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Climate tech Companies in London: 200+ Active Firms (2026)
Climate tech companies in London build carbon measurement, reduction and climate-risk services for businesses, investors and public bodies.
Buying activity tends to sit with finance, sustainability, property, infrastructure and risk teams rather than a dedicated climate budget holder. London suppliers usually sell to business-to-business, public-sector and investor customers that need auditable carbon reporting, reduction plans, climate-risk analysis or low-carbon delivery support. Engagements range from specialist advisory projects and implementation work to recurring software or managed-service contracts, with higher-value work tied to estate portfolios, infrastructure programmes and regulated reporting. The practical buyer test is evidence: outputs have to translate into compliance packs, board reporting, procurement submissions or capital-allocation decisions.
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London has 276 actively trading climate tech companies in this cohort, giving the capital a sizeable, specialist market rather than a narrow set of consultants. Reported employment across the group is 1,517 people, which points to a long tail of small teams alongside a smaller set of mid-market employers. The commercial centre of gravity sits close to corporate reporting, real-estate decarbonisation, infrastructure resilience and investor due diligence, where London buyers can purchase technical advice, software-enabled measurement and delivery capacity from local suppliers.
Regulation is felt through buyer obligations more than through a dedicated climate-tech rulebook. Public bodies and infrastructure customers tend to ask for defensible baselines, transparent assumptions and procurement-ready evidence. Commercial buyers usually focus on carbon accounting, reduction pathways and risk outputs that can survive finance, audit and investor scrutiny. That market structure favours firms able to combine technical climate knowledge with implementation discipline, because a neat dashboard is rarely enough when the customer needs changes to buildings, fleets, supply chains or capital plans.
Customer demand appears practical rather than speculative. Clients still want measurement, but demand tends to move towards reduction work, resilience planning and evidence that can be used in governance processes. Early-commercial firms may find room in specialist niches, although scale-up scarcity is likely where sales depend on long procurement cycles and expert delivery teams. Consolidation has been a plausible path for advisory-led operators, while software-led firms need to show that recurring revenue is supported by customer retention rather than project-based reporting work.
276
Active firms
2026
23
Above £5M
revenue band
52
Since 2022
recent incorporations
Key facts
About 8% of the trading cohort reports turnover above £5M (23 of 276 firms) — the rest sits below that revenue band.
18% of the cohort was incorporated since 2022 (52 firms), so a sizeable share is in its first few filing cycles.
Buyer demand tends to come from businesses, investors and public bodies that need carbon measurement, emissions-reduction and climate-risk services.
London suppliers sell a mix of tools, analysis and operating services rather than a single climate-tech model.
Commercial, investor and public-sector buyers create several go-to-market routes, from advisory-led sales to recurring software contracts.
Top London climate tech companies
Neuer Energy Limited
Trajectory
3y · 2022–NowFinancial sub-scores
Computed from 3 filingsDevelops software for carbon accounting and sustainability management. Provides a SaaS platform that collects and analyses emissions data, tracks Scope 1–3 greenhouse gas emissions, sets reduction…
Serves B2B and public-sector buyers, including start-ups, multinationals, industrial firms, corporate sustainability and supply-chain teams, ports, pharmaceutical companies, local councils and…
Financial Health
StableStable · Hiring · 80% CAGR over 2y
Location
SOUTH POLE LOCAL LTD
Trajectory
5y · 2021–NowFinancial sub-scores
Computed from 5 filingsProvides climate consulting and environmental market services to businesses, including emissions measurement and reporting, net‑zero strategy development, supply chain decarbonisation, carbon credit…
Sells to businesses, public sector bodies and philanthropic organisations seeking net zero and decarbonisation support, particularly in aviation, energy and utilities, fashion, finance, food and…
Financial Health
StrongStrong · Hiring · 9% CAGR over 4y
Location
Carbon Responsible Ltd
Trajectory
5y · 2021–NowFinancial sub-scores
Computed from 5 filingsProvides carbon accounting and emissions measurement services for businesses, using software and data analysis to measure and verify greenhouse gas emissions, audit supply‑chain data, produce…
Serves businesses across diverse sectors, including organisations with complex supply chains and investment portfolios, targeting sustainability, finance and compliance teams responsible for carbon…
Financial Health
WeakWeak · Hiring · 66% CAGR over 4y
Location
Climate Risk Services Ltd
Trajectory
3y · 2023–NowFinancial sub-scores
Computed from 3 filingsProvides climate risk advisory, data analytics and software tools for organisations and financial institutions. Offers a platform assessing physical, transition and nature-related risks, plus…
Serves B2B organisations, including development finance bodies, impact investors, financial institutions, and corporates in mining, electrics, agriculture, and food and beverage.
