Companies Using IONOS in London: 73 Active Firms (2026)
Companies running third-party web hosting use managed internet infrastructure for public websites, within London boroughs.
Adoption tends to sit outside central IT: marketing teams, owner-managers and external web agencies are usually the buying centre. Companies running this hosting stack are using it for brochure sites, enquiries, local search and simple commerce rather than hosting customer-facing software. That choice usually signals a paid web budget, but not a large infrastructure function; the website is operationally useful, not necessarily product-critical. The cohort therefore skews towards small and mid-market service businesses with lean staffing, positive commercial activity and enough go-to-market maturity to maintain a public web presence across London boroughs.
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London has 73 active companies running this hosting stack, and reported employment across the cohort totals 684 people. The user base leans towards local operating sectors rather than software production: field services and trades account for 20.5%, construction 19.2%, and healthcare providers 15.1%. A median reported turnover of around £453,000 and median headcount of 7 suggest mainly owner-managed or small departmental operations. Co-detected site-builder tooling is common, while analytics and content-management tools appear in a smaller minority of websites.
Regulation falls mainly on what the website does, rather than on use of managed hosting itself. Enquiry forms, appointment requests and account logins bring GDPR obligations around processor terms, retention, access rights and breach handling, with the ICO as the practical reference point. Sector mix matters here: healthcare providers and education or training businesses tend to handle more sensitive data than trades or construction firms. Procurement is usually light, but researchers should expect agency involvement, packaged domains and email, and contractual dependence on the hosting provider for uptime, backups and site recovery.
Adoption appears likely to remain pragmatic rather than strategic. Many users seem to need a maintained web presence, search visibility and low-friction editing, without the cost of a bespoke build or a dedicated web team. Bundling may keep these sites on hosted website packages for longer, especially where agencies manage refresh cycles and content updates. Movement away from the stack tends to occur when firms outgrow template constraints, add more complex marketing automation, or bring digital acquisition under a more specialised internal team.
What’s in the file
One row per company, 50+ columns — everything below plus each company’s verified directors, from Companies House filings.
Company data
Verified directors — included
Adoption by company size
Adoption of IONOS rises with company size across the trading companies in this cohort. 0% of the 532,485 companies with under 10 employees run IONOS (47 detected). 0.1% of the 15,364 companies with 10–50 employees run IONOS (22 detected). 0.1% of the 1,763 companies with over 50 employees run IONOS (2 detected). That is a 0.1% gap between the over 50 employees and under 10 employees bands.
73
Active firms
2026
2
Above £5M turnover
Trading firms
7
Median headcount
Filed accounts
117
Verified directors
Across this cohort
Top companies using IONOS 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 3 filingsProvides registered office and director service address services, virtual business addresses, mail handling and forwarding, telephone answering, and company formation support, enabling companies to…
Sells to startups, SMEs, and UK or international limited companies needing a registered office, director service address, or virtual business address. Targets business owners who want to receive…
Financial Health
HealthyHealthy · Hiring · 22% CAGR over 2y
Location
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Financial sub-scores
Computed from 5 filingsProvides corporate management and administrative services including company formation, registered office and company secretary services, virtual office facilities, preparation and filing of annual…
Sells to businesses and company owners needing company formation, registered office, company secretarial, virtual office and compliance support, including international clients seeking offshore…
Financial Health
HealthyHealthy · 0% CAGR over 4y
Location
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Computed from 5 filingsProvides property maintenance and refurbishment services, including plumbing, heating engineering, electrical work, carpentry, locksmith services, decorating, plastering, replacement windows, floor…
Serves property owners, landlords and occupiers across London, particularly west, south-west and south-east postcodes, needing maintenance and refurbishment support.
Financial Health
WeakWeak · Hiring · 11% CAGR over 4y
Location
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Computed from 5 filingsProvides contract garden maintenance for communal gardens and squares, specialising in lawn care. Services include plant care, annual bedding, garden design, and general horticultural maintenance,…
Serves resident associations, garden square committees, estate owners and property managers responsible for large communal gardens in West and Central London.
Financial Health
StableStable · -68% CAGR over 4y
Location
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Provides building contracting services including residential refurbishment, exterior refurbishment and restoration, and construction project management. Oversees building projects ranging from…
Serves homeowners, property owners, developers and commercial or industrial clients in London, covering projects from single-family homes to industrial buildings.
Financial Health
N/AN/A
Location
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Financial sub-scores
Computed from 4 filingsSells personalised gifts and customised products through an online store, including items branded under the UniGift range, allowing customers to create and order tailored gift items for personal…
Serves individual consumers looking for personalised and unique gift ideas for personal occasions through an online retail offering.
