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TIC Companies in Bristol: 100+ Active Firms (2026)
Testing, inspection and certification companies in Bristol assess products, systems and sites for conformity across the surrounding metropolitan economy.
Buying centres in this Bristol cohort sit mainly in quality, compliance, operations and facilities roles, rather than in central finance or software procurement. Buyers are typically regional manufacturers, engineering contractors, construction teams, environmental managers and safety or quality assurance functions that need independent evidence for customers, insurers, regulators or supply-chain partners. Engagements tend to be practical and recurring: site inspections, product tests, calibration work, audit preparation, certification support and documented remedial checks. The commercial shape is therefore service-led, with specialist staff, auditable methods and repeat local relationships mattering more than high-volume transactional sales.
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Bristol has 109 actively trading TIC firms, a relatively small local cohort within the South West’s engineering, construction and environmental services base. Reported headcount totals 773 people, pointing to a market made up largely of specialist service teams rather than large multi-site employers. The early-company layer is visible but not dominant: 14 firms were incorporated since 2022. Scale remains limited on reported turnover, with no Bristol operator in this cohort above £5M. For researchers, that makes the city more useful as a regional conformity-assessment cluster than as a headquarters base for national TIC groups.
Conformity assessment in the UK is organised around accreditation rather than a single trade licence. GOV.UK describes third-party accreditation as “checking the checkers”, while UKAS carries the National Accreditation Body role for organisations seeking recognised accreditation in the UK. Product conformity sits alongside that accreditation layer: UKCA and CE rules determine when external assessment and marking are required for particular product categories. OPSS processes matter where a body wants appointment as an Approved Body for Great Britain or a UK Notified Body for Northern Ireland, with listings appearing on the UK Market Conformity Assessment Bodies register.
Demand appears more likely to move with compliance scrutiny, infrastructure maintenance and supply-chain assurance than with discretionary spending cycles. The Bristol cohort tends to look specialist and regional, so growth may come through deeper technical scopes, repeat inspection programmes and accreditation-backed credibility rather than broad sales expansion. Scarcity of larger turnover businesses also points to fragmented provision, with consolidation plausible where customers want wider geographic coverage or bundled testing and certification. At the same time, smaller operators may retain a place where local site knowledge, fast mobilisation and trusted audit trails are more valuable than national reach.
109
Active firms
2026
14
Recent incorporations
incorporated since 2022
0
Above £5M
turnover threshold
Key facts
12% of the cohort was incorporated since 2022 (14 firms), so a sizeable share is in its first few filing cycles.
UK accreditation sits under the Accreditation Regulations 2009, with the national accreditation body used to establish that conformity assessment bodies are competent.
UKCA and CE regimes cover more than 20 product types, with sector-specific rules deciding whether third-party assessment and marking are needed.
Testing is commonly the largest service line, while certification is identified as the faster-growing service segment.
The UK accounted for 4.5% of the global testing, inspection and certification market in 2025.
Top Bristol TIC companies
Veqter Ltd
Trajectory
3y · 2023–NowFinancial sub-scores
Computed from 3 filingsProvides residual stress measurement, analysis and consultancy for engineering components using techniques such as deep‑hole drilling, X‑ray diffraction and neutron diffraction. Also develops…
Serves B2B engineering and industrial clients worldwide needing residual stress measurement and analysis for engineering components, including operators and manufacturers of rotating machinery,…
Financial Health
StrongStrong · Growing, Hiring · 5% CAGR over 2y
Location
ACOUSTIC CONSULTANTS LIMITED
Trajectory
5y · 2021–NowFinancial sub-scores
Computed from 5 filingsProvides acoustic consultancy services including noise and vibration assessments, environmental noise studies, sound insulation and air‑tightness testing, and noise monitoring and modelling. Advises…
Sells to mainly B2B and public sector clients, including builders, construction firms, housing associations, supermarkets, local authorities, government bodies, and large industrial and technology…
Financial Health
HealthyHealthy · Hiring · 8% CAGR over 4y
Location
Radnor Range Limited
Trajectory
3y · 2023–NowFinancial sub-scores
Computed from 3 filingsProvides independent testing and evaluation of weapons, ordnance, munitions and explosives, including ballistic and blast trials, armoured vehicle and material testing, UN series and insensitive…
Serves defence and security organisations, including public-sector military customers, armoured vehicle and materials manufacturers, weapons and munitions developers, drone/counter-drone teams, and…
Financial Health
StrongStrong · Growing, Hiring · 14% CAGR over 2y
Location
JP TESTING & ASSESSMENTS LTD
Trajectory
4y · 2022–NowProvides acoustic consultancy and building compliance testing, including sound insulation testing, air permeability testing, and environmental noise impact assessments for construction projects,…
Serves property developers, housebuilders, contractors and construction professionals needing building-regulation compliance support for residential projects, with coverage promoted across the UK.
