Company lists · Data refreshed September 2026
Top 25 Cleantech startups based in the United Kingdom
RevenueBase identified 764 company matches for cleantech startups associated with the United Kingdom as of September 2026 and tracks 53,844 professional contacts across them, including 22,873 with verified work emails. London is the largest hub.
This list covers company matches for cleantech startups associated with the United Kingdom, found by RevenueBase SmartSearch using the meaning of business descriptions in its company graph at Exact. Ranked by professionals tracked, largest first. Rows show recorded descriptions where available, Exact search membership and the snapshot date. Data refreshed September 19, 2026.
Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase SmartSearch, the natural-language company search RevenueBase customers use to build their own targeted lists and unlock verified emails and direct dials at the companies on them. How these lists are built and judged.
The 25 largest cleantech startups based in the United Kingdom
Ranked by team size| # | Company | Contacts | |||
|---|---|---|---|---|---|
| 1 | 19,907 contacts → | ||||
Exact match “TechnipFMC is a leading technology provider to the traditional and new energies industry, delivering fully integrated projects, products, and services.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase | |||||
| 2 | 12,645 contacts → | ||||
Exact match “Subsea7 makes offshore energy transition possible through the continuous evolution of lower-carbon oil and gas and by enabling the growth of renewables and emerging energy.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase | |||||
| 3 | 3,989 contacts → | ||||
Exact match “We're on a mission to make a big green dent in the universe by building a truly sustainable energy system globally.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase | |||||
| 4 | 1,114 contacts → | ||||
Exact match “Lightsource bp is working to support a future powered by renewable, affordable and reliable energy that benefits our partners, people and planet.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase | |||||
| 5 | 563 contacts → | ||||
Exact match “Sonnedix is a global renewable energy company delivering 100% clean electricity directly to customers through a diversified portfolio of solar, wind, and storage assets.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase | |||||
| 6 | 216 contacts → | ||||
Exact match “Anesco is a market leader in renewable energy and energy efficiency.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase | |||||
| 7 | 213 contacts → | ||||
Exact match “Avantis Group, based in the UK, is a global leader in energy and transportation.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase | |||||
| 8 | 195 contacts → | ||||
Exact match “Low Carbon creates renewable energy to fight climate change.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase | |||||
| 9 | 171 contacts → | ||||
Exact match “CFP Energy is a leading provider of energy and environmental solutions for industrial and commercial clients.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase | |||||
| 10 | 153 contacts → | ||||
Exact match “At Octopus Energy Generation, we’re building green power for the future, from large-scale solar to onshore and offshore wind, and innovative initiatives like the Fan Club.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase | |||||
| 11 | 148 contacts → | ||||
Exact match “Clean energy, powered with purpose.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase | |||||
| 12 | 112 contacts → | ||||
Exact match “As renewable energy technology experts, we have the knowledge and skills to help commercial clients switch to a greener, lower cost and more independent energy source.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase | |||||
| 13 | 79 contacts → | ||||
Exact match “Aiken is now part of nexos.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase | |||||
| 14 | 77 contacts → | ||||
Exact match “Innova is a forward-thinking renewable energy business, employing people across two offices in London and Cheltenham.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase | |||||
| 15 | 76 contacts → | ||||
Exact match “Ashden's mission is to accelerate transformative climate solutions and build a more just world.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase | |||||
| 16 | 69 contacts → | ||||
Exact match “Xlinks is building a global portfolio of large-to-mega scale energy projects that generate and transport clean, affordable electrons.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase | |||||
| 17 | 64 contacts → | ||||
Exact match “Our History Birdsall are an innovative company with a 48-year track record of delivering energy efficiency and environmental solutions to our clients.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase | |||||
| 18 | 63 contacts → | ||||
Exact match “Pacific Green is becoming a world leader at providing sustainable cleantech solutions to help solve climate warming, green energy and resource scarcity challenges.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase | |||||
| 19 | 58 contacts → | ||||
Exact match “Aura Power is a renewable energy investor, developer and adviser.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase | |||||
| 20 | 56 contacts → | ||||
Exact match “Storm4 is a specialized executive search and recruiting firm helping America's energy and infrastructure companies hire the leaders and technical talent they need to grow.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase | |||||
| 21 | 55 contacts → | ||||
Exact match “Renewable Energy Experts: For over 25 years, Ecolution have been at the forefront of renewable energy services, using our award-winning expertise, to help our clients innovate and…” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase | |||||
| 22 | 54 contacts → | ||||
Exact match “Since 2006, we’ve been on a mission to make home energy tech that’s easy to use and understand, reduces energy costs, increases comfort and looks great in people’s homes.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase | |||||
| 23 | 54 contacts → | ||||
Exact match “Driving the market through innovation, EvoEnergy are the UK’s leading energy technology solutions provider, helping blue-chip clients and SME’s turn their sites into ‘sustainable…” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase | |||||
| 24 | 50 contacts → | ||||
Exact match “CATAGEN’s mission is to clean and decarbonise the air.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase | |||||
| 25 | 48 contacts → | ||||
Exact match “ARC Power is at the forefront of renewable energy innovation in Africa, dedicated to transforming lives through energy access in underserved regions.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase | |||||
RevenueBase SmartSearch
Describe a niche business in your own words. RevenueBase SmartSearch compares the meaning of your description with company business descriptions compiled in the RevenueBase company graph. Exact, Similar, Related and Broad control how closely companies must fit.
