Company lists · Data refreshed September 2026
Top 25 Carbon-free energy providers worldwide
RevenueBase identified 7,500 carbon-free energy providers worldwide as of September 2026 and tracks 406,784 professional contacts across them, including 131,620 with verified work emails and 0 with mobile numbers. The United States is the largest market and Sao Paulo the largest hub.
This list covers carbon-free energy providers 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 16, 2026. Country and city lists for carbon-free energy providers 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.
The 25 largest carbon-free energy providers worldwide
Ranked by team size| # | Company | Contacts | |||
|---|---|---|---|---|---|
| 1 | 44,842 contacts → | ||||
Partial evidence “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.” Source: RevenueBase Database · checked Sep 16, 2026Thanks. The Data Team will review it. | |||||
| 2 | 31,976 contacts → | ||||
Partial evidence “Dominion Energy (NYSE: D), headquartered in Richmond, Va, provides regulated electricity service to 3.6 million homes and businesses in Virginia, North Carolina, and South…” Source: RevenueBase Database · checked Sep 16, 2026Thanks. The Data Team will review it. | |||||
| 3 | 15,504 contacts → | ||||
Indirect evidence “What if your next career adventure started with ENGIE?” Source: RevenueBase Database · checked Sep 16, 2026Thanks. The Data Team will review it. | |||||
| 4 | 11,181 contacts → | ||||
Partial evidence “RWE is leading the way to a modern energy world.” Source: RevenueBase Database · checked Sep 16, 2026Thanks. The Data Team will review it. | |||||
| 5 | 9,458 contacts → | ||||
Strong evidence “Constellation Energy Corporation (Nasdaq: CEG), a Fortune 200 company headquartered in Baltimore, is the nation’s largest producer of reliable, emissions-free energy and a leading…” Source: RevenueBase Database · checked Sep 16, 2026Thanks. The Data Team will review it. | |||||
| 6 | 9,414 contacts → | ||||
Indirect evidence “Tata Power is one of India’s largest integrated power companies and together with its subsidiaries and jointly controlled entities, has an installed/managed capacity of 14,294 MW.” Source: RevenueBase Database · checked Sep 16, 2026Thanks. The Data Team will review it. | |||||
| 7 | 8,955 contacts → | ||||
Indirect evidence “At Ontario Power Generation (OPG), our power is changing the world as we strive to electrify life in one generation.” Source: RevenueBase Database · checked Sep 16, 2026Thanks. The Data Team will review it. | |||||
| 8 | 8,188 contacts → | ||||
Partial evidence “EDF is leading the charge towards An Electric Britain to help make energy more affordable and sustainable.” Source: RevenueBase Database · checked Sep 16, 2026Thanks. The Data Team will review it. | |||||
| 9 | 7,974 contacts → | ||||
Partial evidence “Life runs on clean energy.” Source: RevenueBase Database · checked Sep 16, 2026Thanks. The Data Team will review it. | |||||
| 10 | 7,598 contacts → | ||||
Partial evidence “With more than 180 years of history, Iberdrola is today a global energy leader, the leading wind power producer and one of the largest electricity companies in the world in terms…” Source: RevenueBase Database · checked Sep 16, 2026Thanks. The Data Team will review it. | |||||
| 11 | 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 16, 2026Thanks. The Data Team will review it. | |||||
| 12 | 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 16, 2026Thanks. The Data Team will review it. | |||||
| 13 | 6,435 contacts → | ||||
Indirect evidence “Our story began 50 years ago.” Source: RevenueBase Database · checked Sep 16, 2026Thanks. The Data Team will review it. | |||||
| 14 | 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 16, 2026Thanks. The Data Team will review it. | |||||
| 15 | 5,036 contacts → | ||||
Indirect evidence “High reliability, low prices and high customer satisfaction are cornerstones of our customer commitment, but it doesn't end there.” Source: RevenueBase Database · checked Sep 16, 2026Thanks. The Data Team will review it. | |||||
| 16 | 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 16, 2026Thanks. The Data Team will review it. | |||||
| 17 | 4,161 contacts → | ||||
Partial evidence “Statkraft is a leading company in hydropower internationally and Europe’s largest generator of renewable energy.” Source: RevenueBase Database · checked Sep 16, 2026Thanks. The Data Team will review it. | |||||
| 18 | 3,989 contacts → | ||||
Partial 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 16, 2026Thanks. The Data Team will review it. | |||||
| 19 | 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 16, 2026Thanks. The Data Team will review it. | |||||
| 20 | 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 16, 2026Thanks. The Data Team will review it. | |||||
| 21 | 2,660 contacts → | ||||
Partial 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 16, 2026Thanks. The Data Team will review it. | |||||
| 22 | 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 16, 2026Thanks. The Data Team will review it. | |||||
| 23 | 2,466 contacts → | ||||
Indirect evidence “Vistra (NYSE: VST) is a leading Fortune 500 integrated retail electricity and power generation company, based in Irving, Texas, that provides essential resources to customers…” Source: RevenueBase Database · checked Sep 16, 2026Thanks. The Data Team will review it. | |||||
| 24 | 2,156 contacts → | ||||
Partial evidence “Axpo is driven by a single purpose – to enable a sustainable future through innovative energy solutions.” Source: RevenueBase Database · checked Sep 16, 2026Thanks. The Data Team will review it. | |||||
| 25 | 2,112 contacts → | ||||
Indirect evidence “A business unit of Constellation (NASDAQ: CEG), Calpine Corporation is America’s largest generator of electricity from natural gas and geothermal resources with operations in…” Source: RevenueBase Database · checked Sep 16, 2026Thanks. The Data Team will review it. | |||||
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: carbon-free energy providers. 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 carbon-free energy providers.