Financial Health
WeakWeak · Hiring · 35% CAGR over 2y
Location
PREOPTIMA LTD
Trajectory
3y · 2023–NowFinancial sub-scores
Computed from 3 filingsDevelops software tools for assessing and managing the whole‑life carbon impact of building projects. Provides platforms that analyse design options, generate embodied carbon data, and support…
Serves built-environment professionals involved in early-stage building design and carbon assessment, plus UK local planning authorities and councils reviewing whole-life carbon submissions for…
Financial Health
StableStable · 0% CAGR over 2y
Location
ERM
Provides sustainability and environmental consulting and advisory services to businesses and investors, including climate and net‑zero strategy, environmental, health and safety management, due…
Serves businesses, investors and public-sector organisations seeking sustainability, ESG and risk advice, especially large organisations in chemicals, financial services, manufacturing, mining, oil…
Location
Footprint Limited
Trajectory
5y · 2021–NowFinancial sub-scores
Computed from 5 filingsProvides carbon management and sustainability services for organisations, including carbon footprint measurement, emissions reporting, net zero target setting, and compliance support. Develops carbon…
Sells to businesses and public sector organisations seeking carbon measurement, Net Zero planning and compliance support, including multi-site firms, supply chains, product teams, airlines and…
Financial Health
DistressedDistressed · 0% CAGR over 4y
Location
Provides sustainability and environmental consulting services including advisory, planning and assessment, engineering and design, and environmental science support. Advises organisations across…
Serves businesses and public sector organisations facing complex sustainability challenges, especially in energy, mining, finance, industry and technology, government, infrastructure and the built…
Location
Longevity Partners
Provides sustainability consulting services to the real estate sector, including energy and net‑zero carbon audits, sustainable building design, sustainability due diligence, green building…
Serves B2B real estate investors, developers and occupiers across office, retail, logistics, transport, digital infrastructure, residential, mixed-use and hospitality assets in Europe, North America…
Financial Health
Insufficient historyInsufficient history
Location
ClimatePartner UK Limited
Trajectory
5y · 2022–NowFinancial sub-scores
Computed from 5 filingsProvides carbon accounting software, emissions analysis, and sustainability consulting to help organisations measure product and corporate carbon footprints, set reduction targets, develop…
Serves B2B customers, from consumer brands and retailers to manufacturers, logistics, insurers and telecoms, targeting sustainability, compliance and leadership teams responsible for net zero and…
Financial Health
StrongStrong · Growing, Hiring · 20% CAGR over 4y
Location
Eco3 Partnership Limited
Trajectory
5y · 2020–NowFinancial sub-scores
Computed from 5 filingsProvides environmental and sustainability consulting focused on net‑zero strategies. Offers carbon and energy data management software, emissions reporting (Scope 1–3), ESG compliance support, and…
Serves businesses and other organisations in the UK and internationally, especially those with asset portfolios, supply chains, buildings, transport, energy, water and waste impacts.
Financial Health
StrongStrong · Growing, Hiring · 15% CAGR over 5y
Location
NET ZERO UK HOLDINGS LIMITED
Trajectory
2y · 2024–NowDevelops carbon reporting software and provides sustainability consulting to help organisations measure and report greenhouse gas emissions, create carbon reduction and net zero strategies, purchase…
Serves businesses and organisations of all sizes, from SMEs to multinational corporations, seeking support with carbon reporting, reduction, offsetting and net zero goals.