This list uses Exact for “cleantech startups”. Each Exact match badge shows membership in that saved search; it is not an individual similarity score or a service-quality rating. Recorded descriptions are shown where available.
Showing 25 of 764 cleantech startups based in the United Kingdom
See the full list, filter by size, metro and specialty, and access 22,873 tracked professional contacts with verified work emails. Direct dials are available where recorded.
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Cleantech startups based in the United Kingdom at a glance
As of Sep 19, 2026Companies by employee count
Email recency for this list is measured worldwide rather than for United Kingdom, so it is reported there. Company counts and contact totals on this page are exact for United Kingdom, over 764 companies.
How this list was built
The recorded descriptions help you assess these company matches. Check a company’s website for its current services and locations.
- Source
- The RevenueBase company graph: 60 million companies and 398.9 million professional contacts resolved from primary sources, queried with RevenueBase SmartSearch, the natural-language company search available to every RevenueBase user.
- What qualifies
- Company records associated with the United Kingdom whose business descriptions match “cleantech startups” by meaning at the Exact setting. Descriptions are compiled in the RevenueBase company graph from public websites, profiles and company information where available; they are not guaranteed quotations from the company's website.
- RevenueBase SmartSearch
- Describe a niche company in your own words to find businesses by meaning. Exact, Similar, Related and Broad control the breadth of RevenueBase SmartSearch. This saved list uses Exact. Each row's Exact match badge shows inclusion in that search, not an individual score or a service-quality judgment.
- Public preview
- The public preview omits records without a verified work email. Where headquarters information is recorded, preview rows are also filtered to this page’s location. Dataset totals and geographic summaries describe the full matched records before these preview filters.
- Match quality
- RevenueBase's August 25, 2026 study assessed 4,198 description/company pairs across matching settings. The publisher reports 86% good or better at Exact. This evaluates the method across queries; it does not audit this individual list. Recorded company descriptions, where available, help you judge each match yourself. Read the full methodology: how the lists are built and what the study measures.
- Ranking
- Team size, largest first: companies are ordered by the number of professionals RevenueBase tracks at each one. Employee ranges shown are reported bands, for context.
- Verification
- Every displayed company carries at least one verified work email. RevenueBase tracks 22,873 professional contacts with verified work emails across the full matched dataset. Contacts re-verify on a rolling cadence, and each contact's own verification date is shown inside RevenueBase.
- Refresh
- This page's figures were pulled from the company graph on September 19, 2026. Lists refresh periodically as the graph is re-checked.
- Record context
- Company records and descriptions can change. Check the company's website for its current services and locations.
Frequently asked
What is RevenueBase SmartSearch?
RevenueBase SmartSearch finds niche companies by the meaning of their business descriptions in the RevenueBase company graph. Exact, Similar, Related and Broad control how closely companies must fit your description. This list uses Exact for “cleantech startups”; each Exact match badge shows search membership, not an individual similarity or quality score.
How many cleantech startups are there based in the United Kingdom?
RevenueBase identified 764 company matches for cleantech startups associated with the United Kingdom as of September 2026, using the meaning of business descriptions at Exact. This is the recorded matched set in the RevenueBase company graph.
What is the largest company on this list?
Technipfmc tops the displayed preview by professional contacts tracked in RevenueBase. Recorded headquarters appear in the company rows.
Which city has the most cleantech startups?
London leads with 242 company records, followed by Edinburgh (15) and Manchester (13).
How do I get contact information for these companies?
A free RevenueBase account lets you run this exact search and work limited free results with 500 credits to start. Upgrading provides access to the 22,873 professional contacts with verified work emails tracked across these 764 companies; direct dials are available where recorded.
How current is this list?
The list refreshes periodically as the company graph is re-checked. This page's figures were pulled on September 19, 2026.
Ready to reach these companies? Verified emails and direct dials for all 764 cleantech startups based in the United Kingdom. Start with a free account, no credit card.
