Company lists · Data refreshed September 2026
Top 25 Venture capital cleantech firms based in London, United Kingdom
RevenueBase identified 81 company matches for venture capital cleantech firms associated with London, United Kingdom as of September 2026 and tracks 765 professional contacts across them, including 409 with verified work emails. Across the United Kingdom, London is the largest hub for this category.
This list covers company matches for venture capital cleantech firms associated with London, 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 29, 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 venture capital cleantech firms based in London, United Kingdom
Ranked by team size| # | Company | Contacts | |||
|---|---|---|---|---|---|
| 1 | 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 29, 2026 · View company records in RevenueBase | |||||
| 2 | 62 contacts → | ||||
Exact match “Climate Investment is a US and UK-based independently managed specialist investor focused on accelerating capital-efficient decarbonization of heavy emitting sectors.” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase | |||||
| 3 | 43 contacts → | ||||
Exact match “The reference early stage investor for UK climate innovation.” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase | |||||
| 4 | 41 contacts → | ||||
Exact match “Founded in 2018 by ambitious entrepreneurs, National Energy is a US-backed, privately funded group active globally across the renewable energy sector.” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase | |||||
| 5 | 31 contacts → | ||||
Exact match “AP Ventures is an independent venture capital firm headquartered in London, with offices in San Francisco and South Africa.” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase | |||||
| 6 | 29 contacts → | ||||
Exact match “Founded in 2005, ETF Partners (The Environmental Technologies Fund) stands as Europe's original venture capital firm dedicated to sustainability and impact investing.” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase | |||||
| 7 | 29 contacts → | ||||
Exact match “With European roots and decades of experience, we invest globally in exceptional startups and talented teams.” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase | |||||
| 8 | 24 contacts → | ||||
Exact match “At CLT, we believe clean technology is essential to building a resilient, competitive, and sustainable economy.” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase | |||||
| 9 | 24 contacts → | ||||
Exact match “C5 Capital is a specialist Venture Capital Firm focused on cybersecurity, space and energy security.” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase | |||||
| 10 | 19 contacts → | ||||
Exact match “Taranis is an investment and asset management company owned by the Perenco Group.” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase | |||||
| 11 | 14 contacts → | ||||
Exact match “Clean Energy Transition LLP is an investment management partnership focused on fundamental equity investing.” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase | |||||
| 12 | 13 contacts → | ||||
Exact match “CGF invest in tech innovations that reduce greenhouse gas emissions or improve resource efficiency across power, transport, industry, buildings, waste and water.” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase | |||||
| 13 | 11 contacts → | ||||
Exact match “Buckthorn invests in industrial businesses providing products and services that support the growth and integration of renewable energy, lower emissions, energy efficiency and…” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase | |||||
| 14 | 11 contacts → | ||||
Exact match “We invest in new energy technologies.” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase | |||||
| 15 | 11 contacts → | ||||
Exact match “Telis Energy is a UK-based green energy projects developer and investor.” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase | |||||
| 16 | 9 contacts → | ||||
Exact match “Magnesium Capital is a growth-oriented private equity firm based in London that focuses on investing in fast-growing technology and tech-led businesses that are transforming the…” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase | |||||
| 17 | 9 contacts → | ||||
Exact match “Early-stage venture capital investor focused on technologies driving the Energy transition.” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase | |||||
| 18 | 9 contacts → | ||||
Exact match “Investments and consulting services” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase | |||||
| 19 | 8 contacts → | ||||
Exact match “Blume Equity is a climate-tech growth equity firm with offices in London and Amsterdam focusing on companies driving sustainable outcomes for planet and people.” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase | |||||
| 20 | 8 contacts → | ||||
Exact match “Impact-driven venture and growth capital fund centred on Energy Decarbonization, Hydrogen, Water risks/Food Security and AI driven solutions.” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase | |||||
| 21 | 7 contacts → | ||||
Exact match “Susgen is a London-based private investment firm focused on fighting climate change.” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase | |||||
| 22 | 7 contacts → | ||||
Exact match “EcoPragma is dedicated to the net zero transition.” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase | |||||
| 23 | 7 contacts → | ||||
Exact match “Ekta raises capital for companies addressing environmental and social challenges through technology and innovation.” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase | |||||
| 24 | 6 contacts → | ||||
Exact match “Investing in technology companies that enable a more sustainable built environment.” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase | |||||
| 25 | 5 contacts → | ||||
Exact match “CleanTech Capital Advisors (CCA) is a pioneering corporate finance advisory firm, providing transaction advisory services for companies in the CleanTech sector.” Recorded in the RevenueBase company graph · Sep 29, 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 “venture capital cleantech firms”. 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 81 venture capital cleantech firms based in London, United Kingdom
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Venture capital cleantech firms based in London, United Kingdom at a glance
As of Sep 29, 2026Companies by employee count
Email recency for this list is measured across the whole United Kingdom list rather than for London, so it is reported there. Company counts and contact totals on this page are exact for London, over 81 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 London, United Kingdom whose business descriptions match “venture capital cleantech firms” 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 409 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 29, 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 “venture capital cleantech firms”; each Exact match badge shows search membership, not an individual similarity or quality score.
