Company lists · Data refreshed October 2026

Top 25 Cleantech and green energy startups worldwide

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

Compiled by the RevenueBase Data Team Data refreshed Oct 9, 2026 17,595 companies tracked

RevenueBase identified 17,595 company matches for cleantech and green energy startups worldwide as of October 2026 and tracks 355,545 professional contacts across them, including 91,256 with verified work emails. The United States is the largest market and London the largest hub.

This list covers company matches for cleantech and 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 9, 2026. Country and city lists for cleantech and 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 9, 2026 How this list was built

17,595Companies

355,545Contacts tracked

91,256Verified emails

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

The 25 largest cleantech and green energy startups worldwide

Ranked by team size

Top 25 of 17,595 company matches for cleantech and green energy startups worldwide, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Oct 9, 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	Acciona	Exact match	Madrid, SpainHQ recorded Oct 9, 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 9, 2026 · View company records in RevenueBase
2	Siemens Gamesa	Exact match	Zamudio, SpainHQ recorded Oct 9, 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 9, 2026 · View company records in RevenueBase
3	Sunrun	Exact match	San Francisco, CA, United StatesHQ recorded Oct 9, 2026	10001+	7,991 contacts →
	Exact match “Life runs on clean energy.” Recorded in the RevenueBase company graph · Oct 9, 2026 · View company records in RevenueBase
4	Ørsted	Exact match	Fredericia, United StatesHQ recorded Oct 9, 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 9, 2026 · View company records in RevenueBase
5	Suzlon Group	Exact match	Pune, IndiaHQ recorded Oct 9, 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 9, 2026 · View company records in RevenueBase
6	EDP	Exact match	Lisbon, PortugalHQ recorded Oct 9, 2026	10001+	6,633 contacts →
	Exact match “Our story began 50 years ago.” Recorded in the RevenueBase company graph · Oct 9, 2026 · View company records in RevenueBase
7	Alfanar	Exact match	Riyadh, Saudi ArabiaHQ recorded Oct 9, 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 9, 2026 · View company records in RevenueBase
8	Enel Green Power	Exact match	Rome, ItalyHQ recorded Oct 9, 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 9, 2026 · View company records in RevenueBase
9	RENEW	Exact match	Gurgaon, IndiaHQ recorded Oct 9, 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 9, 2026 · View company records in RevenueBase
10	RES	Exact match	Kings Langley, United KingdomHQ recorded Oct 9, 2026	1,001-5,000	3,875 contacts →
	Exact match “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…” Recorded in the RevenueBase company graph · Oct 9, 2026 · View company records in RevenueBase
11	Luminous Power Technologies P LTD	Exact match	Gurgaon, IndiaHQ recorded Oct 9, 2026	5,001-10,000	3,788 contacts →
	Exact match “Powering Progress, Lighting Lives!” Recorded in the RevenueBase company graph · Oct 9, 2026 · View company records in RevenueBase
12	ENAP	Exact match	Las Condes, ChileHQ recorded Oct 9, 2026	1,001-5,000	2,816 contacts →
	Exact match “Diariamente nos mueve crear más y mejores fuentes de energía para el desarrollo de los países y las futuras generaciones.” Recorded in the RevenueBase company graph · Oct 9, 2026 · View company records in RevenueBase
13	Tata Power Renewable Energy Limited	Exact match	Mumbai, IndiaHQ recorded Oct 9, 2026	501-1,000	2,696 contacts →
	Exact match “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…” Recorded in the RevenueBase company graph · Oct 9, 2026 · View company records in RevenueBase
14	Adani Green Energy LTD	Exact match	United StatesHQ recorded Oct 9, 2026	1,001-5,000	2,637 contacts →