Financial Health
Insufficient historyInsufficient history
Location
HYDE & CAL SERVICES LTD
Trajectory
4y · 2022–NowFinancial sub-scores
Computed from 4 filingsProvides calibration, servicing and repair of drain inspection cameras, cable avoidance tools and safety equipment. Also supplies and hires CCTV drain cameras, gas monitors and survey equipment, and…
Serves UK construction, utilities and drainage businesses, including contractors and survey teams that use drain inspection cameras, cable avoidance tools, gas monitors and related safety equipment.
Financial Health
StableStable · -21% CAGR over 3y
Location
Core Europe Ltd
Trajectory
5y · 2020–NowFinancial sub-scores
Computed from 5 filingsFinancial Health
StrongStrong · Growing · 0% CAGR over 4y
Location
2CT Limited
Trajectory
5y · 2020–NowFinancial sub-scores
Computed from 5 filingsProvides construction risk mitigation and building consultancy services, including technical monitoring, retrofit assessment and coordination, damp and mould surveys, thermal imaging, air pressure…
Serves property owners, developers, contractors and portfolio managers across residential low- and high-rise buildings, offices, schools, universities and healthcare estates, with some services for…
Financial Health
WeakWeak · 0% CAGR over 5y
Location
Mach Acoustics Limited
Trajectory
3y · 2023–NowFinancial sub-scores
Computed from 3 filingsProvides acoustic consultancy and sound testing for buildings, including noise and vibration surveys, environmental noise and BS4142 assessments. Also conducts daylight modelling, overheating and…
Serves built-environment clients across the UK, including developers, architects, contractors and building owners in education, residential, commercial, and arts and entertainment sectors.
Financial Health
StableStable · 0% CAGR over 2y
Location
SAFETY TEST UK LTD
Trajectory
3y · 2023–NowFinancial sub-scores
Computed from 3 filingsProvides electrical inspection and testing services for commercial premises, including portable appliance testing (PAT), fixed wiring inspections, emergency lighting testing, thermographic surveys,…
Serves businesses and employers nationwide, including leading brands and organisations with commercial premises subject to electrical safety, fire safety and insurance compliance requirements.
Financial Health
HealthyHealthy · Profitable, Hiring · 15% CAGR over 2y
Location
Ashdale Engineering UK Ltd
Trajectory
5y · 2021–NowFinancial sub-scores
Computed from 5 filingsProvides engineering inspection and testing services for workplace equipment and infrastructure, including lifts, cranes, boilers, pressure systems, industrial doors and ventilation systems,…
Serves UK businesses and site operators with regulated workplaces, including owners of lifts, cranes, plant, boilers, pressure systems, industrial doors, gyms, playgrounds, kitchens, LPG…
Financial Health
HealthyHealthy · 2% CAGR over 4y
Location
NOISE CONSULTANTS LIMITED
Trajectory
3y · 2023–NowFinancial sub-scores
Computed from 3 filingsProvides environmental noise and vibration consultancy services including modelling, measurement, monitoring and mapping, environmental impact assessments, noise at work assessments, and expert…
Serves private and public sector clients, including airports, planners and property developers, industrial operators, local authorities, government agencies, infrastructure project teams, and wind…
Financial Health
StrongStrong · Growing, Hiring · 11% CAGR over 2y
Location
ION ACOUSTICS LIMITED
Trajectory
3y · 2023–NowFinancial sub-scores
Computed from 3 filingsProvides acoustic consultancy services for development and infrastructure projects including wind farms, housing, studios, theatres, schools and colleges, advising on noise, sound impact and related…
Serves B2B and public-sector clients across property development, wind energy, broadcast studios, colleges, theatres and schools, from major infrastructure schemes to housing developments.