How many venture capital cleantech firms are there based in London, United Kingdom?
RevenueBase identified 81 company matches for venture capital cleantech firms associated with London, 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?
Octopus Energy Generation tops the displayed preview by professional contacts tracked in RevenueBase. Recorded headquarters appear in the company rows.
Which city in the United Kingdom has the most venture capital cleantech firms?
London leads the United Kingdom with 81 company records, followed by Bristol (3) and Edinburgh (2).
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 409 professional contacts with verified work emails tracked across these 81 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 29, 2026.
Ready to reach these companies? Verified emails and direct dials for all 81 venture capital cleantech firms based in London, United Kingdom. Start with a free account, no credit card.
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Venture capital cleantech firms by geography
- Venture capital cleantech firms based in Paris, France
- Venture capital cleantech firms based in Houston, United States
- Venture capital cleantech firms based in New York, United States
- Venture capital cleantech firms based in San Francisco, United States
- Venture capital cleantech firms based in Australia
- Venture capital cleantech firms based in Canada
- Venture capital cleantech firms based in France
- Venture capital cleantech firms based in Germany
- Venture capital cleantech firms based in India
- Venture capital cleantech firms based in the Netherlands
- Venture capital cleantech firms based in Norway
- Venture capital cleantech firms based in Spain
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
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- Lists A-Z
- New lists
- Venture capital cleantech firms based in Paris, France
- Venture capital cleantech firms based in Houston, United States
- Venture capital cleantech firms based in New York, United States
- Venture capital cleantech firms based in San Francisco, United States
- Venture capital cleantech firms based in Australia
- Venture capital cleantech firms based in Canada
Company intelligence · public preview
Top 25 venture capital cleantech firms based in London, 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 81 matching company records for venture capital cleantech firms based in London, United Kingdom, with 765 tracked contacts and 409 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 29, 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 venture capital cleantech firms based in London, 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 |  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 29, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 2 |  Climate Investment CIclimateinvestment.comHQ: London, United KingdomReported employees: 51-200 | London, United Kingdom | 51-200 | Exact match | 62 contacts → |
“Climate Investment is a US and UK-based independently managed specialist investor focused on accelerating capital-efficient decarbonization of heavy emitting sectors.” Recorded description excerpt · September 29, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 3 |  Green Angel Venturesgreenangelventures.comHQ: London, United KingdomReported employees: 11-50 | London, United Kingdom | 11-50 | Exact match | 43 contacts → |
“The reference early stage investor for UK climate innovation.” Recorded description excerpt · September 29, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 4 |  National Energynational.energyHQ: London, United KingdomReported employees: 51-200 | London, United Kingdom | 51-200 | Exact match | 41 contacts → |
“Founded in 2018 by ambitious entrepreneurs, National Energy is a US-backed, privately funded group active globally across the renewable energy sector.” Recorded description excerpt · September 29, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 5 |  AP Venturesapventures.comHQ: London, United KingdomReported employees: 11-50 | London, United Kingdom | 11-50 | Exact match | 31 contacts → |
“AP Ventures is an independent venture capital firm headquartered in London, with offices in San Francisco and South Africa.” Recorded description excerpt · September 29, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 6 |  ETF Partnersetfpartners.capitalHQ: London, United KingdomReported employees: 11-50 | London, United Kingdom | 11-50 | Exact match | 29 contacts → |