Download this list →Related lists
Cleantech startups by geography
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- Cleantech startups based in Porto Alegre, Brazil
- Cleantech startups based in Rio De Janeiro, Brazil
- Cleantech startups based in Sao Paulo, Brazil
- Cleantech startups based in Calgary, Canada
- Cleantech startups based in Toronto, Canada
- Cleantech startups based in Vancouver, Canada
- Cleantech startups based in Ahmedabad, India
- Cleantech startups based in Bangalore, India
- Cleantech startups based in Chennai, India
Browse the directory
About this data
RevenueBase is a B2B data infrastructure company. Its company graph covers 60 million companies and 398.9 million professional contacts, with emails verified on a rolling cadence rather than scraped once and left to decay. These company lists are generated directly from that graph with RevenueBase SmartSearch, the same natural-language company search every RevenueBase user has: describe a market in plain words, get the companies that match, and add verified emails and direct dials for the people at them. It is the same data that powers RevenueBase's B2B data products, and a free account includes 500 credits to start. How these lists are built and judged.
More company lists
- All company lists
- Lists by location
- Lists A-Z
- New lists
- Cleantech startups based in Belo Horizonte, Brazil
- Cleantech startups based in Curitiba, Brazil
- Cleantech startups based in Fortaleza, Brazil
- Cleantech startups based in Porto Alegre, Brazil
- Cleantech startups based in Rio De Janeiro, Brazil
- Cleantech startups based in Sao Paulo, Brazil
Company intelligence · public preview
Top 25 cleantech startups based in the United Kingdom
Find companies in any niche.
Describe the businesses you want in your own words. RevenueBase SmartSearch matches company descriptions by meaning.
RevenueBase records 764 matching company records for cleantech startups based in the United Kingdom, with 53,844 tracked contacts and 22,873 verified work emails.
This public preview shows 25 selected records ordered by tracked contacts. RevenueBase SmartSearch finds company descriptions that match by meaning at Exact. Snapshot: September 19, 2026.
RevenueBase compiles business descriptions for niche-company discovery; each row shows a recorded excerpt where available. Adapt this search to find the companies and contacts you want.
Top 25 cleantech startups based in the United Kingdom
The public list shows selected company records with contact and verified-email coverage. Reported employee bands provide separate company-size context.
| # | Company | Headquarters on record | Reported employees | RevenueBase SmartSearch | Tracked contacts |
|---|---|---|---|---|---|
| 1 |  Technipfmctechnipfmc.comHQ: Newcastle Upon Tyne, United KingdomReported employees: 10001+ | Newcastle Upon Tyne, United Kingdom | 10001+ | Exact match | 19,907 contacts → |
“TechnipFMC is a leading technology provider to the traditional and new energies industry, delivering fully integrated projects, products, and services.” Recorded description excerpt · September 19, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 2 |  Subsea7subsea7.comHQ: London, United KingdomReported employees: 10001+ | London, United Kingdom | 10001+ | Exact match | 12,645 contacts → |
“Subsea7 makes offshore energy transition possible through the continuous evolution of lower-carbon oil and gas and by enabling the growth of renewables and emerging energy.” Recorded description excerpt · September 19, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 3 |  Octopus Energyoctopus.energyHQ: London, United KingdomReported employees: 1,001-5,000 | London, United Kingdom | 1,001-5,000 | Exact match | 3,989 contacts → |
“We're on a mission to make a big green dent in the universe by building a truly sustainable energy system globally.” Recorded description excerpt · September 19, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 4 |  Lightsource BPlightsourcebp.comHQ: London, United KingdomReported employees: 1,001-5,000 | London, United Kingdom | 1,001-5,000 | Exact match | 1,114 contacts → |
“Lightsource bp is working to support a future powered by renewable, affordable and reliable energy that benefits our partners, people and planet.” Recorded description excerpt · September 19, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 5 |  Sonnedixsonnedix.comHQ: London, United KingdomReported employees: 501-1,000 | London, United Kingdom | 501-1,000 | Exact match | 563 contacts → |
“Sonnedix is a global renewable energy company delivering 100% clean electricity directly to customers through a diversified portfolio of solar, wind, and storage assets.” Recorded description excerpt · September 19, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 6 |  Anesco LTDanesco.comHQ: Aldermaston Nr Reading, United KingdomReported employees: 201-500 | Aldermaston Nr Reading, United Kingdom | 201-500 | Exact match | 216 contacts → |
“Anesco is a market leader in renewable energy and energy efficiency.” Recorded description excerpt · September 19, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 7 |  Avantisavantisgroup.comHQ: Cardiff, United KingdomReported employees: 501-1,000 | Cardiff, United Kingdom | 501-1,000 | Exact match | 213 contacts → |
“Avantis Group, based in the UK, is a global leader in energy and transportation.” Recorded description excerpt · September 19, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 8 |  LOW Carbonlowcarbon.comHQ: London, United KingdomReported employees: 51-200 | London, United Kingdom | 51-200 | Exact match | 195 contacts → |
“Low Carbon creates renewable energy to fight climate change.” Recorded description excerpt · September 19, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 9 |  CFP Energycfp.energyHQ: London, United KingdomReported employees: 201-500 | London, United Kingdom | 201-500 | Exact match | 171 contacts → |
“CFP Energy is a leading provider of energy and environmental solutions for industrial and commercial clients.” Recorded description excerpt · September 19, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 10 |  Octopus Energy Generationoctopusenergygeneration.comHQ: London, United KingdomReported employees: 201-500 | London, United Kingdom | 201-500 | Exact match | 153 contacts → |
