · 32% CAGR over 4y
Location
Lily Neurology Limited
Financial sub-scores
Computed from 3 filingsOperates private hospitals and clinics providing medical consultations, diagnostic tests and scans, and surgical treatments across specialties including orthopaedics, cardiology, cancer care, eye…
Serves private healthcare patients across the UK, including self-pay and insured individuals, plus employers seeking occupational health services and healthcare professionals referring patients for…
Financial Health
HealthyHealthy · Growing · 0% CAGR over 2y
Location
P & J MOORE LIMITED
Financial sub-scores
Computed from 3 filingsArranges business finance for companies by brokering funding from a network of lenders. Offers access to products such as unsecured and secured loans, invoice finance, merchant cash advances,…
Serves UK limited companies and other trading organisations, including sole traders, charities and partnerships, seeking business finance.
Financial Health
StableStable · Hiring · 73% CAGR over 2y
Location
Yellow Brick Mortgages Ltd
Financial sub-scores
Computed from 5 filingsProvides mortgage brokerage and advisory services, helping clients compare and arrange residential and buy‑to‑let mortgages from multiple lenders. Supports first‑time buyers, home movers and…
Serves first-time buyers, home movers, remortgagers, landlords and property investors, including self-employed applicants, contractors, professionals and older borrowers seeking mortgage-related…
Financial Health
HealthyHealthy · Hiring · 29% CAGR over 4y
Location
Provides lending, asset and motor finance, invoice finance, and customer financing through brokers and dealers; offers savings and deposit accounts, wealth management services, and securities trading…
Serves UK small businesses, institutions and individuals, plus intermediaries such as motor dealers and insurance brokers. Targets commercial clients in sectors including aviation and marine,…
Financial Health
Insufficient historyInsufficient history
Location
HERA Clothing Limited
Financial sub-scores
Computed from 5 filingsDesigns and sells men's and women's apparel including denim jeans, hoodies, sweatshirts, T‑shirts, jackets, trousers and accessories. Operates an online retail store offering seasonal collections,…
Serves B2C online shoppers, particularly men and women seeking casual clothing and wardrobe essentials; UK consumers are explicitly targeted through delivery promotions.
Financial Health
HealthyHealthy · Hiring · 21% CAGR over 4y
Location
BUSY BEE MONTESSORI NURSERY SCHOOL LTD
Financial sub-scores
Computed from 3 filingsOperates childcare and nursery services for young children, providing early years education, supervised care, meals, and play‑based learning programmes through Busy Bees nurseries, including…
Serves parents and carers seeking nursery and early years childcare for babies and preschool children across the UK and Ireland, including families using government-funded childcare options.
Financial Health
HealthyHealthy · -1% CAGR over 2y
Location
UBER VANS LTD
Financial sub-scores
Computed from 5 filingsSells and leases new light commercial vehicles from multiple manufacturers. Provides van finance options, fleet supply, and online tools to compare models and build deals, with optional styling…
Serves UK tradespeople, small businesses and fleet buyers needing brand-new commercial vans, pickups, kombis and specialist vehicles, with finance or leasing options from major manufacturers.
Financial Health
StableStable · 0% CAGR over 4y
Location
LONDON WOMEN'S CLINIC (DARLINGTON) LIMITED
Financial sub-scores
Computed from 5 filingsProvides private fertility assessment and treatment services, including IVF, ICSI and IUI procedures, egg and sperm donation, egg freezing, embryo genetic testing, and counselling for individuals and…
Serves private fertility patients across the UK, including women and couples experiencing infertility, single women, lesbian couples, over-40s, and people seeking donor, surrogacy or fertility…
Financial Health
StableStable
Location
TILESANDSTONEDIRECT LIMITED
Financial sub-scores
Computed from 5 filingsRetailer of wall and floor tiles, bathroom suites and sanitaryware, and luxury vinyl and other flooring products. Sells porcelain and ceramic tiles, outdoor paving, and installation accessories…
Serves UK homeowners renovating interiors and outdoor spaces, plus trade professionals such as tilers, bathroom fitters, builders and designers using showroom, online and trade-account purchasing.
Financial Health
HealthyHealthy · Hiring · 5% CAGR over 4y
Location
Smart-Cover Direct Limited
Financial sub-scores
Computed from 5 filingsProvides insurance policies covering home appliances, home emergency repairs, boilers, plumbing and drainage, landlord property risks, and vehicle breakdown assistance, including roadside recovery…
Targets UK homeowners, tenants, landlords and vehicle owners with household and roadside cover needs, including private motorists and operators of vans, taxis, minibuses, motorhomes, classic cars and…
Financial Health
HealthyHealthy · -7% CAGR over 4y
Location
MONEYSHAKE.COM LIMITED
Financial sub-scores
Computed from 3 filingsOperates an online platform that compares personal and business car leasing deals across multiple manufacturers and models. Enables users to search by budget or vehicle type and access services…
Serves individual motorists and business customers comparing car lease deals by make, budget, body type, and fuel type, including families, commuters, city drivers, and companies seeking vehicle…
Financial Health
WeakWeak · -35% CAGR over 2y
Location
Country Fashion Limited
Financial sub-scores
Computed from 3 filingsDesigns and sells country-style clothing, footwear and accessories through an online retail store. Product range includes tweed jackets, shirts, boots, hats, equestrian wear, outdoor apparel, and pet…
Serves consumers seeking British country and outdoor styles, including women, men and children, plus rural lifestyle shoppers such as equestrians, farmers, shooters, walkers and pet owners.
Financial Health
StableStable · -29% CAGR over 2y
Location
Financial sub-scores
Computed from 5 filingsProduces and sells spice blends, recipe kits, and cookbook kits for preparing international dishes. Offers subscription boxes delivering measured spices and recipes by post, along with individual…
Sells to consumers, especially home cooks seeking world-food cooking kits, spice subscriptions and food gifts, with separate online stores for UK and Australian shoppers.
Financial Health
StableStable · -16% CAGR over 4y
Location
Financial sub-scores
Computed from 5 filingsProvides a mobile app and debit card enabling users to buy, hold and spend a digital currency backed by physical gold. Converts deposits into vaulted gold and supports payments, transfers and ATM…
Serves individual consumers and savers who want an alternative to bank deposits, including people seeking protection from currency devaluation and worldwide access to their funds.
Financial Health
HealthyHealthy · Growing · 0% CAGR over 4y
Location
PENTIRE DRINKS LIMITED
Financial sub-scores
Computed from 5 filingsManufactures non‑alcoholic botanical drinks and ready‑to‑drink canned cocktails. Distils coastal plants and botanicals to produce alcohol‑free spirits, spritzes and premixed beverages sold in…
Sells to consumers seeking non-alcoholic drink alternatives, especially active outdoor lifestyle shoppers, plus trade and wholesale buyers such as stockists, hospitality venues and retailers.
Financial Health
StrongStrong · Growing, Hiring · 41% CAGR over 4y
Location
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How Google Optimize 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.
Google Optimize is a trademark of its respective owner. Firmbase is not affiliated with, sponsored by, or endorsed by the trademark owner.
Google Optimize users by sector
Frequently asked questions
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