“Founded in 2005, ETF Partners (The Environmental Technologies Fund) stands as Europe's original venture capital firm dedicated to sustainability and impact investing.” Recorded description excerpt · September 29, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 7 |  RAW Venturesrawventures.comHQ: London, United KingdomReported employees: 11-50 | London, United Kingdom | 11-50 | Exact match | 29 contacts → |
“With European roots and decades of experience, we invest globally in exceptional startups and talented teams.” Recorded description excerpt · September 29, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 8 |  Carbon Limiting Technologiescarbonlimitingtechnologies.comHQ: London, United KingdomReported employees: 11-50 | London, United Kingdom | 11-50 | Exact match | 24 contacts → |
“At CLT, we believe clean technology is essential to building a resilient, competitive, and sustainable economy.” Recorded description excerpt · September 29, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 9 |  C5 Capitalc5capital.comHQ: London, United KingdomReported employees: 11-50 | London, United Kingdom | 11-50 | Exact match | 24 contacts → |
“C5 Capital is a specialist Venture Capital Firm focused on cybersecurity, space and energy security.” Recorded description excerpt · September 29, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 10 | Taranistaranis.eu HQ: London, United KingdomReported employees: 1-10 | London, United Kingdom | 1-10 | Exact match | 19 contacts → |
“Taranis is an investment and asset management company owned by the Perenco Group.” Recorded description excerpt · September 29, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 11 |  Clean Energy Transition LLPcleanenergytransition.comHQ: London, United KingdomReported employees: 11-50 | London, United Kingdom | 11-50 | Exact match | 14 contacts → |
“Clean Energy Transition LLP is an investment management partnership focused on fundamental equity investing.” Recorded description excerpt · September 29, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 12 |  Clean Growth Fundcleangrowthfund.comHQ: London, United KingdomReported employees: 1-10 | London, United Kingdom | 1-10 | Exact match | 13 contacts → |
“CGF invest in tech innovations that reduce greenhouse gas emissions or improve resource efficiency across power, transport, industry, buildings, waste and water.” Recorded description excerpt · September 29, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 13 |  Buckthorn Partners LLPbuckthornpartners.comHQ: London, United KingdomReported employees: 1-10 | London, United Kingdom | 1-10 | Exact match | 11 contacts → |
“Buckthorn invests in industrial businesses providing products and services that support the growth and integration of renewable energy, lower emissions, energy efficiency and…” Recorded description excerpt · September 29, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 14 |  Sustensusten.comHQ: London, United KingdomReported employees: 11-50 | London, United Kingdom | 11-50 | Exact match | 11 contacts → |
“We invest in new energy technologies.” Recorded description excerpt · September 29, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 15 |  Telis Energytelisenergy.comHQ: London, United KingdomReported employees: 1-10 | London, United Kingdom | 1-10 | Exact match | 11 contacts → |
“Telis Energy is a UK-based green energy projects developer and investor.” Recorded description excerpt · September 29, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 16 |  Magnesium Capital LLPmagnesiumcapital.comHQ: London, United KingdomReported employees: 1-10 | London, United Kingdom | 1-10 | Exact match | 9 contacts → |
“Magnesium Capital is a growth-oriented private equity firm based in London that focuses on investing in fast-growing technology and tech-led businesses that are transforming the…” Recorded description excerpt · September 29, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 17 |  First Imaginefirstimagine.comHQ: London, United KingdomReported employees: 1-10 | London, United Kingdom | 1-10 | Exact match | 9 contacts → |
“Early-stage venture capital investor focused on technologies driving the Energy transition.” Recorded description excerpt · September 29, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 18 |  Futuraiserfuturaiser.comHQ: London, United KingdomReported employees: 11-50 | London, United Kingdom | 11-50 | Exact match | 9 contacts → |