“At Octopus Energy Generation, we’re building green power for the future, from large-scale solar to onshore and offshore wind, and innovative initiatives like the Fan Club.” Recorded description excerpt · September 19, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 11 |  British Solar Renewablesbritishrenewables.comHQ: Shepton Mallet, United KingdomReported employees: 51-200 | Shepton Mallet, United Kingdom | 51-200 | Exact match | 148 contacts → |
“Clean energy, powered with purpose.” Recorded description excerpt · September 19, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 12 |  AESaes-smart.xyzHQ: Enfield, United KingdomReported employees: 201-500 | Enfield, United Kingdom | 201-500 | Exact match | 112 contacts → |
“As renewable energy technology experts, we have the knowledge and skills to help commercial clients switch to a greener, lower cost and more independent energy source.” Recorded description excerpt · September 19, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 13 |  AIKENnexos.solutionsHQ: Aberdeen, United KingdomReported employees: 201-500 | Aberdeen, United Kingdom | 201-500 | Exact match | 79 contacts → |
“Aiken is now part of nexos.” Recorded description excerpt · September 19, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 14 |  Innovainnova.co.ukHQ: London, United KingdomReported employees: 51-200 | London, United Kingdom | 51-200 | Exact match | 77 contacts → |
“Innova is a forward-thinking renewable energy business, employing people across two offices in London and Cheltenham.” Recorded description excerpt · September 19, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 15 |  Ashdenashden.orgHQ: London, United KingdomReported employees: 11-50 | London, United Kingdom | 11-50 | Exact match | 76 contacts → |
“Ashden's mission is to accelerate transformative climate solutions and build a more just world.” Recorded description excerpt · September 19, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 16 |  Xlinksxlinks.coHQ: London, United KingdomReported employees: 51-200 | London, United Kingdom | 51-200 | Exact match | 69 contacts → |
“Xlinks is building a global portfolio of large-to-mega scale energy projects that generate and transport clean, affordable electrons.” Recorded description excerpt · September 19, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 17 |  Birdsall Group LTDbirdsall.co.ukHQ: Hemel Hempstead, United KingdomReported employees: 51-200 | Hemel Hempstead, United Kingdom | 51-200 | Exact match | 64 contacts → |
“Our History Birdsall are an innovative company with a 48-year track record of delivering energy efficiency and environmental solutions to our clients.” Recorded description excerpt · September 19, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 18 |  Pacific Greenpacificgreen.comHQ: London, United KingdomReported employees: 51-200 | London, United Kingdom | 51-200 | Exact match | 63 contacts → |
“Pacific Green is becoming a world leader at providing sustainable cleantech solutions to help solve climate warming, green energy and resource scarcity challenges.” Recorded description excerpt · September 19, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 19 |  Aura Poweraurapower.comHQ: Bristol, United KingdomReported employees: 11-50 | Bristol, United Kingdom | 11-50 | Exact match | 58 contacts → |
“Aura Power is a renewable energy investor, developer and adviser.” Recorded description excerpt · September 19, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 20 | Storm4storm4.com HQ: London, United KingdomReported employees: 51-200 | London, United Kingdom | 51-200 | Exact match | 56 contacts → |
“Storm4 is a specialized executive search and recruiting firm helping America's energy and infrastructure companies hire the leaders and technical talent they need to grow.” Recorded description excerpt · September 19, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 21 |  Ecolution Groupecolutiongroup.comHQ: Trottiscliffe, United KingdomReported employees: 51-200 | Trottiscliffe, United Kingdom | 51-200 | Exact match | 55 contacts → |
“Renewable Energy Experts: For over 25 years, Ecolution have been at the forefront of renewable energy services, using our award-winning expertise, to help our clients innovate and…” Recorded description excerpt · September 19, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 22 | GEO Green Energy Optionsgeotogether.com HQ: Hardwick, United KingdomReported employees: 51-200 | Hardwick, United Kingdom | 51-200 | Exact match | 54 contacts → |
“Since 2006, we’ve been on a mission to make home energy tech that’s easy to use and understand, reduces energy costs, increases comfort and looks great in people’s homes.” Recorded description excerpt · September 19, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 23 |  Evoenergyevoenergy.co.ukHQ: Nottingham, United KingdomReported employees: 11-50 | Nottingham, United Kingdom | 11-50 | Exact match | 54 contacts → |
“Driving the market through innovation, EvoEnergy are the UK’s leading energy technology solutions provider, helping blue-chip clients and SME’s turn their sites into ‘sustainable…” Recorded description excerpt · September 19, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 24 | Catagen Limitedcatagen.com HQ: Belfast, United KingdomReported employees: 51-200 | Belfast, United Kingdom | 51-200 | Exact match | 50 contacts → |
“CATAGEN’s mission is to clean and decarbonise the air.” Recorded description excerpt · September 19, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 25 |  ARC Powerarcpower.coHQ: London, United KingdomReported employees: 51-200 | London, United Kingdom | 51-200 | Exact match | 48 contacts → |
“ARC Power is at the forefront of renewable energy innovation in Africa, dedicated to transforming lives through energy access in underserved regions.” Recorded description excerpt · September 19, 2026Open company data in RevenueBase ↗Free signup required. | |||||
Showing 25 of 764 company matches
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Cleantech startups: dataset insights
September 19, 2026These summaries describe recorded coverage in this saved dataset. This page is derived from saved source records; per-contact mobile coverage and email-recency results are not established by this snapshot.
