Company lists · Data refreshed September 2026

Top 25 Climate tech companies worldwide

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

Compiled by the RevenueBase Data Team Data refreshed Sep 19, 2026 2,848 companies tracked

RevenueBase identified 2,848 climate tech companies worldwide as of September 2026 and tracks 91,947 professional contacts across them, including 34,047 with verified work emails and 0 with mobile numbers. The United States is the largest market and London the largest hub.

This list covers climate tech companies worldwide, matched on what each company actually does as described in its own words. Ranked by team size, largest first. Every row shows the company's own description, its RevenueBase Smart Search rating, and when it was last checked. Data refreshed September 19, 2026. Country and city lists for climate tech companies follow the table.

Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase Smart Search, 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 HQ checked on every row RevenueBase Smart Search rating on every row Refreshed Sep 19, 2026 86% judged on-target in blind review

2,848Companies

91,947Contacts tracked

34,047Verified emails

0Mobile numbers

Explore this list → Free signup · no credit card · 500 free credits

The 25 largest climate tech companies worldwide

Ranked by team size

Top 25 of 2,848 climate tech companies worldwide, ranked by team size, largest first. Data refreshed Sep 19, 2026. RevenueBase Smart Search rates how each company's information relates to climate tech companies: strong evidence (its own description names it), partial (names part of it), indirect (matched on the rest of its profile rather than the description shown). Click a contact count to view that company's people.
#	Company	RevenueBase Smart Search	Headquarters	Employees	Contacts
1	Subsea7	Indirect evidence	London, United KingdomHQ checked Sep 19, 2026	10001+	12,645 contacts →
	Indirect evidence “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.” Source: RevenueBase Database · checked Sep 19, 2026
2	Dalkia	Partial evidence	Saint-andré-lez-lille, FranceHQ checked Sep 19, 2026	10001+	8,427 contacts →
	Partial evidence “Dalkia : ensemble, relevons le défi climatique!” Source: RevenueBase Database · checked Sep 19, 2026
3	Johnson Matthey	Indirect evidence	London, ItalyHQ checked Sep 19, 2026	5,001-10,000	8,053 contacts →
	Indirect evidence “Johnson Matthey (JM) is a world leader in platinum group metals (PGMs).” Source: RevenueBase Database · checked Sep 19, 2026
4	Carrier	Partial evidence	Palm Beach Gardens, FL, United StatesHQ checked Sep 19, 2026	10001+	7,665 contacts →
	Partial evidence “Carrier is a global leader in intelligent climate and energy solutions, pioneering sustainable innovations in climate technologies.” Source: RevenueBase Database · checked Sep 19, 2026
5	RENEW	Indirect evidence	Gurugram, IndiaHQ checked Sep 19, 2026	1,001-5,000	4,340 contacts →
	Indirect evidence “ReNew is a leading decarbonisation solutions provider and the first Indian clean energy company to list on Nasdaq (Nasdaq: RNW).” Source: RevenueBase Database · checked Sep 19, 2026
6	Topsoe	Indirect evidence	Kongens Lyngby, United StatesHQ checked Sep 19, 2026	1,001-5,000	2,616 contacts →
	Indirect evidence “Topsoe is a leading global provider of technology and solutions for the energy transition.” Source: RevenueBase Database · checked Sep 19, 2026
7	Mckinstry	Partial evidence	Seattle, WA, United StatesHQ checked Sep 19, 2026	1,001-5,000	2,213 contacts →
	Partial evidence “We're a national construction and energy services company dedicated to innovating the waste and climate harm out of the built environment.” Source: RevenueBase Database · checked Sep 19, 2026
8	Clearesult	Indirect evidence	Austin, TX, United StatesHQ checked Sep 19, 2026	1,001-5,000	2,121 contacts →
	Indirect evidence “CLEAResult is the largest provider of energy efficiency, energy transition and energy sustainability services in North America.” Source: RevenueBase Database · checked Sep 19, 2026
9	Gruppo AB	Indirect evidence	Orzinuovi, United KingdomHQ checked Sep 19, 2026	1,001-5,000	1,081 contacts →
	Indirect evidence “Since 1981, AB has tackled the challenges posed by energy sustainability, working alongside our customers to improve their competitiveness while saving energy and reducing…” Source: RevenueBase Database · checked Sep 19, 2026
10	Franklin Energy	Indirect evidence	Port Washington, WI, United StatesHQ checked Sep 19, 2026	1,001-5,000	838 contacts →
	Indirect evidence “Franklin Energy delivers end-to-end sustainability solutions through a portfolio of intelligent products and services that lower energy costs, reduce carbon and waste, and grow…” Source: RevenueBase Database · checked Sep 19, 2026
11	South Pole	Partial evidence	Zurich, SwitzerlandHQ checked Sep 19, 2026	501-1,000	811 contacts →
