Renewable Energy Companies Using reCAPTCHA in the UK: 917 Active Firms (2026)
Renewable-energy businesses using website bot checks develop, generate or supply low-carbon power in the UK within OFGEM-regulated markets.
For renewable-energy operators, bot-checking tends to sit at the edge of enquiry, connection, support and supplier-contact journeys rather than inside generation systems. It signals a direct-channel posture: these firms expect inbound contact from customers, landowners, developers, installers or commercial counterparties, and have enough public web traffic or spam exposure to justify form protection. Ownership usually sits between marketing, customer operations and IT, not plant engineering. In this sector, adoption is more common among businesses with live projects, operating assets, grid-services work or energy-supply relationships than among holding entities with only a statutory presence.
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The UK adoption cohort comprises 917 trading renewable-energy businesses running the bot-checking tool, with reported employment of 2,023 people. It ranks first in detected security-tool adoption within renewable energy, at 91.5%, which makes it the default pattern rather than a specialist exception. Registered-address skew is spread across several regions: South East 13.0%, London 12.9%, South West 12.0%, East of England 11.5% and North West 9.6%. The regional pattern fits a sector split between project developers, asset operators, field-service firms and supply businesses, rather than a purely metropolitan software-adoption story.
Generating, moving or supplying energy in Great Britain brings bot-checking into a regulated operating setting, even though the control itself sits on the public website. Ofgem licensing attaches standard and, where relevant, special conditions once permissions are granted. Renewable-support administration also leaves a long tail of compliance work: the Renewables Obligation is closed to new generating capacity, but accredited stations still face audit checks and generation reporting for certificates. Contact-form protection therefore tends to sit beside supplier onboarding, customer support and project-enquiry controls, with procurement attention on uptime, privacy notices and ownership of external scripts.
Adoption appears likely to remain tied to form-heavy public websites rather than operational energy systems. Renewable-energy operators with direct customer, landowner or partner journeys tend to keep bot checks in place because abuse prevention is cheaper than manual triage, but procurement scrutiny can make externally hosted scripts less automatic. Website rebuilds, hosting consolidation and privacy reviews may push some firms toward bundled security controls. Smaller project developers appear more likely to stay with familiar content-management plug-ins, while suppliers with larger customer operations tend to formalise ownership between marketing, customer service and IT.
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 reCAPTCHA rises with company size across the trading UK Renewable energy companies in this cohort. 24.1% of the 2,672 companies with under 10 employees run reCAPTCHA (645 detected). 29.4% of the 824 companies with 10–50 employees run reCAPTCHA (242 detected). 29.7% of the 74 companies with over 50 employees run reCAPTCHA (22 detected). That is a 5.6% gap between the over 50 employees and under 10 employees bands.
917
Active firms
2026
91.5%
Of detected Security share
UK Renewable energy
6
Median headcount
Filed accounts
2,094
Verified directors
Across this cohort
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Key facts
About 5% of the trading cohort reports turnover above £5M (55 of 917 firms) — the rest sits below that revenue band.
9% of the cohort was incorporated since 2022 (87 firms), so a sizeable share is in its first few filing cycles.
Within renewable energy, the detected security category is concentrated: one bot-check tool accounts for 91.5% (917) of the 1,002 companies with a detectable system.
The stack is usually content-led: the most common detected content-management system appears on 80.0% (734), the most common analytics tag on 58.1% (533), and the most common tag-management tool on 33.2% (304).
Registered offices skew towards southern English regions: South East 13.0% (119), London 12.9% (118), South West 12.0% (110), and East of England 11.5% (105).
Companies that generate, move or supply energy in Great Britain need an Ofgem licence and must comply with standard and any special licence conditions once granted.
UK renewables generated 50.8% of UK electricity in 2024, up from 46.4% in 2023, with output reaching 144.7 terawatt hours.
Security market share among UK Renewable Energy
Share of the 1,002 UK Renewable Energy with a detectable system. As of June 2026.
What else do reCAPTCHA-running Renewable Energy run?
Share of the 917 reCAPTCHA-running UK companies where each technology was also detected. As of June 2026.