Reported company sizes
760 records in the displayed employee bands.
4 matching records are outside the displayed bands or do not have a displayed size. Bars show shares of the displayed bands.
Email recency for this list is measured worldwide rather than for United Kingdom, so it is reported there. Company counts and contact totals on this page are exact for United Kingdom, over 764 companies.
How this company list was built
Describe a niche in your own words: companies installing commercial solar, or manufacturers of sustainable packaging. RevenueBase SmartSearch finds companies whose compiled business descriptions match by meaning. This list is one saved example to adapt.
Where the company descriptions come from
RevenueBase compiles company information from public sources, including company websites and public professional profiles such as LinkedIn, alongside information supplied by companies. The short recorded excerpt shown here is separate from the complete business description used for matching; individual source URLs and collection dates are not provided in this public snapshot.
RevenueBase SmartSearch matching settings
- Exact
- Closest fits to the business described.
- Similar
- Similar businesses with a wider range of fits.
- Related
- Related businesses in and around the category.
- Broad
- A broader set of businesses connected to the description.
RevenueBase SmartSearch · Exact match identifies inclusion in this search's closest semantic matching setting. It is not a per-company confidence score, a literal keyword match, or a quality endorsement.
Selection, ordering and scope
The public list shows selected company records with contact and verified-email coverage. Reported employee bands provide separate company-size context.
This page is derived from saved source records; per-contact mobile coverage and email-recency results are not established by this snapshot.
Recorded company descriptions support research; check company websites for current services. The selected preview is ordered by tracked contacts and is not a list of the best service providers.
Snapshot: September 19, 2026.
RevenueBase is a B2B data infrastructure company. Its September 3, 2026 published methodology describes a graph of 60 million companies and 398.9 million professional contacts; these platform figures differ from this page's totals. Published methodology ↗
Questions about this company list
What does Exact match mean for cleantech startups?
The separate RevenueBase SmartSearch column identifies inclusion at the closest semantic matching preset. It is not a literal keyword match, a per-company confidence score or a quality endorsement. Changing the search form opens a new search in RevenueBase; it does not reclassify these saved rows.
How many cleantech startups did RevenueBase find based in the United Kingdom?
The saved snapshot records 764 matching company records, 53,844 tracked contacts and 22,873 verified emails. The public preview displays 25 selected records.
Where do the company descriptions come from?
RevenueBase compiles company information from public sources, including company websites and public professional profiles such as LinkedIn, alongside information supplied by companies. The short recorded excerpt shown here is separate from the complete business description used for matching; individual source URLs and collection dates are not provided in this public snapshot.
How are the public companies ordered?
The selected public records are ordered by contacts tracked in RevenueBase, highest first. Contact coverage is a prospecting measure, not an assessment of the company's services or quality.
How can I get contact information?
Select a company's contact count to open its filtered contacts in RevenueBase. Free signup is required and includes 500 credits and limited free results. Verified emails, direct dials and mobile numbers depend on available coverage.
How current is this list?
Snapshot: September 19, 2026. Review each company's website for current services and locations. A recorded business description does not establish that every company offers every service named in the search.
What do headquarters and employee bands mean?
These are recorded company-level fields, rather than a map of every branch or a count of specialists. Missing headquarters or employee bands are labeled; older records may show a location separately from recorded headquarters.
Build your next target company list
Adapt this niche search and work with available contacts in RevenueBase.