	Partial evidence “South Pole is the world's leading carbon asset developer and climate consultancy.” Source: RevenueBase Database · checked Sep 19, 2026
12	Energy Solutions	Partial evidence	Oakland, CA, United StatesHQ checked Sep 19, 2026	201-500	772 contacts →
	Partial evidence “Our mission is simple - to combat climate change through market-based, cost-effective energy, carbon, and water management solutions that make big impacts.” Source: RevenueBase Database · checked Sep 19, 2026
13	NWG S.P.A	Indirect evidence	Prato, ItalyHQ checked Sep 19, 2026	n/a	766 contacts →
	Indirect evidence “Nata a Prato nel 2003 è oggi una delle più importanti realtà nel mercato della Green Economy.” Source: RevenueBase Database · checked Sep 19, 2026
14	KBC A Yokogawa Company	Indirect evidence	Walton-on-thames, United KingdomHQ checked Sep 19, 2026	201-500	658 contacts →
	Indirect evidence “We are passionate about driving sustainable change for our planet.” Source: RevenueBase Database · checked Sep 19, 2026
15	Igreen Energy Oficial	Indirect evidence	Uberlândia, BrazilHQ checked Sep 19, 2026	n/a	625 contacts →
	Indirect evidence “Olá, somos a iGreen Energy, uma empresa Mineira da cidade de Uberlândia que nasceu com o propósito de conscientizar as pessoas e empresas da importância de um futuro melhor…” Source: RevenueBase Database · checked Sep 19, 2026
16	Kvaerner	Indirect evidence	Fornebu, NorwayHQ checked Sep 19, 2026	1,001-5,000	545 contacts →
	Indirect evidence “Kvaerner has merged with Aker Solutions.” Source: RevenueBase Database · checked Sep 19, 2026
17	Sonnen Gmbh	Indirect evidence	Wildpoldsried, GermanyHQ checked Sep 19, 2026	501-1,000	514 contacts →
	Indirect evidence “Clean, affordable energy for all is one of the greatest challenges of our time.” Source: RevenueBase Database · checked Sep 19, 2026
18	GTI Energy	Indirect evidence	Des Plaines, IL, United StatesHQ checked Sep 19, 2026	201-500	513 contacts →
	Indirect evidence “For more than eight decades, GTI Energy has contributed to the strengthening of energy systems and the communities they serve.” Source: RevenueBase Database · checked Sep 19, 2026
19	Westport Fuel Systems	Partial evidence	Vancouver, BC, CanadaHQ checked Sep 19, 2026	51-200	480 contacts →
	Partial evidence “Westport is a clean-tech innovation company, providing simplified solutions to decarbonize.” Source: RevenueBase Database · checked Sep 19, 2026
20	Chakr Innovation	Indirect evidence	Gurugram, IndiaHQ checked Sep 19, 2026	501-1,000	476 contacts →
	Indirect evidence “Chakr Innovation is a pioneering Indian cleantech startup, founded by IIT Delhi graduates, dedicated to revolutionizing air quality with cutting-edge material science technology.” Source: RevenueBase Database · checked Sep 19, 2026
21	Serentica	Indirect evidence	Gurugram, IndiaHQ checked Sep 19, 2026	201-500	470 contacts →
	Indirect evidence “Serentica Renewables India Private Limited,(Serentica) is a is an end-to-end energy solutions company enabling large-scale heavy energy intensive industries and sector to…” Source: RevenueBase Database · checked Sep 19, 2026
22	Groupe Coriance	Indirect evidence	Noisy-le-grand, FranceHQ checked Sep 19, 2026	501-1,000	452 contacts →
	Indirect evidence “Pour une énergie propre et mieux utilisée Notre mission : fournir des solutions énergétiques performantes et économiques, tout en minimisant l'impact environnemental.” Source: RevenueBase Database · checked Sep 19, 2026
23	CRAM	Indirect evidence	Le Havre, FranceHQ checked Sep 19, 2026	501-1,000	448 contacts →
	Indirect evidence “Nous sommes des femmes et des hommes engagés, qui chaque matin se lèvent avec une mission : être des acteurs clés de la transition énergétique.” Source: RevenueBase Database · checked Sep 19, 2026
24	Ecozen	Partial evidence	Pune, IndiaHQ checked Sep 19, 2026	201-500	429 contacts →
	Partial evidence “Ecozen develops climate-smart deeptech solutions and core technology stacks to deliver a sustainable future, including motor controls, IoT, and energy storage.” Source: RevenueBase Database · checked Sep 19, 2026
25	Energy Saving Trust	Indirect evidence	London, United KingdomHQ checked Sep 19, 2026	201-500	426 contacts →
	Indirect evidence “Energy Saving Trust is an independent organisation dedicated to promoting energy efficiency, low carbon transport and sustainable energy use.” Source: RevenueBase Database · checked Sep 19, 2026

RevenueBase Smart Search

RevenueBase Smart Search assesses information from a company’s LinkedIn profile, information supplied directly by the company, its website, and other publicly available sources. It uses that information to rate how closely the company relates to this list’s category: climate tech companies. Every row carries its rating and the description the rating was read from, so each one can be checked rather than taken on trust.

