Company lists · Data refreshed September 2026

Top 25 Sustainable energy developers worldwide

Name: Sustainable energy developers worldwide
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 18, 2026 21,908 companies tracked

RevenueBase identified 21,908 sustainable energy developers worldwide as of September 2026 and tracks 521,409 professional contacts across them, including 142,338 with verified work emails and 0 with mobile numbers. The United States is the largest market and London the largest hub.

This list covers sustainable energy developers 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 18, 2026. Country and city lists for sustainable energy developers 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 18, 2026 86% judged on-target in blind review

21,908Companies

521,409Contacts tracked

142,338Verified emails

0Mobile numbers

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The 25 largest sustainable energy developers worldwide

Ranked by team size

Top 25 of 21,908 sustainable energy developers worldwide, ranked by team size, largest first. Data refreshed Sep 18, 2026. RevenueBase Smart Search rates how each company's information relates to sustainable energy developers: 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	Vestas	Strong evidence	Aarhus, DenmarkHQ checked Sep 18, 2026	10001+	27,085 contacts →
	Strong evidence “Vestas is the energy industry’s global partner on sustainable energy solutions.” Source: RevenueBase Database · checked Sep 18, 2026
2	Acciona	Indirect evidence	Madrid, SpainHQ checked Sep 18, 2026	10001+	27,028 contacts →
	Indirect evidence “ACCIONA champions a different way of doing business: Business as Unusual, delivering benefits far beyond the corporate realm.” Source: RevenueBase Database · checked Sep 18, 2026
3	Siemens Gamesa	Partial evidence	Zamudio, SpainHQ checked Sep 18, 2026	10001+	18,693 contacts →
	Partial evidence “Siemens Gamesa is a global technology leader in the renewable energy industry - specifically in the development, manufacturing, installation and maintenance of wind turbines.” Source: RevenueBase Database · checked Sep 18, 2026
4	RWE	Partial evidence	Essen, GermanyHQ checked Sep 18, 2026	10001+	11,181 contacts →
	Partial evidence “RWE is leading the way to a modern energy world.” Source: RevenueBase Database · checked Sep 18, 2026
5	Sunrun	Partial evidence	San Francisco, CA, United StatesHQ checked Sep 18, 2026	10001+	7,974 contacts →
	Partial evidence “Life runs on clean energy.” Source: RevenueBase Database · checked Sep 18, 2026
6	Ørsted	Partial evidence	Fredericia, United StatesHQ checked Sep 18, 2026	5,001-10,000	7,538 contacts →
	Partial evidence “Ørsted is the global leader in offshore wind power and is one of the largest renewable energy companies in the world.” Source: RevenueBase Database · checked Sep 18, 2026
7	Suzlon Group	Partial evidence	Pune, IndiaHQ checked Sep 18, 2026	5,001-10,000	7,141 contacts →
	Partial evidence “Suzlon is a global wind-first, full-stack clean energy solutions conglomerate with businesses spanning RE Technology (Wind, Solar, Storage), RE Development Company, RE Asset…” Source: RevenueBase Database · checked Sep 18, 2026
8	EDP	Indirect evidence	Lisbon, PortugalHQ checked Sep 18, 2026	10001+	6,435 contacts →
	Indirect evidence “Our story began 50 years ago.” Source: RevenueBase Database · checked Sep 18, 2026
9	Alfanar	Partial evidence	Riyadh, Saudi ArabiaHQ checked Sep 18, 2026	10001+	6,383 contacts →
	Partial evidence “alfanar builds efficient energy systems & solutions of the present and sets up infrastructures for a brighter future.” Source: RevenueBase Database · checked Sep 18, 2026
10	Enel Green Power	Partial evidence	Roma, ItalyHQ checked Sep 18, 2026	5,001-10,000	5,251 contacts →
	Partial evidence “We are the Enel Group company dedicated to the development and management of renewable energy generation worldwide.” Source: RevenueBase Database · checked Sep 18, 2026
11	RENEW	Partial evidence	Gurugram, IndiaHQ checked Sep 18, 2026	1,001-5,000	4,340 contacts →
	Partial 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 18, 2026
12	Octopus Energy	Strong evidence	London, United KingdomHQ checked Sep 18, 2026	1,001-5,000	3,989 contacts →
	Strong evidence “We're on a mission to make a big green dent in the universe by building a truly sustainable energy system globally.” Source: RevenueBase Database · checked Sep 18, 2026
13	KENTZ	Indirect evidence	Dubai, United Arab EmiratesHQ checked Sep 18, 2026	10001+	3,987 contacts →
	Indirect evidence “Following the acquisition of SNC-Lavalin's oil and gas division, Kentz has become a part of Kent.” Source: RevenueBase Database · checked Sep 18, 2026
14	RES	Partial evidence	Kings Langley, United KingdomHQ checked Sep 18, 2026	1,001-5,000	3,721 contacts →
	Partial evidence “RES is the world’s largest independent renewable energy company, working across 24 countries and active in wind, solar, energy storage, green hydrogen, transmission, and…” Source: RevenueBase Database · checked Sep 18, 2026
15	IDEX	Indirect evidence	Boulogne-billancourt, FranceHQ checked Sep 18, 2026	5,001-10,000	3,353 contacts →
	Indirect evidence “Fondé en France en 1963, le groupe IDEX, fort de près de 6 500 collaborateurs, développe, conçoit, finance, construit et exploite des infrastructures énergétiques locales et…” Source: RevenueBase Database · checked Sep 18, 2026
16	ENPAL	Partial evidence	Berlin, GermanyHQ checked Sep 18, 2026	5,001-10,000	3,242 contacts →
	Partial evidence “Enpal is Europe's leading new energy company.” Source: RevenueBase Database · checked Sep 18, 2026
17	FTI	Partial evidence	Menasha, WI, United StatesHQ checked Sep 18, 2026	1,001-5,000	2,741 contacts →
	Partial evidence “Faith Technologies Incorporated (FTI) is a dynamic organization comprised of construction, engineering, manufacturing and renewable energy experts.” Source: RevenueBase Database · checked Sep 18, 2026
18	Tata Power Renewable Energy Limited	Strong evidence	Mumbai, IndiaHQ checked Sep 18, 2026	501-1,000	2,660 contacts →
	Strong evidence “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…” Source: RevenueBase Database · checked Sep 18, 2026
19	ENAP	Partial evidence	Las Condes, ChileHQ checked Sep 18, 2026	1,001-5,000	2,630 contacts →
	Partial evidence “Diariamente nos mueve crear más y mejores fuentes de energía para el desarrollo de los países y las futuras generaciones.” Source: RevenueBase Database · checked Sep 18, 2026
20	Greenko Group	Partial evidence	Hyderabad, IndiaHQ checked Sep 18, 2026	1,001-5,000	2,578 contacts →
	Partial evidence “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…” Source: RevenueBase Database · checked Sep 18, 2026
21	Waaree Group	Partial evidence	Mumbai, IndiaHQ checked Sep 18, 2026	5,001-10,000	2,264 contacts →
	Partial evidence “Founded in 1990, Waaree Energies Limited is India’s leading renewable energy company, driving the global transition to clean power.” Source: RevenueBase Database · checked Sep 18, 2026
22	Acme Group	Strong evidence	Gurgaon, IndiaHQ checked Sep 18, 2026	1,001-5,000	2,242 contacts →
	Strong evidence “ACME Group is one of the leading global sustainable and renewable energy companies and a beacon of innovation in the sustainable energy landscape for the past 2 decades.” Source: RevenueBase Database · checked Sep 18, 2026
23	Mckinstry	Partial evidence	Seattle, WA, United StatesHQ checked Sep 18, 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 18, 2026
24	Axpo Group	Strong evidence	Baden, ItalyHQ checked Sep 18, 2026	5,001-10,000	2,156 contacts →
	Strong evidence “Axpo is driven by a single purpose – to enable a sustainable future through innovative energy solutions.” Source: RevenueBase Database · checked Sep 18, 2026
25	SSE Renewables	Strong evidence	Perth, United KingdomHQ checked Sep 18, 2026	1,001-5,000	1,900 contacts →
	Strong evidence “SSE Renewables is a leading developer and operator of renewable energy generation, headquartered in the UK and Ireland, with a growing presence internationally.” Source: RevenueBase Database · checked Sep 18, 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: sustainable energy developers. 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 sustainable energy developers.
Partial evidence: Its own public description names part of sustainable energy developers, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name sustainable energy developers. 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 21,908 sustainable energy developers worldwide