Where reCAPTCHA Renewable Energy are, and how healthy they look
By region
By registered-office region; companies without a regional match count toward Rest of UK.
By financial health
From filed accounts; firms with fewer than two filings show as insufficient history.
6
Median headcount
£621.8K
Median UK turnover
6%
Above £5M turnover
87
Incorporated since 2022
Verified directors — included in the file
Director names and roles for these 1,710 companies, alongside financials and websites, in one CSV file.
Top UK Renewable Energy using reCAPTCHA
Ranked by sales-readiness score: an AI model assesses what each company does, its sector and size, and scores its overall fit. Best-fit prospects appear first.
Financial sub-scores
Computed from 5 filingsGenerates electricity from biomass and hydro power stations, produces and sells wood pellets for energy, supplies business electricity and energy services, and develops carbon capture and energy…
Serves businesses, utilities and public-sector stakeholders, including corporate energy buyers, biomass pellet customers, power-sector partners and organisations interested in carbon removals in the…
Financial Health
StableStable
Location
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Financial sub-scores
Computed from 4 filingsDevelops, builds, owns and operates renewable energy projects including solar farms and battery energy storage systems. Manages project development, planning, construction and operation of…
Targets UK landowners, renewable energy investors, utilities and independent power producers, with large-scale solar and battery schemes intended to serve local communities and households.
Financial Health
StableStable · Hiring · 114% CAGR over 4y
Location
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Computed from 4 filingsDevelops, owns and operates solar photovoltaic (PV) and battery energy storage system (BESS) projects. Manages project lifecycles including site identification, planning, financing, construction and…
Serves landowners, local communities, developers and businesses, including data centres, seeking renewable energy partnerships linked to solar PV and battery storage projects.
Financial Health
StrongStrong · Hiring · 66% CAGR over 3y
Location
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Computed from 3 filingsSupplies electricity and gas to business customers, including tariffs sourced from UK wind farms and other renewable sources. Provides business energy contracts, half‑hourly electricity supply, smart…
Serves UK business energy customers, including care homes, education providers, manufacturers, hospitality businesses and charities seeking electricity, gas, half-hourly supply or renewable tariffs.
Financial Health
StableStable · -93% CAGR over 2y
Location
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Computed from 5 filingsInvests in, develops and operates renewable energy and battery storage projects, including onshore wind and solar installations. Provides asset management, power supply and optimisation services, and…
Targets institutional investors, large power users, landowners, communities and public sector bodies in renewable energy and battery storage markets across Asia, Australia, UK/Europe and the USA.
Financial Health
StrongStrong
Location
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Computed from 5 filingsDevelops utility-scale renewable energy projects, focusing on solar farms and battery energy storage systems. Provides project development, partner coordination and asset management across the…
Serves UK commercial energy users, landowners, and renewable energy asset owners or investors involved in solar, battery storage, business energy, and asset management projects.
Financial Health
StableStable · Hiring · 27% CAGR over 4y
Location
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Computed from 5 filingsDevelops utility-scale solar photovoltaic projects, focusing on subsidy-free solar farms. Manages project development activities including site identification, landowner engagement, planning and…
Serves UK landowners, local communities and energy-sector stakeholders involved in large-scale solar PV project development.
Financial Health
HealthyHealthy · 0% CAGR over 4y
Location
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Computed from 5 filingsSupplies electricity and gas to business customers, offering fixed-term tariffs, renewable electricity and carbon-neutral gas options. Provides energy contract management for SMEs and multi-site…
Serves UK businesses needing energy supply, including SMEs, large accounts and multi-site organisations seeking electricity, gas, renewable electricity or carbon-neutral gas contracts.
Financial Health
StableStable · -35% CAGR over 5y
Location
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Computed from 5 filingsProvides development, grid strategy and asset management services for energy infrastructure projects. Works across the lifecycle from project origination and planning to grid connection delivery and…
Serves B2B energy-sector clients, including developers, owners and investors in renewable power assets such as solar parks and battery storage projects.
Financial Health
StrongStrong · Hiring · 34% CAGR over 4y
Location
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Computed from 5 filingsDevelops, finances, builds and operates projects in the energy and controlled‑environment agriculture sectors. Activities include combined heat and power plants, gas peaking, battery storage and…
Serves horticultural growers, controlled-environment agriculture businesses, commercial and industrial energy users, construction funders and landowners involved in UK sustainable energy projects.