Strong evidence: The company's own public description of its business names climate tech companies.
Partial evidence: Its own public description names part of climate tech companies, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name climate tech companies. The match rests on the rest of the company's public profile rather than the one sentence quoted here, so this is the rating to check first.

RevenueBase Smart Search is how these lists are built: RevenueBase's data engine and AI assemble the companies that match a category defined in a user's own words, so a list can be about what companies actually do rather than about whichever industry code they were filed under.

Showing 25 of 2,848 climate tech companies worldwide

See the full list, filter by size, metro and specialty, and get verified emails and direct dials for all 34,047 reachable decision-makers.

Free signup · no credit card

View the full list →

Climate tech companies worldwide at a glance

As of Sep 19, 2026

37.0%Verified-email coverage

32.3Average contacts per company

1-10Median size (employees)

4.5%Largest-city concentration · London

Sep 19, 2026Page data refreshed

Companies by employee count

1-10

1,574

11-50

927

51-200

238

201-500

501-1,000

1,001-5,000

5,001-10,000

10001+

How this list was built

Company categories are rarely black and white. RevenueBase reads each company's own description of its business to decide whether it belongs among climate tech companies, so some rows will be adjacent to the category rather than pure plays. The description and RevenueBase Smart Search rating on every row are there so you can check each match yourself.

Source: The RevenueBase company graph: 60 million companies and 398.9 million professional contacts resolved from primary sources, queried with RevenueBase Smart Search, the natural-language company search available to every RevenueBase user.
Coverage: 25 countries, largest first: the United States, India, the United Kingdom, Canada, Brazil, Italy, Germany, Australia, France, Spain and 15 more. Country and city lists for climate tech companies are linked below.
What qualifies: Companies worldwide whose own description of what they do matches “climate tech companies”. Matching reads each company's description, not its industry code or its name.
RevenueBase Smart Search: RevenueBase Smart Search is how this list is assembled and how each row is rated. RevenueBase's data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to a category defined in a user's own words. Each row is rated strong evidence (its own description names climate tech companies), partial evidence (it names part of the category) or indirect evidence (the description shown names none of it and the match rests on the rest of the company's profile). The description supporting each rating is quoted on the row.
What we exclude: Companies whose own description does not clearly place them among climate tech companies, and records with no verified work email.
Match quality: In blind human judging of this matching method, 86% of matched companies were on target. Expect roughly 1 in 7 rows to be adjacent to the category rather than a pure play. Every row shows the company's own description and its RevenueBase Smart Search rating so you can judge each match yourself. Read the full methodology: how the lists are built, how the judging worked, and what the figure means.
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 listed company carries at least one verified work email, 34,047 across the full list. 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.
Corrections: Wrong category, wrong headquarters, or a company that has closed? Use “Report an issue” on any row. Reports go to the RevenueBase Data Team and feed back into the company graph.

Climate tech companies by location

27 lists · largest first

Every Climate 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 Smart Search?

RevenueBase Smart Search is how RevenueBase decides which companies belong on this list and how strongly each one fits. Its data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to the category the list is about. Each row is rated strong evidence when the company's own description names climate tech companies, partial evidence when it names part of the category, and indirect evidence when the description shown names none of it and the match rests on the rest of the company's profile.

How many climate tech companies are there worldwide?

RevenueBase identified 2,848 climate tech companies worldwide as of September 2026, matched on each company's own description of what it does rather than its industry code.

What is the largest company on this list?

Subsea7, headquartered in London, tops this list with the largest team on record.

Which country has the most climate tech companies?

The United States leads with 634 companies, followed by India (367) and the United Kingdom (309). Every climate tech companies list by country and city is linked on this page.

Which city has the most climate tech companies?

London leads with 129 headquartered companies, followed by New York (39) and Paris (35).

How do I get contact information for these companies?

A free RevenueBase account lets you run this exact search and work the top results, verified emails and direct dials included. Upgrading unlocks all 34,047 verified decision-maker contacts tracked across these 2,848 companies.

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 2,848 climate tech companies worldwide. Start with a free account, no credit card.

Download this list →

Related lists

Browse the directory

Browse: Companies home · Lists by location · New lists

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 Smart Search, 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.