Company lists · Data refreshed November 2026

Top 25 Clean energy startups worldwide

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

Compiled by the RevenueBase Data Team Data refreshed Nov 6, 2026 19,683 companies tracked

RevenueBase identified 19,683 company matches for clean energy startups worldwide as of November 2026 and tracks 901,826 professional contacts across them, including 307,075 with verified work emails. The United States is the largest market and London the largest hub.

This list covers company matches for clean 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 November 6, 2026. Country and city lists for clean 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 Nov 6, 2026 How this list was built

19,683Companies

901,826Contacts tracked

307,075Verified emails

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The 25 largest clean energy startups worldwide

Ranked by team size

Top 25 of 19,683 company matches for clean energy startups worldwide, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Nov 6, 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	TESLA	Exact match	Austin, CA, United StatesHQ recorded Nov 6, 2026	10001+	74,474 contacts →
	Exact match “Tesla is accelerating the world’s transition to sustainable abundance.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
2	Siemens Energy	Exact match	Munich, GermanyHQ recorded Nov 6, 2026	10001+	52,798 contacts →
	Exact match “Siemens Energy is one of the world’s leading energy technology companies.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
3	EDF	Exact match	Paris, FranceHQ recorded Nov 6, 2026	10001+	48,321 contacts →
	Exact match “Parce qu’elle est décarbonée, en plus d’être compétitive et souveraine, l’électricité répond aux défis climatiques d’aujourd’hui et de demain.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
4	GE Vernova	Exact match	Boston, MA, United StatesHQ recorded Nov 6, 2026	10001+	35,518 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 · Nov 6, 2026 · View company records in RevenueBase
5	Acciona	Exact match	Madrid, SpainHQ recorded Nov 6, 2026	10001+	29,815 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 · Nov 6, 2026 · View company records in RevenueBase
6	Repsol	Exact match	Madrid, TX, GermanyHQ recorded Nov 6, 2026	10001+	21,959 contacts →
	Exact match “What do you do with the energy that drives you every day?” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
7	Technipfmc	Exact match	Newcastle Upon Tyne, United KingdomHQ recorded Nov 6, 2026	10001+	21,287 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 · Nov 6, 2026 · View company records in RevenueBase
8	Siemens Gamesa	Exact match	Zamudio, SpainHQ recorded Nov 6, 2026	10001+	18,444 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 · Nov 6, 2026 · View company records in RevenueBase
9	Subsea7	Exact match	London, United KingdomHQ recorded Nov 6, 2026	10001+	13,467 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 · Nov 6, 2026 · View company records in RevenueBase
10	RWE	Exact match	Essen, GermanyHQ recorded Nov 6, 2026	10001+	11,702 contacts →
	Exact match “RWE is leading the way to a modern energy world.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
11	TRANE	Exact match	Davidson, NC, United StatesHQ recorded Nov 6, 2026	10001+	10,940 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 · Nov 6, 2026 · View company records in RevenueBase
12	Carrier Hvac	Exact match	United StatesHQ recorded Nov 6, 2026	10001+	10,403 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 · Nov 6, 2026 · View company records in RevenueBase
13	Tata Power	Exact match	Mumbai, IndiaHQ recorded Nov 6, 2026	10001+	9,891 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 · Nov 6, 2026 · View company records in RevenueBase
14	Sunrun	Exact match	San Francisco, CA, United StatesHQ recorded Nov 6, 2026	10001+	8,270 contacts →
	Exact match “Life runs on clean energy.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
15	Ørsted	Exact match	Fredericia, United StatesHQ recorded Nov 6, 2026	5,001-10,000	7,417 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 · Nov 6, 2026 · View company records in RevenueBase
16	Alfanar	Exact match	Riyadh, Saudi ArabiaHQ recorded Nov 6, 2026	10001+	6,979 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 · Nov 6, 2026 · View company records in RevenueBase
17	EDP	Exact match	Lisbon, PortugalHQ recorded Nov 6, 2026	10001+	6,737 contacts →
	Exact match “Our story began 50 years ago.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
18	Nextera Energy Resources	Exact match	Juno Beach, FL, United StatesHQ recorded Nov 6, 2026	10001+	6,545 contacts →
	Exact match “NextEra Energy Resources, LLC, together with its affiliated entities,("NextEra Energy Resources") is one of the largest energy infrastructure companies in North America.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
19	The AES Corporation	Exact match	Arlington, VA, United StatesHQ recorded Nov 6, 2026	5,001-10,000	5,629 contacts →
	Exact match “The world no longer thinks of energy as a matter of supply and demand.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
20	Enel Green Power	Exact match	Rome, ItalyHQ recorded Nov 6, 2026	5,001-10,000	5,313 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 · Nov 6, 2026 · View company records in RevenueBase
21	GALP	Exact match	Alcântara, PortugalHQ recorded Nov 6, 2026	5,001-10,000	5,261 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 · Nov 6, 2026 · View company records in RevenueBase
22	ATVOS	Exact match	São Paulo, BrazilHQ recorded Nov 6, 2026	10001+	4,903 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 · Nov 6, 2026 · View company records in RevenueBase
23	RENEW	Exact match	Gurgaon, IndiaHQ recorded Nov 6, 2026	1,001-5,000	4,690 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 · Nov 6, 2026 · View company records in RevenueBase
24	Octopus Energy	Exact match	London, United KingdomHQ recorded Nov 6, 2026	1,001-5,000	4,472 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 · Nov 6, 2026 · View company records in RevenueBase
25	Generac	Exact match	Waukesha, WI, United StatesHQ recorded Nov 6, 2026	5,001-10,000	4,041 contacts →
	Exact match “Generac is the total energy solutions company powering a smarter world.” Recorded in the RevenueBase company graph · Nov 6, 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 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 19,683 clean energy startups worldwide

See the full list, filter by size, metro and specialty, and access 307,075 tracked professional contacts with verified work emails. Direct dials are available where recorded.

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Clean energy startups worldwide at a glance

As of Nov 6, 2026

34.1%Verified-email coverage

45.8Average contacts per company

11-50Median size (employees)

1.5%Largest-city concentration · London

Nov 6, 2026Page data refreshed

Companies by employee count

1-10

8,652

11-50

6,976

51-200

2,449

201-500

732

501-1,000

333

1,001-5,000

276

5,001-10,000

10001+

108

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 energy startups are linked below.
What qualifies: Company records worldwide whose business descriptions match “clean 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 307,075 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 November 6, 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 energy startups by location

114 lists · largest first

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

How many clean energy startups are there worldwide?

RevenueBase identified 19,683 company matches for clean energy startups worldwide as of November 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?

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

Which country has the most clean energy startups?

The United States leads with 2,725 companies, followed by India (1,486) and Brazil (1,229). Every clean energy startups list by country and city is linked on this page.

Which city has the most clean energy startups?

London leads with 298 company records, followed by Madrid (154) and Sao Paulo (150).

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 307,075 professional contacts with verified work emails tracked across these 19,683 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 November 6, 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.