Financial Health
HealthyHealthy
Location
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Computed from 5 filingsDevelops geothermal energy projects including power plants and heat networks, and projects to extract lithium from geothermal brines. Carries out drilling, resource development and infrastructure for…
Targets clean energy investors, infrastructure funders, and industrial buyers in the energy and lithium supply chains, with emphasis on UK geothermal power, heat, and low-carbon lithium projects.
Financial Health
StableStable · -58% CAGR over 4y
Location
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Computed from 5 filingsSupplies gas and electricity to commercial customers. Offers renewable gas options such as biomethane, energy management and switching support for consultants, and utility connection services…
Serves UK commercial energy customers, including SMEs and larger businesses, plus energy consultants managing business clients that need gas, electricity or utility connection services.
Financial Health
StableStable · -68% CAGR over 4y
Location
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Computed from 4 filingsDevelops renewable energy projects focused on utility‑scale solar farms and grid‑scale battery storage systems. Works with landowners to identify and develop sites and manages the planning and…
Targets landowners and energy-sector partners with sites suitable for utility-scale solar and grid-scale battery storage projects, primarily in a B2B infrastructure development context.
Financial Health
StableStable
Location
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Computed from 5 filingsDevelops, acquires and manages electricity transmission infrastructure projects, including offshore transmission assets, interconnectors and grid substations. Provides project development,…
Serves B2B clients in UK electricity transmission, including infrastructure investors, offshore wind transmission owners, interconnector developers, utilities, regulators and other energy-sector…
Financial Health
StrongStrong
Location
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Computed from 5 filingsDesigns and delivers renewable energy systems for commercial and public sector clients, including rooftop and ground‑mount solar PV, solar farms, battery storage and EV charging. Provides project…
Serves commercial, industrial and public sector organisations, including logistics, foodservice, manufacturing and facilities-based businesses seeking to manage energy costs and sustainability…
Financial Health
HealthyHealthy · -49% CAGR over 5y
Location
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Computed from 4 filingsDevelops and operates a solar photovoltaic park generating renewable electricity, forming part of a portfolio of utility‑scale solar energy projects developed and managed for grid‑connected power…
Serves B2B and institutional customers involved in renewable energy and circular economy projects, including infrastructure investors, financing partners, utilities, and industrial organisations…
Financial Health
StrongStrong · Profitable
Location
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Computed from 5 filingsDevelops and manages renewable energy projects, including wind power generation. Works with landowners to identify and develop sites for clean power infrastructure and collaborates on peatland…
Serves UK energy buyers and grid stakeholders, landowners and tenants involved in renewable energy or peatland projects, and local communities around clean energy developments.
Financial Health
HealthyHealthy · Hiring · 37% CAGR over 4y
Location
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Computed from 5 filingsDevelops renewable energy projects focusing on utility-scale solar photovoltaic farms. Manages site identification, planning and development of subsidy‑free solar PV projects and a pipeline of…
Serves UK landowners, local communities and energy-sector stakeholders involved in large-scale solar PV sites, including parties affected by land rights, planning and consultation.
Financial Health
StrongStrong
Location
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Computed from 5 filingsDevelops and installs commercial renewable energy systems including wind turbines and solar photovoltaic installations. Provides project development, private wire power purchase agreements,…
Serves UK businesses seeking on-site renewable energy, including commercial solar, wind and storage customers, plus organisations that own or operate renewable energy assets needing ongoing…
Financial Health
StrongStrong
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Computed from 5 filingsDevelops and delivers commercial renewable energy projects including wind turbines, solar PV rooftop and ground‑mounted systems, and energy storage. Provides project development, installation,…
Serves UK businesses, commercial property owners and renewable asset owners, including organisations with sites suitable for rooftop or ground-mounted solar, single turbines or small wind…
Financial Health
HealthyHealthy · Hiring · 15% CAGR over 4y
Location
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Computed from 5 filingsDevelops and operates renewable energy projects including anaerobic digestion and biogas systems. Designs and installs commercial solar PV installations and provides energy trading, renewable…
Sells to businesses and energy-sector partners seeking renewable solutions, especially corporations across the UK and Ireland needing commercial Solar PV, biogas and anaerobic digestion projects,…
Financial Health
StableStable · -16% CAGR over 4y
Location
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Computed from 4 filingsDevelops utility-scale solar farm projects across Britain. Works with landowners to identify sites, secure planning permission, and manage development of solar parks for renewable electricity…
Serves landowners in England and Wales with suitable sites for solar farms, alongside investors seeking participation in UK solar energy projects.