“Investments and consulting services” Recorded description excerpt · September 29, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 19 |  Blume Equityblumeequity.comHQ: London, United KingdomReported employees: 1-10 | London, United Kingdom | 1-10 | Exact match | 8 contacts → |
“Blume Equity is a climate-tech growth equity firm with offices in London and Amsterdam focusing on companies driving sustainable outcomes for planet and people.” Recorded description excerpt · September 29, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 20 |  Conduit Ventures Limitedconduit-ventures.comHQ: London, United KingdomReported employees: 1-10 | London, United Kingdom | 1-10 | Exact match | 8 contacts → |
“Impact-driven venture and growth capital fund centred on Energy Decarbonization, Hydrogen, Water risks/Food Security and AI driven solutions.” Recorded description excerpt · September 29, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 21 |  Susgensusgen.comHQ: London, United KingdomReported employees: 1-10 | London, United Kingdom | 1-10 | Exact match | 7 contacts → |
“Susgen is a London-based private investment firm focused on fighting climate change.” Recorded description excerpt · September 29, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 22 |  Ecopragma Capital LLPecopragma.capitalHQ: London, United KingdomReported employees: 1-10 | London, United Kingdom | 1-10 | Exact match | 7 contacts → |
“EcoPragma is dedicated to the net zero transition.” Recorded description excerpt · September 29, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 23 |  Ekta Partnersektapartners.comHQ: London, United KingdomReported employees: 1-10 | London, United Kingdom | 1-10 | Exact match | 7 contacts → |
“Ekta raises capital for companies addressing environmental and social challenges through technology and innovation.” Recorded description excerpt · September 29, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 24 | HQ: London, United KingdomReported employees: 1-10 | London, United Kingdom | 1-10 | Exact match | 6 contacts → |
“Investing in technology companies that enable a more sustainable built environment.” Recorded description excerpt · September 29, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 25 | Cleantech Capital Advisorscleantechcapitaladvisors.com HQ: London, United KingdomReported employees: 1-10 | London, United Kingdom | 1-10 | Exact match | 5 contacts → |
“CleanTech Capital Advisors (CCA) is a pioneering corporate finance advisory firm, providing transaction advisory services for companies in the CleanTech sector.” Recorded description excerpt · September 29, 2026Open company data in RevenueBase ↗Free signup required. | |||||
Showing 25 of 81 company matches
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Venture capital cleantech firms: dataset insights
September 29, 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
81 records in the displayed employee bands.
0 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 across the whole United Kingdom list rather than for London, so it is reported there. Company counts and contact totals on this page are exact for London, over 81 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 29, 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 venture capital cleantech firms?
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 venture capital cleantech firms did RevenueBase find based in London, United Kingdom?
The saved snapshot records 81 matching company records, 765 tracked contacts and 409 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 29, 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
Venture capital cleantech firms by geography
- Venture capital cleantech firms based in Paris, France
- Venture capital cleantech firms based in Houston, United States
- Venture capital cleantech firms based in New York, United States
- Venture capital cleantech firms based in San Francisco, United States
- Venture capital cleantech firms based in Australia
- Venture capital cleantech firms based in Canada
- Venture capital cleantech firms based in France
- Venture capital cleantech firms based in Germany
- Venture capital cleantech firms based in India
- Venture capital cleantech firms based in the Netherlands
- Venture capital cleantech firms based in Norway
- Venture capital cleantech firms based in Spain
Cite this list
RevenueBase Data Team. Top 25 venture capital cleantech firms based in London, United Kingdom. Snapshot: September 29, 2026. https://revenuebase.ai/companies/venture-capital-cleantech-firms/united-kingdom/london.
