Company lists · Data refreshed November 2026

Top 25 Cleantech startup investors worldwide

RevenueBase identified 2,557 company matches for cleantech startup investors worldwide as of November 2026 and tracks 25,920 professional contacts across them, including 8,022 with verified work emails. The United States is the largest market and London the largest hub.

This list covers company matches for cleantech startup investors worldwide, 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 November 6, 2026. Country and city lists for cleantech startup investors follow the table.

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.

How to read this list RevenueBase SmartSearch · Exact Recorded Nov 6, 2026 How this list was built
2,557Companies
25,920Contacts tracked
8,022Verified emails
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The 25 largest cleantech startup investors worldwide

Ranked by team size
Top 25 of 2,557 company matches for cleantech startup investors worldwide, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Nov 6, 2026. The RevenueBase SmartSearch column shows Exact match membership in this saved search. Click a contact count to view that company's people. Totals use company locations recorded by RevenueBase; the displayed preview is a smaller selection.
#CompanyRevenueBase SmartSearchHeadquartersEmployeesContacts
1Exact matchAbu Dhabi, United Arab EmiratesHQ recorded Nov 6, 2026501-1,0001,113 contacts →

Exact match

“Established in 2006, Masdar is a global clean energy leader, transforming how the world produces and consumes energy through bold innovation and commercial excellence.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
2Exact matchHyderabad, IndiaHQ recorded Nov 6, 2026n/a939 contacts →

Exact match

“Venture capital (VC) is a type of private equity financing provided by investors to early-stage, high-potential, and high-risk startups or growing companies.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
3Exact matchAhmedabad, IndiaHQ recorded Nov 6, 2026201-500541 contacts →

Exact match

“Claris Ltd.(Claris) is a holding company established with a long-term objective of diversifying to multiple businesses, driven by the spirit of innovation & desire to make…”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
4Exact matchGurgaon, IndiaHQ recorded Nov 6, 2026501-1,000464 contacts →

Exact match

“Chakr Innovation is a pioneering Indian cleantech startup, founded by IIT Delhi graduates, dedicated to revolutionizing air quality with cutting-edge material science technology.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
5Exact matchVancouver, ON, CanadaHQ recorded Nov 6, 2026201-500286 contacts →

Exact match

“Haywood Securities is an investment firm that values its independence and its entrepreneurial spirit.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
6Exact matchLondon, United KingdomHQ recorded Nov 6, 202651-200275 contacts →

Exact match

“IP Group accelerates the impact of science for a better future.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
7Exact matchAnnapolis, NY, United StatesHQ recorded Nov 6, 202651-200231 contacts →

Exact match

“HASI invests in sustainable infrastructure assets advancing the energy transition.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
8Exact matchMenlo Park, CA, United StatesHQ recorded Nov 6, 202651-200203 contacts →

Exact match

“Khosla Ventures invests in companies that are bold, early and impactful.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
9Exact matchSydney, AustraliaHQ recorded Nov 6, 202651-200181 contacts →

Exact match

“The CEFC is Australia’s specialist climate investor, helping cut emissions in the race towards net zero by 2050.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
10Exact matchLondon, United KingdomHQ recorded Nov 6, 2026201-500173 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 · Nov 6, 2026 · View company records in RevenueBase
11Exact matchKuala Lumpur, MalaysiaHQ recorded Nov 6, 202651-200160 contacts →

Exact match

“Since 2002, Gobi has overseen US$2 billion AUM across more than 30 investment vehicles, and its team of 80+ professionals now manages a portfolio of over 400 companies from 18…”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
12Exact matchBonn, GermanyHQ recorded Nov 6, 202651-200157 contacts →

Exact match

“HTGF is one of the leading and most active VC investors in Germany and Europe, financing start-ups in the fields of Deep Tech, Industrial Tech, Climate Tech, Digital Tech, Life…”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
13Exact matchBoston, MA, United StatesHQ recorded Nov 6, 202651-200156 contacts →

Exact match

“The Massachusetts Clean Energy Center is a state economic development agency dedicated to accelerating the growth of the clean energy and climatetech sector across the…”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
14Exact matchKirkland, United StatesHQ recorded Nov 6, 202651-200153 contacts →