- Partial evidence
- Its own public description names part of carbon-free energy providers, so it works in or next to the category without describing itself that way.
- Indirect evidence
- The description shown does not name carbon-free energy providers. 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 7,500 carbon-free energy providers worldwide
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Carbon-free energy providers worldwide at a glance
As of Sep 16, 2026Companies by employee count
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 carbon-free energy providers, 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
- 36 countries, largest first: the United States, Brazil, India, the United Kingdom, Germany, Spain, Australia, Italy, France, Pakistan and 26 more. Country and city lists for carbon-free energy providers are linked below.
- What qualifies
- Companies worldwide whose own description of what they do matches “carbon-free energy providers”. 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 carbon-free energy providers), 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 carbon-free energy providers, 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, 131,620 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 16, 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.
Carbon-free energy providers by location
43 lists · largest firstEvery Carbon-free energy providers list RevenueBase publishes, by country and city. Counts are matching companies in each list as of its own refresh date.
Countries
- Carbon-free energy providers based in the United States1,237
- Carbon-free energy providers based in Brazil915
- Carbon-free energy providers based in India765
- Carbon-free energy providers based in the United Kingdom486
- Carbon-free energy providers based in Germany473
- Carbon-free energy providers based in Spain365
- Carbon-free energy providers based in Australia348
- Carbon-free energy providers based in Italy344
- Carbon-free energy providers based in France253
- Carbon-free energy providers based in Pakistan237
- Carbon-free energy providers based in South Africa199
- Carbon-free energy providers based in the Netherlands189
- Carbon-free energy providers based in Türkiye185
- Carbon-free energy providers based in Canada155
- Carbon-free energy providers based in Nigeria140
- Carbon-free energy providers based in Mexico137
- Carbon-free energy providers based in Poland135
- Carbon-free energy providers based in Belgium97
- Carbon-free energy providers based in Switzerland87
- Carbon-free energy providers based in Sweden65
- Carbon-free energy providers based in Ireland60
- Carbon-free energy providers based in Portugal60
- Carbon-free energy providers based in Argentina56
- Carbon-free energy providers based in the Philippines52
- Carbon-free energy providers based in Austria48
- Carbon-free energy providers based in Chile47
- Carbon-free energy providers based in Japan46
- Carbon-free energy providers based in Denmark40
- Carbon-free energy providers based in Czechia37
- Carbon-free energy providers based in the United Arab Emirates37
- Carbon-free energy providers based in Norway36
- Carbon-free energy providers based in Greece35
- Carbon-free energy providers based in Hungary35
- Carbon-free energy providers based in Malaysia35
- Carbon-free energy providers based in Romania33
- Carbon-free energy providers based in New Zealand31
Cities
- Carbon-free energy providers based in Sao Paulo, Brazil81
- Carbon-free energy providers based in Belo Horizonte, Brazil40
- Carbon-free energy providers based in Ahmedabad, India38
- Carbon-free energy providers based in Mumbai, India36
- Carbon-free energy providers based in Fortaleza, Brazil34
- Carbon-free energy providers based in New Delhi, India32
- Carbon-free energy providers based in Curitiba, Brazil27
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 carbon-free energy providers, 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 carbon-free energy providers are there worldwide?
RevenueBase identified 7,500 carbon-free energy providers 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?
EDF, headquartered in Paris, tops this list with the largest team on record.
Which country has the most carbon-free energy providers?
The United States leads with 1,237 companies, followed by Brazil (915) and India (765). Every carbon-free energy providers list by country and city is linked on this page.
Which city has the most carbon-free energy providers?
Sao Paulo leads with 81 headquartered companies, followed by Lahore (79) and London (78).
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 131,620 verified decision-maker contacts tracked across these 7,500 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 16, 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.