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
- Venture capital cleantech firms based in Paris, France
- Venture capital cleantech firms based in Houston, United States
- Venture capital cleantech firms based in New York, United States
- Venture capital cleantech firms based in San Francisco, United States
- Venture capital cleantech firms based in Australia
- Venture capital cleantech firms based in Canada
Company intelligence · public preview
Top 25 venture capital cleantech firms based in London, United Kingdom
RevenueBase records 81 matching company records for venture capital cleantech firms based in London, United Kingdom, with 765 tracked contacts and 409 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 29, 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 venture capital cleantech firms based in London, 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 | 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 29, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 2 | Climate Investment CIclimateinvestment.com HQ: London, United KingdomReported employees: 51-200 | London, United Kingdom | 51-200 | Exact match | 62 contacts → |
“Climate Investment is a US and UK-based independently managed specialist investor focused on accelerating capital-efficient decarbonization of heavy emitting sectors.” Recorded description excerpt · September 29, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 3 | Green Angel Venturesgreenangelventures.com HQ: London, United KingdomReported employees: 11-50 | London, United Kingdom | 11-50 | Exact match | 43 contacts → |
“The reference early stage investor for UK climate innovation.” Recorded description excerpt · September 29, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 4 | National Energynational.energy HQ: London, United KingdomReported employees: 51-200 | London, United Kingdom | 51-200 | Exact match | 41 contacts → |
“Founded in 2018 by ambitious entrepreneurs, National Energy is a US-backed, privately funded group active globally across the renewable energy sector.” Recorded description excerpt · September 29, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 5 | AP Venturesapventures.com HQ: London, United KingdomReported employees: 11-50 | London, United Kingdom | 11-50 | Exact match | 31 contacts → |
“AP Ventures is an independent venture capital firm headquartered in London, with offices in San Francisco and South Africa.” Recorded description excerpt · September 29, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 6 | ETF Partnersetfpartners.capital HQ: London, United KingdomReported employees: 11-50 | London, United Kingdom | 11-50 | Exact match | 29 contacts → |
“Founded in 2005, ETF Partners (The Environmental Technologies Fund) stands as Europe's original venture capital firm dedicated to sustainability and impact investing.” Recorded description excerpt · September 29, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 7 | RAW Venturesrawventures.com HQ: London, United KingdomReported employees: 11-50 | London, United Kingdom | 11-50 | Exact match | 29 contacts → |
“With European roots and decades of experience, we invest globally in exceptional startups and talented teams.” Recorded description excerpt · September 29, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 8 | Carbon Limiting Technologiescarbonlimitingtechnologies.com HQ: London, United KingdomReported employees: 11-50 | London, United Kingdom | 11-50 | Exact match | 24 contacts → |
“At CLT, we believe clean technology is essential to building a resilient, competitive, and sustainable economy.” Recorded description excerpt · September 29, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 9 | C5 Capitalc5capital.com HQ: London, United KingdomReported employees: 11-50 | London, United Kingdom | 11-50 | Exact match | 24 contacts → |
“C5 Capital is a specialist Venture Capital Firm focused on cybersecurity, space and energy security.” Recorded description excerpt · September 29, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 10 | Taranistaranis.eu HQ: London, United KingdomReported employees: 1-10 | London, United Kingdom | 1-10 | Exact match | 19 contacts → |
“Taranis is an investment and asset management company owned by the Perenco Group.” Recorded description excerpt · September 29, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 11 | Clean Energy Transition LLPcleanenergytransition.com HQ: London, United KingdomReported employees: 11-50 | London, United Kingdom | 11-50 | Exact match | 14 contacts → |
“Clean Energy Transition LLP is an investment management partnership focused on fundamental equity investing.” Recorded description excerpt · September 29, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 12 | Clean Growth Fundcleangrowthfund.com HQ: London, United KingdomReported employees: 1-10 | London, United Kingdom | 1-10 | Exact match | 13 contacts → |
“CGF invest in tech innovations that reduce greenhouse gas emissions or improve resource efficiency across power, transport, industry, buildings, waste and water.” Recorded description excerpt · September 29, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 13 | Buckthorn Partners LLPbuckthornpartners.com HQ: London, United KingdomReported employees: 1-10 | London, United Kingdom | 1-10 | Exact match | 11 contacts → |
“Buckthorn invests in industrial businesses providing products and services that support the growth and integration of renewable energy, lower emissions, energy efficiency and…” Recorded description excerpt · September 29, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 14 | Sustensusten.com HQ: London, United KingdomReported employees: 11-50 | London, United Kingdom | 11-50 | Exact match | 11 contacts → |