Exact match

“Breakthrough Energy backs companies developing the next generation of clean energy solutions.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
15Exact matchLondon, United KingdomHQ recorded Nov 6, 202651-200152 contacts →

Exact match

“Lightrock is a global investment platform supporting the growth of technology-enabled companies.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
16Exact matchNew York, United StatesHQ recorded Nov 6, 202651-200149 contacts →

Exact match

“Energy Impact Partners LP (EIP) is a global energy technology investor with a proprietary model designed to drive innovation.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
17Exact matchAmsterdam, NetherlandsHQ recorded Nov 6, 202611-50147 contacts →

Exact match

“Rockstart is an early stage investor that empowers purpose-driven founders across three domains: Energy, AgriFood, and Emerging Technologies.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
18Exact matchBerkeley, CA, United StatesHQ recorded Nov 6, 202651-200143 contacts →

Exact match

“New Energy Nexus (NEX) is the world's leading ecosystem of funds and accelerators supporting diverse clean energy entrepreneurs to thrive, from emerging tech through to clean…”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
19Exact matchSummit, CA, United StatesHQ recorded Nov 6, 202651-200137 contacts →

Exact match

“ECP (Energy Capital Partners) is an investor in critical infrastructure focused on electrification, decarbonization, reliability and sustainability.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
20Exact matchPalo Alto, United StatesHQ recorded Nov 6, 202611-50133 contacts →

Exact match

“Sutter Hill Ventures has financed technology-based start-ups and assisted entrepreneurs in building market-leading companies since 1962.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
21Exact matchDubai, United Arab EmiratesHQ recorded Nov 6, 2026501-1,000132 contacts →

Exact match

“At KEF Holdings we invest in businesses that are innovative, sustainable, cost-effective and deliver positive disruptive solutions across core business sectors encompassing…”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
22Exact matchJerusalem, IsraelHQ recorded Nov 6, 202611-50129 contacts →

Exact match

“Jerusalem Venture Partners (JVP) is an internationally renowned venture capital fund.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
23Exact matchZurich, SwitzerlandHQ recorded Nov 6, 202651-200121 contacts →

Exact match

“Energy Infrastructure Partners invests in energy infrastructure for decades to create exceptional value for our clients and partners.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
24Exact matchNew York, NY, United StatesHQ recorded Nov 6, 202651-200119 contacts →

Exact match

“Speed and efficiency are the cornerstones of climate finance.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
25Exact matchLos Angeles, CA, United StatesHQ recorded Nov 6, 202611-50119 contacts →

Exact match

“The Cleantech Open runs the world's largest cleantech accelerator.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase

Showing 25 of 2,557 cleantech startup investors worldwide

See the full list, filter by size, metro and specialty, and access 8,022 tracked professional contacts with verified work emails. Direct dials are available where recorded.

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Cleantech startup investors worldwide at a glance

As of Nov 6, 2026
30.9%Verified-email coverage
10.1Average contacts per company
1-10Median size (employees)
5.2%Largest-city concentration · London
Nov 6, 2026Page data refreshed

Companies by employee count

1-10
1,738
11-50
627
51-200
109
201-500
48
501-1,000
13
1,001-5,000
5
5,001-10,000
1
10001+
4

Email recency is reported on each country list linked below.

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.
Coverage
Every country. Country and city lists for cleantech startup investors are linked below.
What qualifies
Company records worldwide whose business descriptions match “cleantech startup investors” 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. 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 8,022 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 November 6, 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.

Cleantech startup investors by location

27 lists · largest first

Every Cleantech startup investors list RevenueBase publishes, by country and city. Counts are matching companies in each list as of its own refresh date.

Countries

Cities

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 startup investors”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many cleantech startup investors are there worldwide?

RevenueBase identified 2,557 company matches for cleantech startup investors worldwide as of November 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?

Masdar ABU Dhabi Future Energy Company tops the displayed preview by professional contacts tracked in RevenueBase. Recorded headquarters appear in the company rows.

Which country has the most cleantech startup investors?

The United States leads with 648 companies, followed by the United Kingdom (184) and Germany (97). Every cleantech startup investors list by country and city is linked on this page.

Which city has the most cleantech startup investors?

London leads with 133 company records, followed by New York (72) and San Francisco (56).

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 8,022 professional contacts with verified work emails tracked across these 2,557 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 November 6, 2026.

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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.