Financial Health
StableStable · 0% CAGR over 2y
Location
FIRTH CONSULTANTS LIMITED
Trajectory
3y · 2023–NowFinancial sub-scores
Computed from 3 filingsProvides environmental consultancy focused on assessing risks from contaminated land. Conducts hydrogeological, human health and ecological risk assessments, consequence modelling, peer review and…
Serves B2B and public sector clients dealing with contaminated land issues, including landowners, property developers, local authorities, regulators, chemical companies, environmental consultancies…
Financial Health
StableStable · 0% CAGR over 2y
Location
BUILDING ENERGY GROUP LTD
Trajectory
5y · 2021–NowFinancial sub-scores
Computed from 5 filingsFinancial Health
StableStable
Location
Warren-Gash Ltd
Trajectory
5y · 2021–NowFinancial sub-scores
Computed from 5 filingsFinancial Health
StrongStrong · Hiring · 19% CAGR over 4y
Location
ESOS Energy Ltd
Trajectory
5y · 2021–NowFinancial sub-scores
Computed from 5 filingsProvides energy auditing and consultancy services, including ESOS assessments, EPC and DEC certification, SECR reporting, and TM44 air‑conditioning inspections. Advises organisations on energy…
Serves educational institutions, commercial property owners and managers, and public sector bodies including local authorities and government organisations with energy, carbon and building compliance…
Financial Health
StrongStrong · Growing, Hiring · 17% CAGR over 4y
Location
REENA ENTERPRISES LIMITED
Trajectory
5y · 2020–NowFinancial sub-scores
Computed from 5 filingsProvides analytical laboratory testing, regulatory affairs support and contract manufacturing services for pharmaceutical, natural health product, cosmetics, personal care and food and beverage…
Serves B2B brands and manufacturers in natural health products, pharmaceuticals, cosmetics, personal care, food and beverage, medical devices, and cannabis/CBD markets.
Financial Health
StableStable · Hiring · 5% CAGR over 4y
Location
CAL NOBLE ACCESS SOLUTIONS LTD
Trajectory
5y · 2021–NowFinancial sub-scores
Computed from 5 filingsFinancial Health
DistressedDistressed · 0% CAGR over 2y
Location
OLFASENSE UK LTD
Trajectory
5y · 2022–NowFinancial sub-scores
Computed from 5 filingsProvides odour measurement, testing and consultancy services for industry and product development. Conducts environmental odour surveys, emission testing, dispersion modelling and laboratory…
Serves businesses from small firms to multinationals, especially industrial operators needing environmental odour assessment and control, plus consumer product and materials companies seeking sensory…
Financial Health
StableStable · -62% CAGR over 4y
Location
SOVEREIGN EXTINGUISHING LIMITED
Trajectory
3y · 2023–NowFinancial sub-scores
Computed from 3 filingsDesigns, installs, commissions and maintains fire suppression and fire extinguishing systems for buildings. Services include gas suppression, water mist and aerosol systems, fire door inspection,…
Sells primarily to businesses and commercial building operators across the UK needing fire suppression, servicing and compliance support, including facilities teams, property managers and…
Financial Health
StrongStrong · Growing, Hiring · 41% CAGR over 2y
Location
Cook & Edwards Ltd
Trajectory
5y · 2021–NowFinancial sub-scores
Computed from 5 filingsFinancial Health
WeakWeak · 0% CAGR over 4y
Location
STIGIL STRESS ANALYSIS LIMITED
Trajectory
4y · 2022–NowFinancial sub-scores
Computed from 4 filingsFinancial Health
WeakWeak · -78% CAGR over 3y
Location
Squad Serv Ltd
Trajectory
1y · 2025–NowFinancial Health
Insufficient historyInsufficient history
Location
RESEARCHERLY LTD
Trajectory
5y · 2021–NowFinancial Health
Insufficient historyInsufficient history
Location
Utilimap Limited
Trajectory
5y · 2021–NowFinancial sub-scores
Computed from 5 filingsProvides land and utility surveying services including underground utility mapping (PAS 128), ground‑penetrating radar surveys, topographical and engineering surveys, CCTV drainage inspections, 3D…
Serves B2B and public-sector project teams in construction, property development, infrastructure and estate management, including education and cultural sites requiring land, utility and drainage…
Financial Health
StableStable · 0% CAGR over 4y
Location
ARION LIMITED
Trajectory
3y · 2023–NowFinancial sub-scores
Computed from 3 filingsProvides health and safety consultancy and compliance services for businesses, including risk assessments, audits, inspections, and accident investigation. Delivers training courses such as first…
Serves businesses and organisations across the UK, including trades, building and construction firms, retail and hospitality operators, schools, landlords and managing agents with staff and…