“We invest in new energy technologies.” Recorded description excerpt · September 29, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 15 | Telis Energytelisenergy.com HQ: London, United KingdomReported employees: 1-10 | London, United Kingdom | 1-10 | Exact match | 11 contacts → |
“Telis Energy is a UK-based green energy projects developer and investor.” Recorded description excerpt · September 29, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 16 | Magnesium Capital LLPmagnesiumcapital.com HQ: London, United KingdomReported employees: 1-10 | London, United Kingdom | 1-10 | Exact match | 9 contacts → |
“Magnesium Capital is a growth-oriented private equity firm based in London that focuses on investing in fast-growing technology and tech-led businesses that are transforming the…” Recorded description excerpt · September 29, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 17 | First Imaginefirstimagine.com HQ: London, United KingdomReported employees: 1-10 | London, United Kingdom | 1-10 | Exact match | 9 contacts → |
“Early-stage venture capital investor focused on technologies driving the Energy transition.” Recorded description excerpt · September 29, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 18 | Futuraiserfuturaiser.com HQ: London, United KingdomReported employees: 11-50 | London, United Kingdom | 11-50 | Exact match | 9 contacts → |
“Investments and consulting services” Recorded description excerpt · September 29, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 19 | Blume Equityblumeequity.com HQ: London, United KingdomReported employees: 1-10 | London, United Kingdom | 1-10 | Exact match | 8 contacts → |
“Blume Equity is a climate-tech growth equity firm with offices in London and Amsterdam focusing on companies driving sustainable outcomes for planet and people.” Recorded description excerpt · September 29, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 20 | Conduit Ventures Limitedconduit-ventures.com HQ: London, United KingdomReported employees: 1-10 | London, United Kingdom | 1-10 | Exact match | 8 contacts → |
“Impact-driven venture and growth capital fund centred on Energy Decarbonization, Hydrogen, Water risks/Food Security and AI driven solutions.” Recorded description excerpt · September 29, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 21 | Susgensusgen.com HQ: London, United KingdomReported employees: 1-10 | London, United Kingdom | 1-10 | Exact match | 7 contacts → |
“Susgen is a London-based private investment firm focused on fighting climate change.” Recorded description excerpt · September 29, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 22 | Ecopragma Capital LLPecopragma.capital HQ: London, United KingdomReported employees: 1-10 | London, United Kingdom | 1-10 | Exact match | 7 contacts → |
“EcoPragma is dedicated to the net zero transition.” Recorded description excerpt · September 29, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 23 | Ekta Partnersektapartners.com HQ: London, United KingdomReported employees: 1-10 | London, United Kingdom | 1-10 | Exact match | 7 contacts → |
“Ekta raises capital for companies addressing environmental and social challenges through technology and innovation.” Recorded description excerpt · September 29, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 24 | HQ: London, United KingdomReported employees: 1-10 | London, United Kingdom | 1-10 | Exact match | 6 contacts → |
“Investing in technology companies that enable a more sustainable built environment.” Recorded description excerpt · September 29, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 25 | Cleantech Capital Advisorscleantechcapitaladvisors.com HQ: London, United KingdomReported employees: 1-10 | London, United Kingdom | 1-10 | Exact match | 5 contacts → |
“CleanTech Capital Advisors (CCA) is a pioneering corporate finance advisory firm, providing transaction advisory services for companies in the CleanTech sector.” Recorded description excerpt · September 29, 2026Open company data in RevenueBase ↗Free signup required. | |||||
Showing 25 of 81 company matches
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Venture capital cleantech firms: dataset insights
September 29, 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
81 records in the displayed employee bands.
0 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 across the whole United Kingdom list rather than for London, so it is reported there. Company counts and contact totals on this page are exact for London, over 81 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 29, 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 venture capital cleantech firms?
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 venture capital cleantech firms did RevenueBase find based in London, United Kingdom?
The saved snapshot records 81 matching company records, 765 tracked contacts and 409 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 29, 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
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Cite this list
RevenueBase Data Team. Top 25 venture capital cleantech firms based in London, United Kingdom. Snapshot: September 29, 2026. https://revenuebase.ai/companies/venture-capital-cleantech-firms/united-kingdom/london.
This is a selected public preview of saved company records, rather than an independently verified census. Open the source page ↗
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- Venture capital cleantech firms based in Paris, France
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