Related lists
Cleantech startups by geography
- Cleantech startups based in Belo Horizonte, Brazil
- Cleantech startups based in Curitiba, Brazil
- Cleantech startups based in Fortaleza, Brazil
- Cleantech startups based in Porto Alegre, Brazil
- Cleantech startups based in Rio De Janeiro, Brazil
- Cleantech startups based in Sao Paulo, Brazil
- Cleantech startups based in Calgary, Canada
- Cleantech startups based in Toronto, Canada
- Cleantech startups based in Vancouver, Canada
- Cleantech startups based in Ahmedabad, India
- Cleantech startups based in Bangalore, India
- Cleantech startups based in Chennai, India
Browse the directory
Cite this list
RevenueBase Data Team. Top 25 cleantech startups based in the United Kingdom. Snapshot: September 19, 2026. https://revenuebase.ai/companies/cleantech-startups/united-kingdom.
This is a selected public preview of saved company records, rather than an independently verified census. Open the source page ↗
More company lists
- All company lists
- Lists by location
- Lists A-Z
- New lists
- Cleantech startups based in Belo Horizonte, Brazil
- Cleantech startups based in Curitiba, Brazil
- Cleantech startups based in Fortaleza, Brazil
- Cleantech startups based in Porto Alegre, Brazil
- Cleantech startups based in Rio De Janeiro, Brazil
- Cleantech startups based in Sao Paulo, Brazil
Company intelligence · public preview
Top 25 cleantech startups based in the United Kingdom
RevenueBase records 764 matching company records for cleantech startups based in the United Kingdom, with 53,844 tracked contacts and 22,873 verified work emails.
This public preview shows 25 selected records ordered by tracked contacts. RevenueBase SmartSearch finds company descriptions that match by meaning at Exact. Snapshot: September 19, 2026.
RevenueBase compiles business descriptions for niche-company discovery; each row shows a recorded excerpt where available. Adapt this search to find the companies and contacts you want.
Top 25 cleantech startups based in the United Kingdom
The public list shows selected company records with contact and verified-email coverage. Reported employee bands provide separate company-size context.
| # | Company | Headquarters on record | Reported employees | RevenueBase SmartSearch | Tracked contacts |
|---|---|---|---|---|---|
| 1 | Technipfmctechnipfmc.com HQ: Newcastle Upon Tyne, United KingdomReported employees: 10001+ | Newcastle Upon Tyne, United Kingdom | 10001+ | Exact match | 19,907 contacts → |
“TechnipFMC is a leading technology provider to the traditional and new energies industry, delivering fully integrated projects, products, and services.” Recorded description excerpt · September 19, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 2 | Subsea7subsea7.com HQ: London, United KingdomReported employees: 10001+ | London, United Kingdom | 10001+ | Exact match | 12,645 contacts → |
“Subsea7 makes offshore energy transition possible through the continuous evolution of lower-carbon oil and gas and by enabling the growth of renewables and emerging energy.” Recorded description excerpt · September 19, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 3 | Octopus Energyoctopus.energy HQ: London, United KingdomReported employees: 1,001-5,000 | London, United Kingdom | 1,001-5,000 | Exact match | 3,989 contacts → |
“We're on a mission to make a big green dent in the universe by building a truly sustainable energy system globally.” Recorded description excerpt · September 19, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 4 | Lightsource BPlightsourcebp.com HQ: London, United KingdomReported employees: 1,001-5,000 | London, United Kingdom | 1,001-5,000 | Exact match | 1,114 contacts → |
“Lightsource bp is working to support a future powered by renewable, affordable and reliable energy that benefits our partners, people and planet.” Recorded description excerpt · September 19, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 5 | Sonnedixsonnedix.com HQ: London, United KingdomReported employees: 501-1,000 | London, United Kingdom | 501-1,000 | Exact match | 563 contacts → |
“Sonnedix is a global renewable energy company delivering 100% clean electricity directly to customers through a diversified portfolio of solar, wind, and storage assets.” Recorded description excerpt · September 19, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 6 | Anesco LTDanesco.com HQ: Aldermaston Nr Reading, United KingdomReported employees: 201-500 | Aldermaston Nr Reading, United Kingdom | 201-500 | Exact match | 216 contacts → |
“Anesco is a market leader in renewable energy and energy efficiency.” Recorded description excerpt · September 19, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 7 | Avantisavantisgroup.com HQ: Cardiff, United KingdomReported employees: 501-1,000 | Cardiff, United Kingdom | 501-1,000 | Exact match | 213 contacts → |
“Avantis Group, based in the UK, is a global leader in energy and transportation.” Recorded description excerpt · September 19, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 8 | LOW Carbonlowcarbon.com HQ: London, United KingdomReported employees: 51-200 | London, United Kingdom | 51-200 | Exact match | 195 contacts → |
“Low Carbon creates renewable energy to fight climate change.” Recorded description excerpt · September 19, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 9 | CFP Energycfp.energy HQ: London, United KingdomReported employees: 201-500 | London, United Kingdom | 201-500 | Exact match | 171 contacts → |
“CFP Energy is a leading provider of energy and environmental solutions for industrial and commercial clients.” Recorded description excerpt · September 19, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 10 | Octopus Energy Generationoctopusenergygeneration.com HQ: London, United KingdomReported employees: 201-500 | London, United Kingdom | 201-500 | Exact match | 153 contacts → |