Financial Health
DistressedDistressed
Location
SPECIALIST LIGHTING SERVICES (UK) LIMITED
Trajectory
5y · 2020–NowFinancial sub-scores
Computed from 5 filingsProvides lighting and electrical services including lighting installation and maintenance, LED lighting conversions, emergency lighting design and testing, periodic electrical inspection, portable…
Serves B2B and public sector customers across industrial, retail, education, office and local council sectors, including warehouses, schools, colleges and workplaces with lighting and electrical…
Financial Health
HealthyHealthy · -15% CAGR over 4y
Location
Easton Bevins
Trajectory
4y · 2022–NowFinancial sub-scores
Computed from 4 filingsProvides building surveying, architectural design and block and estate management services. Conducts residential and commercial property surveys, fire safety and cladding assessments, valuations and…
Serves commercial and private property clients across the UK, including homeowners, purchasers and leaseholders, landlords, developers, architects, block/estate managers and legal clients involved in…
Financial Health
HealthyHealthy · 0% CAGR over 3y
Location
HEATFLUX LTD
Trajectory
5y · 2021–NowFinancial sub-scores
Computed from 5 filingsFinancial Health
HealthyHealthy
Location
Energy Management Controls Ltd
Trajectory
4y · 2022–NowFinancial sub-scores
Computed from 4 filingsFinancial Health
HealthyHealthy
Location
Trajectory
5y · 2021–NowFinancial sub-scores
Computed from 5 filingsFinancial Health
DistressedDistressed
Location
Provides welding procedure and welder qualification testing and certification, including third‑party surveillance. Conducts non‑destructive testing, radiography, inspection, and mechanical testing of…
Serves businesses and public-sector organisations with welding operations, including fabrication contractors, manufacturers, oil and gas, structural, marine, transport and engineering firms.
Financial Health
Insufficient historyInsufficient history
Location
Provides welding certification and qualification testing services, including welder coding, welding procedure qualification, non-destructive testing, radiography inspection, and mechanical testing of…
Serves B2B and public-sector organisations requiring welding compliance support, including fabrication contractors, manufacturers, oil and gas, structural, marine, transport and engineering…
Financial Health
Insufficient historyInsufficient history
Location
EQUIPTEST ELECTRICAL COMPLIANCE T/A AWE ELECTRICAL LTD
Trajectory
3y · 2022–NowFinancial sub-scores
Computed from 3 filingsProvides electrical compliance testing and inspection services, including portable appliance testing (PAT), fixed wire testing, emergency lighting and fire alarm testing, thermal imaging surveys, and…
Serves large and small UK businesses, landlords and property managers needing workplace or tenant safety compliance, with emphasis on Bristol, Bath, the South West and wider UK markets.
Financial Health
HealthyHealthy · 0% CAGR over 2y
Location
DANTEK ENVIRONMENTAL SERVICES (UK) LTD
Trajectory
3y · 2023–NowFinancial sub-scores
Computed from 3 filingsProvides legionella risk assessments, testing and monitoring, and water hygiene services for building water systems. Services include water tank and showerhead cleaning, sampling and analysis,…
Serves organisations managing single or multiple premises, including compliance and facilities teams, that need water hygiene and Legionella compliance support across Bristol, the South West, South…
Financial Health
StrongStrong · Growing · 4% CAGR over 2y
Location
Willow Tree (South West) Limited
Trajectory
1y · 2024–NowOperates an independent laboratory providing materials and coatings testing, metallurgical analysis, and accelerated environmental testing. Also performs chemical process solution analysis and offers…
Serves manufacturers and private/public-sector contractors in aerospace, defence, automotive and surface engineering, especially coatings and finishing businesses needing accredited materials and…
Financial Health
Insufficient historyInsufficient history
Location
TEDAC SERVICES LIMITED
Trajectory
3y · 2022–NowFinancial sub-scores
Computed from 3 filingsProvides temperature and humidity mapping surveys and validation services for storage facilities, including pharmaceutical and hospital environments. Plans and installs monitoring probes, collects…
Serves pharmaceutical, life science and hospital organisations with regulated storage facilities, including teams responsible for audits, licensing and GxP/WDA(H) compliance.