Financial Health
HealthyHealthy · 0% CAGR over 3y
Location
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Computed from 5 filingsWholesale bakery producing a range of desserts for retailers and food businesses, including traybakes, cheesecakes, brownies, loaf cakes, crumbles and round cakes. Manufactures and supplies over 100…
Serves food retailers, cafés, caterers, event and fundraising organisers, and dessert distributors that stock bakery products, plus retail customers, with delivery restricted to the London M25.
Financial Health
WeakWeak · -16% CAGR over 4y
Location
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Computed from 4 filingsEstate agency providing residential property sales and lettings, landlord services, property management, and valuation services. Also offers commercial property management and marketing of homes and…
Serves residential property sellers, buyers, landlords and tenants, plus commercial property owners, in Teddington, Twickenham, Hampton Wick, Richmond, Isleworth, St Margarets, Strawberry Hill and…
Financial Health
StableStable · 0% CAGR over 3y
Location
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Computed from 5 filingsProvides facilities management services for offices, including commercial cleaning, building maintenance, fire safety installation and servicing, office renovation, workplace supplies, and compliance…
Serves businesses and property/facilities managers needing office cleaning, maintenance, renovation, compliance and managed facilities services for workplaces.
Financial Health
WeakWeak · 0% CAGR over 4y
Location
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Computed from 3 filingsProvides professional cleaning services for residential and commercial properties, including cleaning for new-build and bespoke construction projects, end-of-tenancy cleans, and general building…
Serves commercial property clients, new-build projects, landlords, tenants and homeowners needing residential or end-of-tenancy cleaning across London and the South.
Financial Health
WeakWeak · -16% CAGR over 2y
Location
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Computed from 5 filingsProvides commercial and residential cleaning and property maintenance services, including office and communal block cleaning, deep cleaning, window and carpet cleaning, jet and steam washing,…
Serves businesses, property managers and residential block owners or management companies in Greater London, especially Chelsea, Kensington and Mayfair.
Financial Health
StrongStrong · Growing, Hiring · 7% CAGR over 4y
Location
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Computed from 5 filingsProvides accountancy and tax consultancy services, including preparation of financial statements, tax advice, and business consulting to support financial management, reporting, and planning for…
Serves entrepreneurs, business owners and companies seeking accountancy, tax and corporate planning support, with a regional focus implied by its Ilford-based positioning.
Financial Health
HealthyHealthy · Growing · 0% CAGR over 4y
Location
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Computed from 5 filingsOperates pet retail stores and an online shop selling pet food, accessories, and supplies for dogs, cats, fish, birds, reptiles, and small animals, with options for in‑store shopping and…
Serves B2C pet owners and households, particularly local shoppers using Richmond and Sheen stores, with needs across dogs, cats, fish, birds, reptiles and small animals.
Financial Health
HealthyHealthy · -9% CAGR over 4y
Location
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Computed from 5 filingsOperates retail food stores specialising in Filipino and Thai groceries. Sells a range of Oriental food products including packaged foods, cooking ingredients, and specialty items from Eastern Asia…
Serves retail consumers and local communities in London, especially shoppers seeking Filipino, Thai and other East Asian grocery products through physical branches.
Financial Health
StrongStrong · Growing, Hiring · 11% CAGR over 4y
Location
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Computed from 5 filingsProvides commercial cleaning and building refurbishment services for schools, nurseries, restaurants and offices. Services include routine premises cleaning, site support and property refurbishment…
Serves B2B and institutional clients, especially schools, nurseries, restaurants and offices, plus organisations and property owners needing cleaning, building or refurbishment support, with a clear…
Financial Health
StrongStrong · Growing, Hiring · 9% CAGR over 4y
Location
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Computed from 5 filingsProvides residential estate agency services including property sales, lettings, and property management. Markets rental properties, arranges tenancies for landlords and tenants, and manages…
Serves private landlords, tenants, home sellers and buyers in the East London property market, including clients seeking sales, lettings and property management support.
Financial Health
StrongStrong · Hiring · 26% CAGR over 4y
Location
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Computed from 5 filingsProvides architectural and structural engineering services for residential construction projects, including extensions, loft and basement conversions, and new builds. Produces architectural drawings,…
Serves homeowners, private clients and property developers undertaking residential extensions, basement or loft conversions and new-build dwellings.