“At Octopus Energy Generation, we’re building green power for the future, from large-scale solar to onshore and offshore wind, and innovative initiatives like the Fan Club.” Recorded description excerpt · September 19, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 11 | British Solar Renewablesbritishrenewables.com HQ: Shepton Mallet, United KingdomReported employees: 51-200 | Shepton Mallet, United Kingdom | 51-200 | Exact match | 148 contacts → |
“Clean energy, powered with purpose.” Recorded description excerpt · September 19, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 12 | AESaes-smart.xyz HQ: Enfield, United KingdomReported employees: 201-500 | Enfield, United Kingdom | 201-500 | Exact match | 112 contacts → |
“As renewable energy technology experts, we have the knowledge and skills to help commercial clients switch to a greener, lower cost and more independent energy source.” Recorded description excerpt · September 19, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 13 | AIKENnexos.solutions HQ: Aberdeen, United KingdomReported employees: 201-500 | Aberdeen, United Kingdom | 201-500 | Exact match | 79 contacts → |
“Aiken is now part of nexos.” Recorded description excerpt · September 19, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 14 | Innovainnova.co.uk HQ: London, United KingdomReported employees: 51-200 | London, United Kingdom | 51-200 | Exact match | 77 contacts → |
“Innova is a forward-thinking renewable energy business, employing people across two offices in London and Cheltenham.” Recorded description excerpt · September 19, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 15 | Ashdenashden.org HQ: London, United KingdomReported employees: 11-50 | London, United Kingdom | 11-50 | Exact match | 76 contacts → |
“Ashden's mission is to accelerate transformative climate solutions and build a more just world.” Recorded description excerpt · September 19, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 16 | Xlinksxlinks.co HQ: London, United KingdomReported employees: 51-200 | London, United Kingdom | 51-200 | Exact match | 69 contacts → |
“Xlinks is building a global portfolio of large-to-mega scale energy projects that generate and transport clean, affordable electrons.” Recorded description excerpt · September 19, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 17 | Birdsall Group LTDbirdsall.co.uk HQ: Hemel Hempstead, United KingdomReported employees: 51-200 | Hemel Hempstead, United Kingdom | 51-200 | Exact match | 64 contacts → |
“Our History Birdsall are an innovative company with a 48-year track record of delivering energy efficiency and environmental solutions to our clients.” Recorded description excerpt · September 19, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 18 | Pacific Greenpacificgreen.com HQ: London, United KingdomReported employees: 51-200 | London, United Kingdom | 51-200 | Exact match | 63 contacts → |
“Pacific Green is becoming a world leader at providing sustainable cleantech solutions to help solve climate warming, green energy and resource scarcity challenges.” Recorded description excerpt · September 19, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 19 | Aura Poweraurapower.com HQ: Bristol, United KingdomReported employees: 11-50 | Bristol, United Kingdom | 11-50 | Exact match | 58 contacts → |
“Aura Power is a renewable energy investor, developer and adviser.” Recorded description excerpt · September 19, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 20 | Storm4storm4.com HQ: London, United KingdomReported employees: 51-200 | London, United Kingdom | 51-200 | Exact match | 56 contacts → |
“Storm4 is a specialized executive search and recruiting firm helping America's energy and infrastructure companies hire the leaders and technical talent they need to grow.” Recorded description excerpt · September 19, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 21 | Ecolution Groupecolutiongroup.com HQ: Trottiscliffe, United KingdomReported employees: 51-200 | Trottiscliffe, United Kingdom | 51-200 | Exact match | 55 contacts → |
“Renewable Energy Experts: For over 25 years, Ecolution have been at the forefront of renewable energy services, using our award-winning expertise, to help our clients innovate and…” Recorded description excerpt · September 19, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 22 | GEO Green Energy Optionsgeotogether.com HQ: Hardwick, United KingdomReported employees: 51-200 | Hardwick, United Kingdom | 51-200 | Exact match | 54 contacts → |
“Since 2006, we’ve been on a mission to make home energy tech that’s easy to use and understand, reduces energy costs, increases comfort and looks great in people’s homes.” Recorded description excerpt · September 19, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 23 | Evoenergyevoenergy.co.uk HQ: Nottingham, United KingdomReported employees: 11-50 | Nottingham, United Kingdom | 11-50 | Exact match | 54 contacts → |
“Driving the market through innovation, EvoEnergy are the UK’s leading energy technology solutions provider, helping blue-chip clients and SME’s turn their sites into ‘sustainable…” Recorded description excerpt · September 19, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 24 | Catagen Limitedcatagen.com HQ: Belfast, United KingdomReported employees: 51-200 | Belfast, United Kingdom | 51-200 | Exact match | 50 contacts → |
“CATAGEN’s mission is to clean and decarbonise the air.” Recorded description excerpt · September 19, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 25 | ARC Powerarcpower.co HQ: London, United KingdomReported employees: 51-200 | London, United Kingdom | 51-200 | Exact match | 48 contacts → |
“ARC Power is at the forefront of renewable energy innovation in Africa, dedicated to transforming lives through energy access in underserved regions.” Recorded description excerpt · September 19, 2026Open company data in RevenueBase ↗Free signup required. | |||||
Showing 25 of 764 company matches
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Cleantech startups: dataset insights
September 19, 2026These summaries describe recorded coverage in this saved dataset. This page is derived from saved source records; per-contact mobile coverage and email-recency results are not established by this snapshot.