Financial Health
Insufficient historyInsufficient history
Location
SUSTAINABLE ESTATES LIMITED
Trajectory
3y · 2023–NowFinancial sub-scores
Computed from 3 filingsProvides sustainability consultancy for property owners and developers, focusing on reducing carbon emissions from built assets. Develops ESG and decarbonisation strategies for estates and buildings,…
Serves public and private sector organisations that own, develop or manage estates and built assets, particularly those with carbon reduction and ESG commitments across property, placemaking,…
Financial Health
DistressedDistressed
Location
CARBON GREEN LTD
Trajectory
5y · 2021–NowFinancial sub-scores
Computed from 5 filingsProvides carbon accounting and sustainability services including greenhouse gas footprint calculation, life‑cycle assessments, emissions databases, offsetting and reduction planning, and CSRD…
Serves businesses and institutions pursuing net-zero or sustainability reporting, including corporate sustainability teams, retailers, manufacturers, insurers, transport companies, schools and higher…
Financial Health
HealthyHealthy
Location
GIVEN AGENCY HOLDINGS LIMITED (FORMERLY KNOWN AS GIVEN LONDON HOLDINGS LIMITED)
Trajectory
5y · 2020–NowFinancial sub-scores
Computed from 5 filingsProvides sustainability and ESG consulting services, including carbon accounting and decarbonisation strategy, environmental management, responsible sourcing, regulatory reporting, sustainable…
Serves businesses and public-sector organisations, including clients in agribusiness, apparel, financial services, food, healthcare and pharmaceuticals, energy, property, retail, technology and…
Financial Health
StrongStrong · Hiring · 19% CAGR over 4y
Location
Trajectory
4y · 2021–NowFinancial sub-scores
Computed from 4 filingsProvides sustainability and climate strategy consulting for businesses, including ESG assessments, environmental inventories, climate risk analysis, science‑based target setting, sustainability and…
Serves businesses and organisational leaders, including sustainability and finance teams, in sectors such as financial services, data, technology and nonprofits facing ESG reporting, climate-risk and…
Financial Health
StrongStrong · Hiring · 88% CAGR over 3y
Location
Ikigai Energy Limited
Trajectory
5y · 2021–NowFinancial sub-scores
Computed from 5 filingsStructures, funds and co-develops behind-the-meter energy infrastructure projects for large energy users and infrastructure assets. Services include energy analysis, optimisation and delivery of…
Serves large energy-intensive businesses and infrastructure operators, including utilities, airports, industrial supply chains and large landowners, plus institutional and strategic investors seeking…
Financial Health
StrongStrong · Growing · 0% CAGR over 4y
Location
Trajectory
5y · 2020–NowFinancial sub-scores
Computed from 5 filingsDevelops, finances and operates on-site energy systems including combined heat and power plants, solar PV, energy storage, microgrids and heat networks. Provides energy centres and grid support…
Serves UK businesses and property developers in real estate, logistics, industrial, food and data centre sectors, especially organisations with high energy demand or grid capacity constraints.
Financial Health
HealthyHealthy · Hiring · 11% CAGR over 5y
Location
AESG LIMITED
Trajectory
5y · 2020–NowFinancial sub-scores
Computed from 5 filingsProvides sustainability, environmental and engineering consultancy for construction and infrastructure projects, including energy audits, carbon and net‑zero strategy, environmental impact…
Serves developers, building owners, contractors and public/private-sector organisations in the built environment, including real estate, infrastructure and construction clients across the Middle…
Financial Health
WeakWeak · -42% CAGR over 5y
Location
Verte Limited
Trajectory
5y · 2021–NowFinancial sub-scores
Computed from 5 filingsProvides sustainability consultancy for real estate and construction projects. Advises developers and property owners on energy strategies, net zero and whole‑life carbon, green building…
Serves B2B and public-sector clients in the built environment, including real estate developers, landlords, fit-out contractors, project managers, investors and local authorities.
Financial Health
StrongStrong · Growing, Hiring · 71% CAGR over 4y
Location
THOMASLLOYD HOLDINGS LTD.