Financial Health
StableStable · -81% CAGR over 3y
Location
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Computed from 4 filingsDevelops and repowers wind farm projects, working with landowners and project owners to replace older turbines with modern equipment and improve generation capacity. Focuses on the development of…
Serves landowners and owners of existing mid-sized wind farm projects, particularly those seeking commercial partnerships in Scotland, North West England and South West England.
Financial Health
HealthyHealthy · -7% CAGR over 3y
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Computed from 4 filingsProvides installation, maintenance and servicing for renewable energy systems including wind turbines, solar PV, combined heat and power (CHP) and high‑voltage infrastructure. Supports planning,…
Serves landowners, renewable energy developers and manufacturers involved in wind, solar, CHP and battery storage projects across the UK.
Financial Health
StrongStrong · Growing · 0% CAGR over 3y
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Computed from 5 filingsProvides high‑voltage electrical engineering services for transmission and distribution networks, including commissioning at 400kV and 275kV, protection and control system testing, factory acceptance…
Serves B2B clients in electrical transmission and distribution, including transmission system operators, renewable and nuclear generation projects, offshore wind farms, substations and high-voltage…
Financial Health
HealthyHealthy · Hiring · 6% CAGR over 4y
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Computed from 5 filingsDevelops, manufactures and supplies solar power systems and renewable energy solutions. Integrates technologies such as solar generation, wind, hydro and energy storage, and provides grid…
Serves businesses and utilities, including technology and data centre operators, mining and metals companies, commercial and industrial energy users, and utilities and cooperatives.
Financial Health
StrongStrong · Growing, Hiring · 19% CAGR over 4y
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Computed from 5 filingsProvides engineering, procurement and construction (EPC) services for renewable energy projects. Develops investment opportunities, designs and builds utility‑scale and rooftop installations, and…
Serves B2B clients in the renewable energy sector, including investors, project owners and commercial customers developing utility-scale and rooftop installations across European markets.
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StrongStrong · Hiring · 7% CAGR over 4y
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Computed from 5 filingsProvides engineering services for onshore wind turbines, including maintenance and servicing of 500kW–3MW turbines. Supplies turbine components and parts through an online catalogue covering…
Serves onshore wind farm owners, operators and renewable energy utilities in Scotland and across the UK, particularly organisations managing 500kW–3MW turbines and sourcing wind turbine servicing or…
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StrongStrong · Growing, Hiring · 34% CAGR over 4y
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Computed from 3 filingsProvides managed maintenance and operational support services for offshore and onshore wind farms, including supply of technicians and inspectors, turbine inspections, balance of plant services, oil…
Serves B2B clients in the offshore and onshore wind energy sector, including wind farm owners, operators, asset managers and OFTO asset holders across the UK and North West Europe.
Financial Health
StrongStrong · Hiring · 15% CAGR over 2y
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Computed from 3 filingsInvests in and finances sustainable energy development projects, partnering with renewable energy developers to fund and build portfolios of solar PV and energy storage projects and manage capital…
Serves B2B sustainable energy development companies, especially solar, storage and other zero-carbon project developers assembling large-scale project portfolios for institutional-standard investment.
Financial Health
HealthyHealthy · 0% CAGR over 2y
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Computed from 3 filingsDesigns, installs and maintains energy infrastructure including solar photovoltaic systems, electric vehicle charging stations, battery storage systems and grid connections. Also develops and…
Serves commercial customers pursuing net-zero energy projects, including service stations, car dealerships, farms, hotels and leisure operators, with some domestic customers also referenced.