Financial Health
StableStable · 0% CAGR over 4y
Location
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Computed from 3 filingsProvides facilities management and cleaning services including communal area cleaning, grounds maintenance, gardening, waste removal, void property clearance and cleaning, show flat preparation, and…
Serves public sector and commercial clients, especially local authorities and large registered social landlords, across London, Essex, Surrey, Kent and South East England.
Financial Health
WeakWeak · -7% CAGR over 2y
Location
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Computed from 5 filingsProduces and sells baked goods including artisan and traditional breads, cakes, cupcakes, gateaux, cookies and pastries. Offers vegan baked products, savoury items such as sausage rolls, and catering…
Sells primarily to consumers buying baked goods, cakes, party platters and food to go, including vegan customers. Serves local shop visitors and collection customers, with nationwide delivery for…
Financial Health
DistressedDistressed · -68% CAGR over 4y
Location
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Computed from 5 filingsProvides teleradiology reporting services for healthcare providers, including remote interpretation of CT, MRI and X‑ray imaging studies, backlog reporting, and clinical audit support, using…
Serves radiology managers and service leads in NHS trusts and private hospital groups needing external reporting support, including CT, MRI and X-ray workloads.
Financial Health
StableStable · Hiring · 23% CAGR over 4y
Location
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Computed from 5 filingsProvides recruitment and employment placement services, connecting job seekers with temporary and permanent job opportunities and assisting businesses with filling vacancies through candidate…
Serves both job seekers and employers, helping candidates find temporary and permanent work while supporting businesses with recruitment needs. Targets people seeking work and business clients…
Financial Health
WeakWeak · -8% CAGR over 4y
Location
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Computed from 5 filingsProvides healthcare staffing and recruitment services, placing nurses, carers and other healthcare professionals in temporary, ad‑hoc and permanent roles with NHS organisations, private hospitals and…
Sells to NHS organisations, private hospitals and other healthcare providers needing temporary, ad-hoc or permanent nurses, carers and healthcare professionals, including mental health services. Also…
Financial Health
WeakWeak · 0% CAGR over 4y
Location
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Computed from 5 filingsProvides painting and decorating services for commercial and domestic properties. Undertakes interior and exterior painting, wallpapering, specialist wall coverings, spray painting, and application…
Sells to both commercial and domestic customers, including offices, local authorities, schools, nurseries, hospitals, housing associations, warehouses, factories and hotels in London within the M25…
Financial Health
WeakWeak · 0% CAGR over 4y
Location
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Computed from 3 filingsProvides IT recruitment services, sourcing and placing technology professionals for client organisations. Works with employers to identify hiring requirements and match candidates across a range of…
Serves businesses across the UK and internationally that need to hire IT and technology professionals, including employers seeking recruitment support for specialist technical roles.
Financial Health
HealthyHealthy · 0% CAGR over 2y
Location
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Computed from 4 filingsProvides application security consulting for software development, including secure coding practices, threat modelling, code review and testing. Also delivers fraud prevention systems, incident…
Serves B2B customers, primarily financial institutions and enterprise teams handling sensitive data, critical applications and high-value digital transactions, including development, security, risk…
Financial Health
StrongStrong · Hiring · 71% CAGR over 3y
Location
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Computed from 5 filingsProvides residential and commercial cleaning services including routine and one-off deep cleaning for homes, offices and schools, carpet cleaning for residential and commercial premises, and…
Serves households, offices, schools, nurseries, childminders and other commercial premises in London and surrounding areas.
Financial Health
StrongStrong
Location
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Computed from 5 filingsProvides search engine optimisation services for businesses, including technical SEO, AI search optimisation, link building, guest posting, digital PR, content marketing, copywriting and SEO audits…
Serves businesses worldwide, from SaaS startups and growing brands to large enterprises and S&P 500 companies, across multiple sectors seeking organic search and AI visibility support.
Financial Health
HealthyHealthy · Hiring · 7% CAGR over 4y
Location
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Computed from 5 filingsProvides MOT testing, servicing, maintenance and repair for cars and motorcycles. Operates a vehicle workshop offering diagnostics, routine servicing, mechanical repairs and motorcycle recovery…
Serves local car and motorcycle owners in Kingston upon Thames and Richmond, including drivers and riders of European, Japanese and Italian makes.