Reported company sizes
760 records in the displayed employee bands.
4 matching records are outside the displayed bands or do not have a displayed size. Bars show shares of the displayed bands.
Email recency for this list is measured worldwide rather than for United Kingdom, so it is reported there. Company counts and contact totals on this page are exact for United Kingdom, over 764 companies.
How this company list was built
Describe a niche in your own words: companies installing commercial solar, or manufacturers of sustainable packaging. RevenueBase SmartSearch finds companies whose compiled business descriptions match by meaning. This list is one saved example to adapt.
Where the company descriptions come from
RevenueBase compiles company information from public sources, including company websites and public professional profiles such as LinkedIn, alongside information supplied by companies. The short recorded excerpt shown here is separate from the complete business description used for matching; individual source URLs and collection dates are not provided in this public snapshot.
RevenueBase SmartSearch matching settings
- Exact
- Closest fits to the business described.
- Similar
- Similar businesses with a wider range of fits.
- Related
- Related businesses in and around the category.
- Broad
- A broader set of businesses connected to the description.
RevenueBase SmartSearch · Exact match identifies inclusion in this search's closest semantic matching setting. It is not a per-company confidence score, a literal keyword match, or a quality endorsement.
Selection, ordering and scope
The public list shows selected company records with contact and verified-email coverage. Reported employee bands provide separate company-size context.
This page is derived from saved source records; per-contact mobile coverage and email-recency results are not established by this snapshot.
Recorded company descriptions support research; check company websites for current services. The selected preview is ordered by tracked contacts and is not a list of the best service providers.
Snapshot: September 19, 2026.
RevenueBase is a B2B data infrastructure company. Its September 3, 2026 published methodology describes a graph of 60 million companies and 398.9 million professional contacts; these platform figures differ from this page's totals. Published methodology ↗
Questions about this company list
What does Exact match mean for cleantech startups?
The separate RevenueBase SmartSearch column identifies inclusion at the closest semantic matching preset. It is not a literal keyword match, a per-company confidence score or a quality endorsement. Changing the search form opens a new search in RevenueBase; it does not reclassify these saved rows.
How many cleantech startups did RevenueBase find based in the United Kingdom?
The saved snapshot records 764 matching company records, 53,844 tracked contacts and 22,873 verified emails. The public preview displays 25 selected records.
Where do the company descriptions come from?
RevenueBase compiles company information from public sources, including company websites and public professional profiles such as LinkedIn, alongside information supplied by companies. The short recorded excerpt shown here is separate from the complete business description used for matching; individual source URLs and collection dates are not provided in this public snapshot.
How are the public companies ordered?
The selected public records are ordered by contacts tracked in RevenueBase, highest first. Contact coverage is a prospecting measure, not an assessment of the company's services or quality.
How can I get contact information?
Select a company's contact count to open its filtered contacts in RevenueBase. Free signup is required and includes 500 credits and limited free results. Verified emails, direct dials and mobile numbers depend on available coverage.
How current is this list?
Snapshot: September 19, 2026. Review each company's website for current services and locations. A recorded business description does not establish that every company offers every service named in the search.
What do headquarters and employee bands mean?
These are recorded company-level fields, rather than a map of every branch or a count of specialists. Missing headquarters or employee bands are labeled; older records may show a location separately from recorded headquarters.
Build your next target company list
Adapt this niche search and work with available contacts in RevenueBase.
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Cite this list
RevenueBase Data Team. Top 25 cleantech startups based in the United Kingdom. Snapshot: September 19, 2026. https://revenuebase.ai/companies/cleantech-startups/united-kingdom.
This is a selected public preview of saved company records, rather than an independently verified census. Open the source page ↗
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