Financial Health
StableStable · Hiring · 10% CAGR over 2y
Location
ASH LIFE SCIENCES LTD
Trajectory
5y · 2021–NowFinancial sub-scores
Computed from 5 filingsProvides calibration, maintenance, repair and supply of analytical and process instrumentation used in pharmaceutical and life science environments, including TOC analysers, particle counters and…
Serves B2B customers in pharmaceutical and life sciences manufacturing, including GMP-regulated labs and production sites using analytical and process instrumentation, across the UK and…
Financial Health
StableStable · 0% CAGR over 4y
Location
Code A Weld Holdings Limited
Trajectory
3y · 2023–NowFinancial sub-scores
Computed from 3 filingsProvides welding certification and testing services including welder qualification tests, welding procedure qualification, non-destructive testing, radiographic inspection, and mechanical testing.…
Serves engineering, fabrication and manufacturing businesses, plus transport and public-sector organisations, across sectors such as oil and gas, structural, marine and industrial equipment.
Financial Health
StrongStrong · Growing, Hiring · 12% CAGR over 2y
Location
INDEX MICROBIOLOGY LIMITED
Trajectory
5y · 2021–NowFinancial sub-scores
Computed from 5 filingsProvides microbiological testing services for water, environmental and related samples. Conducts sample collection, laboratory analysis and interpretation of results, and advises clients on managing…
Serves private and public sector organisations in the South West that require microbiological testing and advice for water, environmental and associated samples, including public health-related…
Financial Health
StrongStrong · Growing, Hiring · 11% CAGR over 4y
Location
Building Analysis & Testing Limited
Trajectory
5y · 2021–NowFinancial sub-scores
Computed from 5 filingsProvides air tightness, air leakage and acoustic sound insulation testing for residential, commercial and industrial buildings to support Building Regulations compliance. Also conducts thermal…
Serves construction-sector businesses and project teams across England and South Wales, including developers, architects, design teams and building contractors working on commercial, residential and…
Financial Health
StableStable · 0% CAGR over 4y
Location
NDT & Inspection UK Limited
Trajectory
2y · 2024–NowFinancial sub-scores
Computed from 2 filingsProvides non-destructive testing and welding inspection services for engineering sectors including nuclear, oil and gas, aerospace, rail and structural. Services include radiographic, ultrasonic,…
Serves B2B clients in nuclear, oil and gas, aerospace, rail and structural engineering, including organisations responsible for welds, castings, forgings and material integrity.
Financial Health
StrongStrong · Hiring · 100% CAGR over 1y
Location
Tank Testing UK Ltd
Trajectory
5y · 2021–NowFinancial sub-scores
Computed from 5 filingsFinancial Health
WeakWeak
Location
One Scientific
Trajectory
3y · 2023–NowFinancial sub-scores
Computed from 3 filingsProvides microbiological, chemical and molecular laboratory testing for food, drink and water samples. Also supplies laboratory media and equipment, conducts shelf‑life and contamination…
Serves B2B clients in the food and water industries, including food, drink and dairy manufacturers, ingredient suppliers and laboratories with safety, quality and compliance testing needs.
Financial Health
StrongStrong
Location
JOHN D HILL ELECTRICAL LIMITED
Trajectory
5y · 2021–NowFinancial sub-scores
Computed from 5 filingsProvides commercial electrical testing, inspection and certification services for businesses and property portfolios. Conducts EICR reports, compliance testing and electrical safety inspections, and…
Sells to businesses and organisations needing commercial electrical compliance, especially housing associations, education providers, building contractors and private landlords, including landlords…
Financial Health
StrongStrong · Hiring · 10% CAGR over 4y
Location
C.W.E. Services Limited
Trajectory
5y · 2021–NowFinancial sub-scores
Computed from 5 filingsProvides asbestos consultancy services including building asbestos surveys, sampling, laboratory bulk sample analysis, analytical testing, asbestos management plans, and project management for…
Serves building owners, occupiers and duty holders in the South of England, including those responsible for commercial, industrial or public premises requiring asbestos compliance support.
Financial Health
StableStable · Hiring · 3% CAGR over 4y
Location
Armour Analytical Services Limited
Trajectory
5y · 2021–NowFinancial sub-scores
Computed from 5 filingsProvides asbestos surveying and consultancy services, including management, refurbishment and demolition surveys, bulk sampling and air monitoring. Produces asbestos management plans, risk…
Serves UK businesses, property owners and homeowners, including facilities managers, landlords, construction and refurbishment teams, and domestic clients.