Financial Health
StableStable · 0% CAGR over 4y
Location
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Computed from 5 filingsProvides domiciliary health and social care services, including personal care, domestic support, meal preparation and nutritional support, night care, hourly home visits, medication assistance, and…
Serves individuals and families needing CQC-regulated home care, including older adults and people requiring personal care, domestic support, meals, medication help, night care or companionship…
Financial Health
StrongStrong
Location
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Computed from 5 filingsOperates a vehicle repair workshop providing car servicing, MOT testing preparation, mechanical repairs, accident damage repairs and body resprays. Also offers vehicle inspections and general…
Serves local vehicle owners in Sutton needing car servicing, MOTs and accident repairs, and works with insurers seeking repairers for policyholder vehicles.
Financial Health
HealthyHealthy · Growing · 0% CAGR over 4y
Location
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Computed from 5 filingsOperates a day nursery and pre-school providing childcare and early years education for children from around three months to school age. Offers structured curriculum, indoor and outdoor play,…
Serves parents and families in Sidcup seeking early years care and pre-school places for children aged 3 months to school age, including funded childcare users.
Financial Health
StableStable · Hiring · 11% CAGR over 4y
Location
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Computed from 5 filingsProvides accountancy and tax consultancy services for companies, partnerships, individuals and public sector clients, including financial reporting, tax planning and compliance, consulting, and…
Serves businesses, partnerships, individual clients and public sector organisations needing accountancy, tax and business support, including both standard and more complex business management needs.
Financial Health
StableStable · -3% CAGR over 4y
Location
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Computed from 3 filingsOperates a retail grocery store and online shop selling Indian and Sri Lankan food products, including fresh vegetables, spices, packaged groceries, and household staples for Asian cuisine.
Serves consumers shopping online for Indian, Sri Lankan and wider Asian groceries, vegetables and household food products.
Financial Health
StableStable · -5% CAGR over 2y
Location
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Computed from 3 filingsProvides wholesale procurement and distribution of pharmaceutical and healthcare products, including UK generic and branded medicines, medical devices and dressings. Also conducts parallel import and…
Serves licensed pharmaceutical wholesalers, distributors and healthcare product businesses sourcing generics, branded medicines, medical devices and dressings across Europe, the Middle East and…
Financial Health
DistressedDistressed · -11% CAGR over 2y
Location
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Computed from 5 filingsProvides recruitment and staffing services for housing and social support roles, supplying trained support workers and related personnel to organisations requiring housing support and social welfare…
Serves housing and social welfare organisations needing experienced front-line housing support staff, including providers seeking recruitment and staffing support across the UK.
Financial Health
DistressedDistressed · -18% CAGR over 4y
Location
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Computed from 5 filingsProvides accountancy and tax services including bookkeeping, management accounts, payroll, VAT and corporation tax compliance. Offers business advisory, financial forecasting, finance director…
Serves private individuals, owner-managed businesses and start-ups, with a specialist focus on charities and not-for-profit organisations. Also targets Vietnamese-speaking clients seeking accountancy…
Financial Health
StrongStrong · Hiring · 4% CAGR over 5y
Location
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Computed from 5 filingsProvides security services for corporate and private events, including SIA‑licensed door supervisors, guest entry and venue security, and event health and safety supervision and management for venues…
Serves corporate clients, private event hosts and event venues that require security staff and health and safety supervision for events involving guests, staff and venue operations.
Financial Health
StrongStrong · Hiring · 14% CAGR over 4y
Location
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Computed from 5 filingsOperates a childcare service offering nursery care for children aged 0–4, as well as breakfast, after‑school and holiday clubs for primary school children, providing supervised care and activities…
Serves parents and carers in Beckenham/Elmers End seeking nursery care for children aged 0–4 and breakfast, after-school and holiday club places for primary school children from Reception to Year 6.
Financial Health
HealthyHealthy · Hiring · 13% CAGR over 4y
Location
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Computed from 3 filingsProvides fire safety engineering services including design, installation, commissioning and maintenance of fire alarm systems. Also supplies and services fire extinguishers, conducts PAT testing, and…
Serves businesses and public-sector organisations responsible for building safety, including retail, banking, government, property, defence, commercial and industrial sites.
Financial Health
HealthyHealthy · Hiring · 22% CAGR over 2y
Location
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Computed from 5 filingsProvides residential building and renovation services including loft conversions, kitchen and bathroom installation, interior refurbishments, plumbing, electrical and carpentry work, and project…
Serves private residential property owners and landlords, alongside some commercial property clients; enquiries shown are mainly from homeowners in London postcodes.
Financial Health
StrongStrong · Growing · 0% CAGR over 4y
Location
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Computed from 5 filingsSupplies pizza ingredients, packaging and takeaway shop products, including flour, cheese, pizza toppings, sauces, halal chicken items, frozen sides, drinks and pizza boxes. Also provides cleaning…
Serves B2B foodservice customers, especially pizza takeaways, restaurants and delivery operators needing ingredients, packaging and related supplies for their businesses.
