Company lists · Data refreshed October 2026

Top 25 Green energy startups worldwide

Name: Green energy startups worldwide
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Oct 13, 2026 33,056 companies tracked

RevenueBase identified 33,056 company matches for green energy startups worldwide as of October 2026 and tracks 863,080 professional contacts across them, including 244,325 with verified work emails. The United States is the largest market and London the largest hub.

This list covers company matches for green energy startups 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 October 13, 2026. Country and city lists for green energy startups 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 Oct 13, 2026 How this list was built

33,056Companies

863,080Contacts tracked

244,325Verified emails

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The 25 largest green energy startups worldwide

Ranked by team size

Top 25 of 33,056 company matches for green energy startups worldwide, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Oct 13, 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	Siemens Energy	Exact match	Munich, GermanyHQ recorded Oct 13, 2026	10001+	50,660 contacts →
	Exact match “Siemens Energy is one of the world’s leading energy technology companies.” Recorded in the RevenueBase company graph · Oct 13, 2026 · View company records in RevenueBase
2	EDF	Exact match	Paris, FranceHQ recorded Oct 13, 2026	10001+	46,771 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 · Oct 13, 2026 · View company records in RevenueBase
3	GE Vernova	Exact match	Boston, MA, United StatesHQ recorded Oct 13, 2026	10001+	34,212 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 · Oct 13, 2026 · View company records in RevenueBase
4	Acciona	Exact match	Madrid, SpainHQ recorded Oct 13, 2026	10001+	28,930 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 · Oct 13, 2026 · View company records in RevenueBase
5	Vestas	Exact match	Aarhus, DenmarkHQ recorded Oct 13, 2026	10001+	27,666 contacts →
	Exact match “Vestas is the energy industry’s global partner on sustainable energy solutions.” Recorded in the RevenueBase company graph · Oct 13, 2026 · View company records in RevenueBase
6	Siemens Gamesa	Exact match	Zamudio, SpainHQ recorded Oct 13, 2026	10001+	18,116 contacts →
	Exact match “Siemens Gamesa is a global technology leader in the renewable energy industry - specifically in the development, manufacturing, installation and maintenance of wind turbines.” Recorded in the RevenueBase company graph · Oct 13, 2026 · View company records in RevenueBase
7	RWE	Exact match	Essen, GermanyHQ recorded Oct 13, 2026	10001+	11,410 contacts →
	Exact match “RWE is leading the way to a modern energy world.” Recorded in the RevenueBase company graph · Oct 13, 2026 · View company records in RevenueBase
8	TRANE	Exact match	Davidson, NC, United StatesHQ recorded Oct 13, 2026	10001+	10,624 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 · Oct 13, 2026 · View company records in RevenueBase
9	Carrier Hvac	Exact match	United StatesHQ recorded Oct 13, 2026	10001+	10,247 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 · Oct 13, 2026 · View company records in RevenueBase
10	Tata Power	Exact match	Mumbai, IndiaHQ recorded Oct 13, 2026	10001+	9,453 contacts →
	Exact match “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.” Recorded in the RevenueBase company graph · Oct 13, 2026 · View company records in RevenueBase
11	Dalkia	Exact match	Saint-andré-lez-lille, FranceHQ recorded Oct 13, 2026	10001+	8,823 contacts →
	Exact match “Dalkia : ensemble, relevons le défi climatique!” Recorded in the RevenueBase company graph · Oct 13, 2026 · View company records in RevenueBase
12	Sunrun	Exact match	San Francisco, CA, United StatesHQ recorded Oct 13, 2026	10001+	7,991 contacts →
	Exact match “Life runs on clean energy.” Recorded in the RevenueBase company graph · Oct 13, 2026 · View company records in RevenueBase
13	Iberdrola	Exact match	Bilbao, SpainHQ recorded Oct 13, 2026	10001+	7,920 contacts →
	Exact match “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…” Recorded in the RevenueBase company graph · Oct 13, 2026 · View company records in RevenueBase
14	Ørsted	Exact match	Fredericia, United StatesHQ recorded Oct 13, 2026	5,001-10,000	7,263 contacts →
	Exact match “Ørsted is the global leader in offshore wind power and is one of the largest renewable energy companies in the world.” Recorded in the RevenueBase company graph · Oct 13, 2026 · View company records in RevenueBase
15	Suzlon Group	Exact match	Pune, IndiaHQ recorded Oct 13, 2026	5,001-10,000	7,174 contacts →
	Exact match “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…” Recorded in the RevenueBase company graph · Oct 13, 2026 · View company records in RevenueBase
