Company lists · Data refreshed September 2026

Top 25 Clean tech companies worldwide

Name: Clean tech companies worldwide
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 19, 2026 22,321 companies tracked

RevenueBase identified 22,321 company matches for clean tech companies worldwide as of September 2026 and tracks 595,185 professional contacts across them, including 171,518 with verified work emails. The United States is the largest market and London the largest hub.

This list covers company matches for clean tech companies 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 September 19, 2026. Country and city lists for clean tech companies 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 Sep 19, 2026 How this list was built

22,321Companies

595,185Contacts tracked

171,518Verified emails

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The 25 largest clean tech companies worldwide

Ranked by team size

Top 25 of 22,321 company matches for clean tech companies worldwide, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Sep 19, 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.
#	Company	RevenueBase SmartSearch	Headquarters	Employees	Contacts
1	Johnson Controls	Exact match	Cork, IrelandHQ recorded Sep 19, 2026	10001+	52,736 contacts →
	Exact match “Johnson Controls is a global leader in thermal management, mission-critical building systems, energy efficiency and decarbonization.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
2	EDF	Exact match	Paris, FranceHQ recorded Sep 19, 2026	10001+	44,842 contacts →
	Exact match “Our raison d'être is to build a net zero energy future with electricity and innovative solutions and services, to help save the planet and drive wellbeing and economic development.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
3	GE Vernova	Exact match	Boston, MA, United StatesHQ recorded Sep 19, 2026	10001+	29,528 contacts →
	Exact match “GE Vernova is a purpose-built energy technology company on a mission to electrify to thrive and decarbonize the world.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
4	Acciona	Exact match	Madrid, SpainHQ recorded Sep 19, 2026	10001+	27,028 contacts →
	Exact match “ACCIONA champions a different way of doing business: Business as Unusual, delivering benefits far beyond the corporate realm.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
5	Technipfmc	Exact match	Newcastle Upon Tyne, United KingdomHQ recorded Sep 19, 2026	10001+	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
6	Subsea7	Exact match	London, United KingdomHQ recorded Sep 19, 2026	10001+	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
7	Engie Solutions France	Exact match	La Garenne-colombes, FranceHQ recorded Sep 19, 2026	10001+	12,011 contacts →
	Exact match “Les activités Infrastructures Energétiques Locales d’ENGIE accompagnent les collectivités, les industries et le secteur du bâtiment sur la voie de la décarbonation.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
8	TRANE	Exact match	Davidson, NC, United StatesHQ recorded Sep 19, 2026	10001+	10,272 contacts →
	Exact match “Trane is the building technology and energy solutions leader who deploys a depth and breadth of expertise, backgrounds, and perspectives to innovate new technologies and…” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
9	Carrier Hvac	Exact match	United StatesHQ recorded Sep 19, 2026	10001+	10,099 contacts →
	Exact match “Carrier is a global leader in intelligent climate and energy solutions, pioneering sustainable innovations in climate technologies.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
10	Dalkia	Exact match	Saint-andré-lez-lille, FranceHQ recorded Sep 19, 2026	10001+	8,427 contacts →
	Exact match “Dalkia : ensemble, relevons le défi climatique!” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
11	Johnson Matthey	Exact match	London, ItalyHQ recorded Sep 19, 2026	5,001-10,000	8,053 contacts →
	Exact match “Johnson Matthey (JM) is a world leader in platinum group metals (PGMs).” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
12	EDP	Exact match	Lisbon, PortugalHQ recorded Sep 19, 2026	10001+	6,435 contacts →
	Exact match “Our story began 50 years ago.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
13	Alfanar	Exact match	Riyadh, Saudi ArabiaHQ recorded Sep 19, 2026	10001+	6,383 contacts →
	Exact match “alfanar builds efficient energy systems & solutions of the present and sets up infrastructures for a brighter future.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
14	The AES Corporation	Exact match	Arlington, VA, United StatesHQ recorded Sep 19, 2026	5,001-10,000	5,387 contacts →
	Exact match “The world no longer thinks of energy as a matter of supply and demand.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
15	Enel Green Power	Exact match	Roma, ItalyHQ recorded Sep 19, 2026	5,001-10,000	5,251 contacts →
	Exact match “We are the Enel Group company dedicated to the development and management of renewable energy generation worldwide.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
16	RENEW	Exact match	Gurugram, IndiaHQ recorded Sep 19, 2026	1,001-5,000	4,340 contacts →
	Exact match “ReNew is a leading decarbonisation solutions provider and the first Indian clean energy company to list on Nasdaq (Nasdaq: RNW).” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
17	Octopus Energy	Exact match	London, United KingdomHQ recorded Sep 19, 2026	1,001-5,000	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
18	Generac	Exact match	Waukesha, WI, United StatesHQ recorded Sep 19, 2026	5,001-10,000	3,797 contacts →
	Exact match “Generac is the total energy solutions company powering a smarter world.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
19	Adani Green Energy LTD	Exact match	United StatesHQ recorded Sep 19, 2026	1,001-5,000	3,017 contacts →
	Exact match “Adani Green Energy Limited (AGEL) is India’s largest renewable energy company playing a vital role in enabling the clean energy transition.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
20	Veolia UK	Exact match	London, United KingdomHQ recorded Sep 19, 2026	10001+	2,823 contacts →
	Exact match “Veolia UK provides solutions for ecological transformation which means reconciling human progress with environmental protection.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
21	FTI	Exact match	Menasha, WI, United StatesHQ recorded Sep 19, 2026	1,001-5,000	2,741 contacts →
	Exact match “Faith Technologies Incorporated (FTI) is a dynamic organization comprised of construction, engineering, manufacturing and renewable energy experts.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
22	Tata Power Renewable Energy Limited	Exact match	Mumbai, IndiaHQ recorded Sep 19, 2026	501-1,000	2,660 contacts →
	Exact match “Tata Power Renewable Energy Limited (TPREL) is one of India’s leading renewable energy companies, driving the transition towards a cleaner, more resilient and sustainable energy…” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
23	ENAP	Exact match	Las Condes, ChileHQ recorded Sep 19, 2026	1,001-5,000	2,630 contacts →
	Exact match “Diariamente nos mueve crear más y mejores fuentes de energía para el desarrollo de los países y las futuras generaciones.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
24	Topsoe	Exact match	Kongens Lyngby, United StatesHQ recorded Sep 19, 2026	1,001-5,000	2,616 contacts →
	Exact match “Topsoe is a leading global provider of technology and solutions for the energy transition.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
25	Greenko Group	Exact match	Hyderabad, IndiaHQ recorded Sep 19, 2026	1,001-5,000	2,578 contacts →
	Exact match “Greenko, is one of the World’s leading Energy Transition and Decarbonization solutions company, with an installed Renewable Energy capacity of ~7.5 GW across Wind, Solar and Hydro…” 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 “clean tech companies”. 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 22,321 clean tech companies worldwide