Financial Health
WeakWeak · Hiring · 5% CAGR over 4y
Location
Primary Water Solutions Limited
Trajectory
3y · 2023–NowFinancial sub-scores
Computed from 3 filingsProvides water hygiene and treatment services including Legionella risk assessments, water system monitoring, cleaning and disinfection, sampling, and consultancy. Also delivers compliance support,…
Serves B2B and public-sector organisations managing buildings and water systems, including education, healthcare, industrial, local authority, facilities management, commercial, housing, hotel and…
Financial Health
HealthyHealthy · Hiring · 36% CAGR over 2y
Location
ABBEY LIFTS LIMITED
Trajectory
5y · 2021–NowFinancial sub-scores
Computed from 5 filingsProvides independent LOLER inspections for lifts and lifting equipment, separate from maintenance providers. Conducts statutory examinations, compliance reporting, and inspection scheduling to help…
Serves businesses, building owners and facilities managers responsible for passenger or goods lifts, particularly those requiring independent compliance oversight separate from their routine lift…
Financial Health
HealthyHealthy · -14% CAGR over 4y
Location
Kemish Engineering Designs Ltd
Trajectory
4y · 2021–NowFinancial sub-scores
Computed from 4 filingsFinancial Health
DistressedDistressed
Location
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How Bristol TIC companies work and how to sell to them
What they do
TIC providers make money from technical services that turn measurements, inspections and audits into defensible evidence. Revenue usually comes from fixed-fee site visits, day-rate engineering or laboratory work, calibration schedules, certification support and repeat inspection programmes, with some retainers where customers need periodic checks. Pricing tends to reflect technician time, travel, equipment, reporting effort and accreditation scope rather than pure software-style usage. The offer is part consultancy, part field operation and part controlled process: a customer pays not just for a test result, but for a method, chain of custody, traceable records and a report that can stand up to customer, insurer or regulator scrutiny.
Who they sell to
Most Bristol TIC sellers work through operational buying centres. Typical customers include manufacturers, building-services contractors, engineering firms, environmental operators, facilities teams and safety-led organisations that need third-party evidence before work can proceed or goods can be accepted. Day-to-day sponsors are often quality managers, compliance leads, HSE managers, operations directors, engineering managers or facilities heads; procurement usually appears once work becomes recurring or framework-based. Sales cycles are often short for urgent inspections and longer where accreditation, method validation or approved-supplier status is involved. New suppliers tend to win through direct technical conversations, referral, local reputation and pre-qualification documents, rather than a self-serve purchasing journey.
What they buy
Most TIC firms tend to spend on tools and services that protect utilisation, traceability and technical competence. Relevant categories include job scheduling, field-service management, laboratory information management, calibration tracking, document control, quality management, audit evidence storage, CRM and finance systems that can handle repeat work orders and certificates. They also buy specialist equipment, equipment maintenance, metrology support, vehicles, insurance, technical training, accreditation consultancy, recruitment and outsourced accounting. Digital suppliers should expect practical objections: technicians may work on customer sites, reports must be auditable, and any new system has to fit existing methods rather than force a wholesale change to approved procedures.
Why and how to sell to them
TIC buyers tend to evaluate vendors when admin starts to interfere with billable technical work, when audit findings expose weak document control, or when a new customer requires clearer evidence trails. Other triggers include new accreditation scopes, senior quality or operations hires, premises changes, recurring inspection contracts and investment in laboratory or field equipment. The useful sales angle is usually risk reduction with less manual handling: fewer missed calibration dates, faster certificate production, cleaner audit packs and clearer visibility of job profitability. Claims need to be specific and operational. A pitch that shows how the offer supports existing procedures will usually land better than one framed around replacing how technicians work.
How this list is built
Data sources
This list is built from UK Companies House filings, XBRL accounts data, and semantic analysis of each company's public website. 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.
Classification
Rather than relying solely on SIC codes, Firmbase classifies each company semantically: the company's website is crawled, an AI model reads what the company actually sells, and the company is placed into the relevant industry and subsectors. SIC codes are used as one signal but not the only one. This means a company that registered under a generic SIC code but pivoted into (for example) fintech is correctly identified as fintech, not as its original SIC category.
Freshness
The underlying company data is refreshed from Companies House continuously; filings appear in the list within days of submission. The curated list ordering is regenerated when the underlying data moves meaningfully (company count changes by more than 5%, a new company enters the top-ranked segment, or the filed-revenue numbers for the top firms change). You can see the last-updated timestamp near the top of the page.
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Frequently asked questions
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