Trajectory
2y · 2019–NowFinancial sub-scores
Computed from 2 filingsDevelops, finances and operates climate infrastructure and energy transition projects. Activities include renewable energy plants such as solar and biomass, sustainable fuels, and climate finance and…
Serves governments, municipalities, utilities, corporates, industrial businesses, farmers, landowners, institutional investors, financial advisers and retail co-investors seeking climate,…
Financial Health
StableStable
Location
GREEN GENERATION SOLUTIONS UK LTD
Trajectory
5y · 2020–NowFinancial sub-scores
Computed from 5 filingsProvides energy audits and sustainability consulting for real estate assets, including strategy development, engineering design, regulatory reporting, and project implementation. Supports energy…
Serves global real estate owners, investors, private equity firms, tenants and public sector organisations across commercial, residential, industrial and data centre property portfolios.
Financial Health
HealthyHealthy · Hiring · 25% CAGR over 5y
Location
CARBON QUOTA LIMITED
Trajectory
5y · 2021–NowFinancial sub-scores
Computed from 5 filingsProvides carbon emissions measurement, reporting and reduction consultancy. Offers software tools that calculate Scope 1, 2 and 3 footprints, generate carbon reports, integrate with MIS and ERP…
Sells to B2B organisations in print, packaging, media and logistics, including major brands, any-size businesses and supply-chain partners with emissions reporting and net-zero requirements.
Financial Health
HealthyHealthy · Hiring · 72% CAGR over 4y
Location
Energy Intelligence Centre Limited
Trajectory
5y · 2020–NowFinancial sub-scores
Computed from 5 filingsProvides energy and utility consultancy services including energy procurement, carbon and sustainability compliance reporting, energy management, bill validation, and market intelligence, as well as…
Serves UK businesses, institutions and public-sector organisations with sites or property portfolios, including banks, schools, universities, housing associations and hospitality/leisure operators.
Financial Health
DistressedDistressed · -17% CAGR over 5y
Location
Simply Sustainable Limited
Trajectory
5y · 2021–NowFinancial sub-scores
Computed from 5 filingsProvides ESG and sustainability consultancy services including strategy development, carbon footprinting, net‑zero target setting, climate risk management, regulatory reporting support (e.g., CSRD,…
Serves corporate ESG and sustainability leaders across built environment, finance, food and beverage, hospitality, manufacturing, pharmaceuticals, professional services, retail, technology, media,…
Financial Health
StableStable · Hiring · 35% CAGR over 4y
Location
Provides climate and environmental consulting services to businesses, including net‑zero strategy development, emissions measurement and reporting, supply chain decarbonisation, and access to carbon…
Sells to businesses, public sector bodies and philanthropic organisations pursuing net zero goals, particularly buyers in aviation, energy and utilities, fashion, financial services, food and…
Location
Amey
Provides engineering, consulting, project management and operations services for infrastructure and complex facilities. Activities include infrastructure design, asset management, maintenance, data…
Serves UK public-sector bodies and infrastructure owners/operators in roads, rail, defence, justice, education, health and aviation, plus organisations managing complex facilities and critical assets.
Location
Trajectory
5y · 2021–NowFinancial sub-scores
Computed from 5 filingsProvides climate finance and sustainability consultancy services, advising governments, investors and organisations on low‑carbon and climate‑resilient development, investment design, risk analysis,…
Serves organisations and investors working on climate finance and low-carbon, climate-resilient development across sectors including agriculture, banking, built environment, energy, forestry, health,…
Financial Health
StrongStrong · Growing, Hiring · 16% CAGR over 4y
Location
Love Design Studio Ltd
Trajectory
5y · 2021–NowFinancial sub-scores
Computed from 5 filingsProvides sustainability consultancy for the built environment, advising designers, developers and public bodies on environmental planning, energy and retrofit, circular economy, air quality and…
Serves B2B and public-sector clients in the built environment, including designers, developers, local councils, fit-out and refurbishment firms, and organisations managing buildings, sustainability,…
Financial Health
StrongStrong · Growing, Hiring · 59% CAGR over 4y
Location
Carbon Eight Associates Limited
Develops carbon capture, utilisation and storage technology that mineralises CO₂ with industrial residues through accelerated carbonation. Produces carbon‑negative lightweight aggregates for…
Serves hard-to-abate industrial businesses, especially cement producers and other sites with CO₂ emissions and industrial residues, plus construction-sector buyers seeking low-carbon aggregates.