Financial Health
HealthyHealthy · 0% CAGR over 4y
Location
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Computed from 5 filingsOperates a nursery and childcare service providing day care for babies and young children, with age‑grouped rooms, early years learning activities, outdoor forest school sessions, and before‑ and…
Serves parents and guardians needing nursery, preschool, before/after-school and holiday childcare for children aged 3 months to Year 6, including families using funded early-years places.
Financial Health
StableStable · Hiring · 6% CAGR over 4y
Location
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Computed from 5 filingsProvides construction and property development services, including home and commercial building, renovation and maintenance. Also offers logistics and courier transport, self‑storage facilities, skip…
Serves a mix of domestic and commercial customers: homeowners, movers, travellers, office and property owners, and businesses with premises, parcels, bulky goods or waste needs, mainly around London,…
Financial Health
DistressedDistressed · -17% CAGR over 4y
Location
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Computed from 3 filingsProvides vehicle repair and maintenance services including accident bodywork repairs, mechanical repairs, MOT and emissions testing, air‑conditioning servicing, tyre services, and electronic…
Serves private motorists and vehicle owners in Wembley, alongside leading insurance companies needing approved repairers for policyholder vehicles.
Financial Health
StrongStrong · Hiring · 26% CAGR over 2y
Location
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Computed from 5 filingsProvides domiciliary home care services for vulnerable adults, including personal care, assistance with bathing and dressing, medication administration, accompaniment to medical appointments,…
Serves vulnerable adults, older people and individuals needing support with daily living, plus their families or carers, in Enfield and surrounding areas.
Financial Health
StrongStrong · Growing, Hiring · 31% CAGR over 4y
Location
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Computed from 5 filingsProvides healthcare recruitment services, supplying trained care staff to care homes and healthcare providers. Sources and places temporary or shift-cover workers, matching personnel to client…
Sells to healthcare providers needing temporary or short-notice staffing, likely including care homes and other health and social care employers seeking skilled agency staff.
Financial Health
StrongStrong · Growing, Hiring · 4% CAGR over 4y
Location
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Computed from 5 filingsProvides ceiling and partition installation services for commercial construction projects, acting as a contractor for interior fit‑out works including suspended ceilings, partition systems, and…
Financial Health
HealthyHealthy · Growing, Hiring · 19% CAGR over 4y
Location
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Computed from 4 filingsProvides healthcare staffing and supported living services, supplying trained carers, support workers and nurses to residential and nursing homes, hospitals, supported living settings and domiciliary…
Serves healthcare and social care organisations, including residential and nursing homes, supported living providers, hospitals, mental health and learning disability services, and domiciliary care…
Financial Health
HealthyHealthy · -7% CAGR over 3y
Location
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51 more companies and their verified directors are in the file
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Key facts
About 2% of the trading cohort reports turnover above £5M (2 of 73 firms) — the rest sits below that revenue band.
4% of the cohort was incorporated since 2022 (3 firms), so a sizeable share is in its first few filing cycles.
Site-builder overlap is common: 76.7% of users, or 56 firms, have a paired website-builder detection alongside the hosting stack.
Field services and trades account for 20.5% (15) of the London cohort, while construction accounts for 19.2% (14).
Healthcare providers make up 15.1% (11), giving the cohort a visible presence in appointment-led and local-service markets.
Financial-health flags are mixed, with 13.7% (10) classified as weak and 6.8% (5) classified as distressed.
117 verified directors are associated with the cohort.
What else do IONOS users run?
Share of the 73 IONOS-running UK companies where each technology was also detected. As of June 2026.
Who runs IONOS 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.
7
Median headcount
£453.3K
Median UK turnover
2.7%
Above £5M turnover
3
Incorporated since 2022
Verified directors — included in the file
Director names and roles for these 99 companies, alongside financials and websites, in one Excel + CSV file.
How IONOS 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.
IONOS is a trademark of its respective owner. Firmbase is not affiliated with, sponsored by, or endorsed by the trademark owner.
IONOS elsewhere
Frequently asked questions
How many companies in London use IONOS?
How is IONOS usage detected?
What kinds of companies use IONOS in London?
What do IONOS users in London also run?
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Can I get contact details for these companies?
Buy all 99 companies as a spreadsheet.
One Excel/CSV file with company details, websites and key data — yours to download and use.