16	Nordex Group	Exact match	Hamburg, GermanyHQ recorded Oct 13, 2026	10001+	7,068 contacts →
	Exact match “The development, manufacture, project management and servicing of wind turbines in the onshore segment has been the core competence and passion of the Nordex Group and its more…” Recorded in the RevenueBase company graph · Oct 13, 2026 · View company records in RevenueBase
17	EDP	Exact match	Lisbon, PortugalHQ recorded Oct 13, 2026	10001+	6,633 contacts →
	Exact match “Our story began 50 years ago.” Recorded in the RevenueBase company graph · Oct 13, 2026 · View company records in RevenueBase
18	Alfanar	Exact match	Riyadh, Saudi ArabiaHQ recorded Oct 13, 2026	10001+	6,606 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 · Oct 13, 2026 · View company records in RevenueBase
19	GALP	Exact match	Alcântara, PortugalHQ recorded Oct 13, 2026	5,001-10,000	5,171 contacts →
	Exact match “Galp is an energy company committed to the development of efficient solutions in its operations and in the integrated services it offers to customers.” Recorded in the RevenueBase company graph · Oct 13, 2026 · View company records in RevenueBase
20	Enel Green Power	Exact match	Rome, ItalyHQ recorded Oct 13, 2026	5,001-10,000	4,769 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 · Oct 13, 2026 · View company records in RevenueBase
21	ATVOS	Exact match	São Paulo, BrazilHQ recorded Oct 13, 2026	10001+	4,751 contacts →
	Exact match “Estamos juntos pelo propósito de liderar a transição energético para mover o mundo e transformar vidas.” Recorded in the RevenueBase company graph · Oct 13, 2026 · View company records in RevenueBase
22	RENEW	Exact match	Gurgaon, IndiaHQ recorded Oct 13, 2026	1,001-5,000	4,430 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 · Oct 13, 2026 · View company records in RevenueBase
23	Octopus Energy	Exact match	London, United KingdomHQ recorded Oct 13, 2026	1,001-5,000	4,318 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 · Oct 13, 2026 · View company records in RevenueBase
24	Statkraft	Exact match	Oslo, NorwayHQ recorded Oct 13, 2026	5,001-10,000	4,137 contacts →
	Exact match “Statkraft is a leading company in hydropower internationally and Europe’s largest generator of renewable energy.” Recorded in the RevenueBase company graph · Oct 13, 2026 · View company records in RevenueBase
25	Generac	Exact match	Waukesha, WI, United StatesHQ recorded Oct 13, 2026	5,001-10,000	3,918 contacts →
	Exact match “Generac is the total energy solutions company powering a smarter world.” Recorded in the RevenueBase company graph · Oct 13, 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 “green energy startups”. 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 33,056 green energy startups worldwide

See the full list, filter by size, metro and specialty, and access 244,325 tracked professional contacts with verified work emails. Direct dials are available where recorded.

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Green energy startups worldwide at a glance

As of Oct 13, 2026

28.3%Verified-email coverage

26.1Average contacts per company

11-50Median size (employees)

0.8%Largest-city concentration · London

Oct 13, 2026Page data refreshed

Companies by employee count

1-10

14,988

11-50

12,287

51-200

3,787

201-500

1,023

501-1,000

391

1,001-5,000

297

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 green energy startups are linked below.
What qualifies: Company records worldwide whose business descriptions match “green energy startups” 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 244,325 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 October 13, 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.

Green energy startups by location

142 lists · largest first

Every Green energy startups 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 “green energy startups”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many green energy startups are there worldwide?

RevenueBase identified 33,056 company matches for green energy startups worldwide as of October 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?

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

Which country has the most green energy startups?

The United States leads with 3,124 companies, followed by India (2,685) and Brazil (2,529). Every green energy startups list by country and city is linked on this page.

Which city has the most green energy startups?

London leads with 278 company records, followed by Sao Paulo (219) and Lahore (217).

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 244,325 professional contacts with verified work emails tracked across these 33,056 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 October 13, 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.