Financial Health
Insufficient historyInsufficient history
Location
OSMOSIS ACD LIMITED
Trajectory
4y · 2022–NowFinancial sub-scores
Computed from 4 filingsProvides retrofit consultancy for social housing and local authority housing programmes, including PAS 2035 assessments, energy modelling, improvement option evaluation, retrofit design and…
Serves social landlords, housing associations and local authorities managing domestic housing stock, particularly organisations delivering PAS 2035-compliant retrofit programmes such as LAD and SHDF.
Financial Health
StrongStrong · Hiring · 102% CAGR over 3y
Location
Trajectory
5y · 2021–NowFinancial sub-scores
Computed from 5 filingsDevelops carbon capture, utilisation and storage technologies for industrial emitters. Provides mineralisation and chemical processing systems that capture CO2, convert it into cement substitutes or…
Serves B2B customers in CO2-intensive, hard-to-abate sectors, including maritime, energy, heavy industry, cement plants and shipyards seeking decarbonisation partnerships.
Financial Health
WeakWeak · 0% CAGR over 4y
Location
Respira
Trajectory
3y · 2020–NowFinancial sub-scores
Computed from 3 filingsDevelops and finances environmental projects that generate carbon credits, including forest protection, reforestation, regenerative agriculture, blue carbon and clean cookstove initiatives. Connects…
Serves corporates seeking carbon credits, climate project developers needing finance, and investors pursuing risk-adjusted returns from natural and technological climate solutions.
Financial Health
HealthyHealthy · Hiring · 322% CAGR over 2y
Location
ADW DEVELOPMENTS LIMITED
Trajectory
5y · 2020–NowFinancial sub-scores
Computed from 5 filingsProvides sustainability and construction consultancy focused on life cycle assessment, whole life carbon and life cycle costing for building projects. Produces circular economy statements,…
Serves B2B clients in the built environment, including property developers, construction project teams, architects and asset owners needing sustainability evidence for UK planning and environmental…
Financial Health
StrongStrong · Growing, Hiring · 19% CAGR over 4y
Location
CIRCULAR ECOLOGY LTD
Trajectory
3y · 2023–NowFinancial sub-scores
Computed from 3 filingsProvides environmental sustainability consultancy including carbon footprinting, life cycle assessment (LCA), and embodied and whole‑life carbon analysis. Offers training courses, carbon reduction…
Serves businesses and organisations with carbon and sustainability needs, especially construction and built-environment firms, product manufacturers, suppliers, and teams seeking environmental…
Financial Health
StrongStrong · Growing · 4% CAGR over 2y
Location
Provides energy and environmental commodity trading and advisory services including emissions trading scheme compliance, voluntary carbon credits, renewable energy certificates, biofuels, biogas and…
Sells to businesses navigating decarbonisation and energy markets, especially in aviation, construction, shipping, manufacturing and data centres. Serves organisations across Europe needing carbon…
Location
Carbon Catalyst Limited
Trajectory
5y · 2022–NowFinancial sub-scores
Computed from 5 filingsDevelops carbon capture and storage (CCS) projects for industrial decarbonisation, focusing on carbon transport and offshore storage infrastructure. Works with partners across the CCS value chain to…
Serves large industrial emitters and partners across the carbon capture and storage value chain, including energy, transport and storage stakeholders pursuing large-scale decarbonisation projects.
Financial Health
HealthyHealthy
Location
Carbon Clean Ltd
Trajectory
4y · 2022–NowFinancial sub-scores
Computed from 4 filingsDevelops carbon capture technology for industrial point sources, including modular capture systems and chemical solvents. Designs, builds and operates equipment that captures CO2 emissions from heavy…
Serves B2B industrial companies in hard-to-abate sectors, especially operators of space-constrained heavy industrial sites seeking to meet net zero or emissions reduction targets.