Financial Health
HealthyHealthy · Hiring · 25% CAGR over 2y
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Computed from 5 filingsAdvises renewable energy generators and investors on power and gas sales. Structures and negotiates power purchase agreements, manages route-to-market trading, and trades environmental certificates…
Serves B2B and public-sector clients in renewable energy, including generators, private developers, investors, large landowners, institutional funds, private estates, local authorities and financial…
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StrongStrong · Growing, Hiring · 19% CAGR over 4y
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Computed from 5 filingsProvides retrofit and energy services for social housing, installing technologies such as solar panels and batteries, aggregating homes to purchase electricity and participate in flexibility markets,…
Serves UK social housing landlords and their residents, alongside institutional investors and funders focused on climate and social-impact opportunities in housing retrofit and energy efficiency.
Financial Health
StrongStrong · Hiring · 47% CAGR over 4y
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Computed from 4 filingsProvides engineering, procurement and construction (EPC) services for renewable energy projects, including solar PV plants and battery energy storage systems. Also offers project and quality…
Serves renewable energy developers, asset owners and commercial organisations pursuing solar PV parks, battery storage and hydrogen projects, with clients across Europe and the Middle East.
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StrongStrong · Growing, Hiring · 17% CAGR over 4y
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Computed from 5 filingsProvides asset management services for community‑owned renewable energy projects, including operational management, finance and accounting, regulatory compliance, board support, and performance…
Serves UK community energy organisations, cooperatives and community groups that own renewable energy assets, including solar PV and hydro projects, as well as boards needing asset, finance and…
Financial Health
HealthyHealthy · Hiring · 15% CAGR over 4y
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Computed from 5 filingsDevelops, owns and operates power generation assets and energy projects, including diesel and renewable power plants. Invests in and manages a portfolio of electricity generation projects, with a…
Financial Health
WeakWeak · -11% CAGR over 4y
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Computed from 5 filingsCollects, transports and processes food and liquid waste using anaerobic digestion at a biogas plant. Converts organic waste into renewable energy and PAS110-certified biofertiliser, providing food…
Sells to businesses and organisations generating food and liquid waste, including companies seeking waste management and recycling support to meet environmental targets, and agricultural users of…
Financial Health
HealthyHealthy · Hiring · 14% CAGR over 4y
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Computed from 2 filingsProvides technical, financial and commercial advisory and asset management services for renewable energy projects. Supports lenders, investors and asset owners with due diligence, energy yield…
Serves B2B clients in renewable energy, especially lenders, investors and asset owners involved in wind, solar and battery storage projects. Targets organisations developing, financing, acquiring,…
Financial Health
StrongStrong · Hiring · 63% CAGR over 1y
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Computed from 5 filingsProvides operations and maintenance services for solar power plants, including remote monitoring, corrective and preventative maintenance, repowering and inverter installation, spare parts…
Serves owners, operators, investors and asset managers of utility-scale solar power stations and battery storage sites in the solar industry, with customers in the UK and internationally.
Financial Health
HealthyHealthy · -67% CAGR over 4y
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Computed from 4 filingsProvides construction and installation services for renewable energy projects, specialising in ground‑mounted solar farms. Carries out piling, mechanical and electrical installation, and supports…
Serves UK renewable energy developers, solar farm owners and EPC partners delivering ground-mounted solar projects, plus commercial organisations planning rooftop solar or other renewable energy…
Financial Health
StrongStrong · Growing, Hiring · 150% CAGR over 3y
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Computed from 3 filingsProvides inspection, repair, maintenance, and installation services for onshore and offshore wind turbines. Offers blade servicing, high-voltage and electrical work, pre‑assembly and construction…
Serves B2B customers in the renewable energy sector, primarily wind turbine manufacturers, wind farm owners and operators, and related supply-chain clients across onshore and offshore wind markets.