See the full list, filter by size, metro and specialty, and access 171,518 tracked professional contacts with verified work emails. Direct dials are available where recorded.

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Clean tech companies worldwide at a glance

As of Sep 19, 2026

28.8%Verified-email coverage

26.7Average contacts per company

1-10Median size (employees)

1.4%Largest-city concentration · London

Sep 19, 2026Page data refreshed

Companies by employee count

1-10

11,690

11-50

7,516

51-200

2,100

201-500

529

501-1,000

178

1,001-5,000

160

5,001-10,000

10001+

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 clean tech companies are linked below.
What qualifies: Company records worldwide whose business descriptions match “clean tech companies” 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 171,518 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.

Clean tech companies by location

98 lists · largest first

Every Clean tech companies 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 “clean tech companies”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many clean tech companies are there worldwide?

RevenueBase identified 22,321 company matches for clean tech companies worldwide 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?

Johnson Controls tops the displayed preview by professional contacts tracked in RevenueBase. Recorded headquarters appear in the company rows.

Which country has the most clean tech companies?

The United States leads with 3,164 companies, followed by India (1,601) and Brazil (1,523). Every clean tech companies list by country and city is linked on this page.

Which city has the most clean tech companies?

London leads with 310 company records, followed by Sao Paulo (188) and Madrid (166).

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 171,518 professional contacts with verified work emails tracked across these 22,321 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.

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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.