Financial Health
StableStable · 0% CAGR over 3y
Location
Trajectory
5y · 2021–NowFinancial sub-scores
Computed from 5 filingsDevelops life cycle assessment (LCA) software and provides consultancy and data services that help companies collect supplier and supply‑chain data, model environmental impacts, produce ISO‑compliant…
Serves businesses in the raw materials and technology sectors, especially teams managing complex supply chains and needing environmental metrics for regulators, investors, downstream off-takers and…
Financial Health
HealthyHealthy · Hiring · 61% CAGR over 4y
Location
Pause People Collective Limited
Trajectory
4y · 2022–NowFinancial sub-scores
Computed from 4 filingsProvides sustainability consultancy for businesses, including carbon emissions measurement, net-zero target setting, development of decarbonisation roadmaps, and advice on renewable energy generation…
Serves businesses seeking support with net-zero planning, emissions reduction and renewable energy choices, including teams responsible for sustainability, operations or energy procurement.
Financial Health
StrongStrong · Growing, Hiring · 44% CAGR over 3y
Location
KLH SUSTAINABILITY LTD
Trajectory
3y · 2022–NowFinancial sub-scores
Computed from 3 filingsProvides sustainability consultancy for the built environment, including strategy development, energy and performance modelling, planning support, research, sustainable construction certification,…
Serves B2B and public-sector clients in the built environment, including organisations involved in complex buildings, construction materials, housing, places, planning, retrofit and net zero strategy.
Financial Health
StableStable · Hiring · 9% CAGR over 2y
Location
KLERE LIMITED
Trajectory
5y · 2021–NowFinancial sub-scores
Computed from 5 filingsProvides sustainability consulting and data analysis tools for businesses, including carbon and nature impact measurement, reporting, and strategy. Supports development of biochar and carbon capture…
Serves businesses, local authorities and sustainability teams seeking carbon, nature and biochar project support, including councils, estates managers, climate officers, energy managers and…
Financial Health
HealthyHealthy · Hiring · 19% CAGR over 4y
Location
JAW Sustainability Limited
Trajectory
5y · 2021–NowFinancial sub-scores
Computed from 5 filingsProvides sustainability consultancy for construction and fit-out projects, advising from planning to handover. Services include BREEAM certification, whole-life carbon assessments (WLCA), circular…
Serves developers, contractors and project teams delivering construction and fit-out projects, including residential and commercial buildings across the UK, from planning through handover and…
Financial Health
StableStable · Hiring · 32% CAGR over 4y
Location
QuantifiedCarbon Ltd
Trajectory
5y · 2020–NowFinancial sub-scores
Computed from 5 filingsProvides consultancy services for decarbonisation of energy systems and industry, including energy system modelling, scenario analysis, and optimisation studies. Produces research and policy analysis…
Serves public-sector bodies, industry associations, NGOs and energy-sector organisations involved in power-system and industrial decarbonisation, especially European energy-transition programmes.
Financial Health
StrongStrong · Growing · 0% CAGR over 4y
Location
Develops, finances and manages renewable energy and climate infrastructure projects, including solar and biomass power plants, and provides decarbonisation, sustainable fuels and climate finance…
Serves governments, corporates and industrial firms, municipalities, utilities, farmers and landowners, plus institutional investors, advisors and retail co-investors seeking climate and net-zero…
Location
SEABOUND CARBON LTD
Trajectory
3y · 2023–NowFinancial sub-scores
Computed from 3 filingsProvides onboard carbon capture systems for maritime vessels that capture CO2 from ship exhaust and convert it into solid carbonate for offloading and storage or reuse. Designs and installs…
Targets shipowners and fleet operators in commercial shipping that need to reduce fleet greenhouse-gas emissions under regulatory, customer and shareholder pressure.
Financial Health
StrongStrong · Growing, Hiring · 138% CAGR over 2y
Location
Considerate Hoteliers Limited
Trajectory
5y · 2022–NowFinancial sub-scores
Computed from 5 filingsProvides sustainability and ESG consultancy for the hospitality and tourism sectors. Services include energy assessments, carbon reporting, decarbonisation strategies, ESG data management through the…
Serves B2B customers in the hospitality and tourism sectors, especially hotels, hotel groups and tourism businesses worldwide, plus related real estate, finance and investment stakeholders.