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StrongStrong · Profitable, Growing, Hiring · 47% CAGR over 2y
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Computed from 4 filingsProvides independent connection provider (ICP) services for electricity networks, including network analysis, design, installation, energisation and maintenance of grid connections. Also designs and…
Serves UK businesses, developers, utilities and industrial/commercial organisations, including renewable energy projects, EV fleet and hub operators, car park owners, residential developers, haulage…
Financial Health
StrongStrong · Growing, Hiring · 82% CAGR over 4y
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Computed from 5 filingsOperates the Mean Moor wind farm, consisting of three Enercon wind turbines generating renewable electricity. Part of a community energy project associated with High Winds Community Energy Society,…
Targets individual members and community investors interested in co-operative renewable energy ownership, with local communities in south Cumbria engaged
Financial Health
HealthyHealthy · -16% CAGR over 4y
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Computed from 3 filingsDesigns and installs commercial renewable energy systems including rooftop, ground‑mounted and carport solar PV, battery storage and LED lighting. Provides feasibility studies, project development,…
Serves businesses and public-sector organisations, including manufacturing, leisure, commercial real estate, education providers, councils and retailers seeking to reduce energy costs and carbon…
Financial Health
StrongStrong · Growing, Hiring · 34% CAGR over 2y
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Computed from 3 filingsDesigns, installs and maintains renewable energy and energy efficiency systems for commercial and public sector buildings, including solar PV, EV charging infrastructure, energy storage, and heat…
Serves B2B and public sector buyers across the UK, including construction, agricultural, commercial, industrial, education and healthcare organisations, plus warehouses, cold storage and leisure…
Financial Health
StrongStrong · Profitable, Hiring · 13% CAGR over 2y
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Computed from 5 filingsDesigns, supplies and installs solar photovoltaic systems, battery energy storage and electric vehicle charging infrastructure for homes, businesses and public sector organisations. Also provides…
Serves UK homeowners, businesses, schools, universities, councils and other public-sector bodies, including offices, factories, warehouses, farms, community energy groups and new-build developers.
Financial Health
WeakWeak · -33% CAGR over 4y
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Computed from 3 filingsDesigns and installs commercial renewable energy systems including roof- and ground-mounted solar PV arrays, solar carports, battery energy storage and electric vehicle charging infrastructure, and…
Serves businesses across the north of England, including commercial organisations in varied sectors seeking to reduce energy costs, cut carbon emissions, and manage on-site energy generation and EV…
Financial Health
HealthyHealthy · Hiring · 22% CAGR over 2y
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Computed from 5 filingsDesigns, manufactures and operates renewable and gas‑powered combined heat and power (CHP) and power generation systems for industrial, commercial and data centre sites. Also provides installation,…
Serves carbon-conscious businesses and organisations across the UK and Ireland, including data centres, education estates and industrial operators needing onsite decarbonisation and energy security.
Financial Health
StrongStrong · Hiring · 17% CAGR over 4y
Location
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Financial sub-scores
Computed from 5 filingsProvides operations and maintenance services for small and medium-scale wind turbines, including condition monitoring, repairs, upgrades and repowering. Also supports new turbine installations and…
Serves UK owners of small and medium-scale wind turbines, especially farmers, agricultural businesses and high-energy commercial sites, from single-turbine operators to portfolio owners.
Financial Health
StableStable · -46% CAGR over 5y
Location
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Computed from 5 filingsProvides technical services to onshore and offshore wind farms, including turbine blade inspection, repair and maintenance, high‑voltage works, balance‑of‑plant support, installation, operations and…
Serves B2B customers in the onshore and offshore wind energy sector, including wind farm owners, operators, utilities, developers and contractors needing technical support across global wind projects.
Financial Health
StrongStrong · Hiring · 32% CAGR over 4y
Location
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How reCAPTCHA 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. Renewable energy companies are identified using Firmbase's semantic classification of company activity, built from filings, websites and registered SIC codes rather than SIC codes alone. The detected counts and share figures on this page are computed within that sector cohort, so "share" always means share of Renewable energy companies with a detectable system — not of all UK companies.
Freshness
Websites are re-crawled on a rolling basis and the underlying company data is refreshed from Companies House continuously; filings appear within days of submission. The list and its statistics are regenerated when the detected cohort moves meaningfully. You can see the last-updated timestamp near the top of the page.
reCAPTCHA is a trademark of its respective owner. Firmbase is not affiliated with, sponsored by, or endorsed by the trademark owner.
UK Renewable Energy by Security
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Frequently asked questions
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