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Sustainable energy developers worldwide at a glance

As of Sep 18, 2026

27.3%Verified-email coverage

23.8Average contacts per company

11-50Median size (employees)

1.4%Largest-city concentration · London

Sep 18, 2026Page data refreshed

Companies by employee count

1-10

9,642

11-50

8,504

51-200

2,608

201-500

652

501-1,000

221

1,001-5,000

140

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 sustainable energy developers, 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: 55 countries, largest first: the United States, India, Brazil, the United Kingdom, Germany, Italy, Spain, Australia, France, Türkiye and 45 more. Country and city lists for sustainable energy developers are linked below.
What qualifies: Companies worldwide whose own description of what they do matches “sustainable energy developers”. 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 sustainable energy developers), 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 sustainable energy developers, 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, 142,338 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 18, 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.

Sustainable energy developers by location

117 lists · largest first

Every Sustainable energy developers 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 sustainable energy developers, 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 sustainable energy developers are there worldwide?

RevenueBase identified 21,908 sustainable energy developers 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?

Vestas, headquartered in Aarhus, tops this list with the largest team on record.

Which country has the most sustainable energy developers?

The United States leads with 2,985 companies, followed by India (2,213) and Brazil (2,075). Every sustainable energy developers list by country and city is linked on this page.

Which city has the most sustainable energy developers?

London leads with 298 headquartered companies, followed by Madrid (184) and Lahore (173).

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 142,338 verified decision-maker contacts tracked across these 21,908 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 18, 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 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.