Financial Health
StrongStrong · Growing, Hiring · 14% CAGR over 3y
Location
Etude Consulting Limited
Trajectory
5y · 2021–NowFinancial sub-scores
Computed from 5 filingsProvides building performance and sustainability consultancy for construction projects, including low‑energy building design, Passivhaus certification, building simulation, retrofit planning, and…
Serves property developers, housing associations, architects, contractors and local authorities involved in low-energy new-build, retrofit and net-zero housing or building projects.
Financial Health
StrongStrong · Growing, Hiring · 14% CAGR over 4y
Location
Greenheart Business Consulting Limited
Trajectory
5y · 2022–NowFinancial sub-scores
Computed from 5 filingsProvides sustainability and ESG consulting to businesses, including sustainable business strategy development, B Corp certification support, materiality assessments, carbon footprint analysis, net…
Serves B2B clients, particularly forward-thinking brands and companies with sustainability, legal and leadership teams seeking support on ESG, climate, B Corp and responsible business priorities.
Financial Health
StableStable · Hiring · 22% CAGR over 4y
Location
Sustenic Limited
Trajectory
4y · 2022–NowFinancial sub-scores
Computed from 4 filingsProvides research and consultancy on building energy performance and housing stock. Services include data collection and surveys, energy and carbon modelling (SAP, SBEM), housing stock analytics,…
Serves government departments, local authorities, social housing providers, property and health-sector organisations, and private companies responsible for commercial and residential building stock…
Financial Health
StrongStrong · Hiring · 14% CAGR over 3y
Location
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How London climate tech companies work and how to sell to them
What they do
London climate tech firms tend to earn revenue through a mix of recurring software subscriptions, consultancy retainers, project fees and managed-service contracts. Software-led operators usually charge by organisation, site, asset portfolio, emissions scope or user seat, while advisory and delivery firms price around discovery work, baselining, implementation and assurance support. The product shape is often hybrid: a workflow tool or analytics layer wrapped in expert interpretation, documentation and change management. That matters commercially because buyers rarely pay for climate insight alone; they pay for outputs that can be used in reporting, procurement, financing, risk review or operational planning.
Who they sell to
Most sell into mid-market and enterprise customers, public bodies, infrastructure owners, property operators, investors and professional-services groups that need climate work to stand up to scrutiny. Decision-makers are typically CFOs, sustainability directors, heads of property, risk leaders, procurement teams, infrastructure programme owners and, in software-led deals, technology or data teams. Lower-friction products may enter through a departmental subscription or pilot, but higher-value engagements tend to involve direct sales, stakeholder workshops and procurement review. Public-sector and infrastructure contracts often move through formal tenders, while private-sector work is more likely to begin with a reporting deadline, portfolio review or board request.
What they buy
Climate tech firms tend to spend on the operating stack needed to win, deliver and evidence technical work. Common buying categories include CRM, proposal management, project management, billing, professional-services automation, HR systems, analytics, cyber security, cloud infrastructure and data-quality tooling. Software-led firms may also need product analytics, customer success systems, observability, identity management and usage-based billing. Advisory-led and delivery-led firms are more likely to buy recruitment support, specialist insurance, legal advice, accounting, bid-writing help and marketing that reaches finance, property, sustainability and infrastructure audiences. Sellers should expect relatively practical buying criteria: cost control, audit trails, delivery capacity and proof that the tool reduces manual work.
Why and how to sell to them
Climate tech buyers tend to evaluate suppliers when commercial complexity starts to outrun spreadsheets, shared drives and founder-led delivery. Useful triggers include new senior hires, movement from advisory projects into recurring revenue, expansion into public-sector procurement, larger property or infrastructure programmes, fresh funding, or a visible push into regulated reporting and assurance-adjacent work. Outbound messages usually land better when they connect to a specific operational constraint: shortening proposal cycles, reducing evidence-gathering time, improving project margins, managing expert capacity, or giving customers a cleaner audit trail. Generic climate claims are less persuasive than a narrow case for helping them deliver more defensible work with fewer manual hand-offs.
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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