	Exact match “Adani Green Energy Limited (AGEL) is India’s largest renewable energy company playing a vital role in enabling the clean energy transition.” Recorded in the RevenueBase company graph · Oct 9, 2026 · View company records in RevenueBase
15	Greenko Group	Exact match	Hyderabad, IndiaHQ recorded Oct 9, 2026	1,001-5,000	2,621 contacts →
	Exact match “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…” Recorded in the RevenueBase company graph · Oct 9, 2026 · View company records in RevenueBase
16	Goldwind	Exact match	Daxing District, ChinaHQ recorded Oct 9, 2026	10001+	2,512 contacts →
	Exact match “As a reliable global strategic partner in clean energy, Goldwind is committed Driving a Renewable Future and centering its business on Ecology-Oriented Development+ENERGY industry…” Recorded in the RevenueBase company graph · Oct 9, 2026 · View company records in RevenueBase
17	Acme Group	Exact match	Gurgaon, IndiaHQ recorded Oct 9, 2026	1,001-5,000	2,348 contacts →
	Exact match “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.” Recorded in the RevenueBase company graph · Oct 9, 2026 · View company records in RevenueBase
18	Trinasolar	Exact match	Jiangsu, ChinaHQ recorded Oct 9, 2026	10001+	2,240 contacts →
	Exact match “Founded in 1997, Trinasolar (688599.” Recorded in the RevenueBase company graph · Oct 9, 2026 · View company records in RevenueBase
19	Waaree Group	Exact match	Mumbai, IndiaHQ recorded Oct 9, 2026	5,001-10,000	2,214 contacts →
	Exact match “Founded in 1990, Waaree Energies Limited is India’s leading renewable energy company, driving the global transition to clean power.” Recorded in the RevenueBase company graph · Oct 9, 2026 · View company records in RevenueBase
20	Envision Energy	Exact match	Huangpu District, ChinaHQ recorded Oct 9, 2026	1,001-5,000	2,204 contacts →
	Exact match “Envision Energy is a world-leading green technology company that provides renewable energy solutions for global enterprises, governments, and institutions.” Recorded in the RevenueBase company graph · Oct 9, 2026 · View company records in RevenueBase
21	Mitsubishi Power Americas	Exact match	Lake Mary, FL, United StatesHQ recorded Oct 9, 2026	1,001-5,000	1,984 contacts →
	Exact match “Mitsubishi Power Americas is creating a future that works for people and the planet through innovative power generation technology and solutions.” Recorded in the RevenueBase company graph · Oct 9, 2026 · View company records in RevenueBase
22	Avaada Group	Exact match	Mumbai, IndiaHQ recorded Oct 9, 2026	5,001-10,000	1,880 contacts →
	Exact match “Avaada Group is a diversified clean energy conglomerate focused on the global energy transition, providing solutions in renewable power generation, solar PV manufacturing, green…” Recorded in the RevenueBase company graph · Oct 9, 2026 · View company records in RevenueBase
23	Trinity Solar	Exact match	Wall Township, NJ, United StatesHQ recorded Oct 9, 2026	1,001-5,000	1,782 contacts →
	Exact match “Trinity Solar is one of the largest privately held residential solar companies in the nation.” Recorded in the RevenueBase company graph · Oct 9, 2026 · View company records in RevenueBase
24	Solv Energy	Exact match	San Diego, CA, United StatesHQ recorded Oct 9, 2026	1,001-5,000	1,437 contacts →
	Exact match “SOLV Energy is a renewable energy solutions provider for utility solar, energy storage, and high voltage projects in North America.” Recorded in the RevenueBase company graph · Oct 9, 2026 · View company records in RevenueBase
25	Voltalia	Exact match	Paris, FranceHQ recorded Oct 9, 2026	1,001-5,000	1,289 contacts →
	Exact match “Voltalia is an international player in renewable energies.” Recorded in the RevenueBase company graph · Oct 9, 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 “cleantech and 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 17,595 cleantech and green energy startups worldwide

See the full list, filter by size, metro and specialty, and access 91,256 tracked professional contacts with verified work emails. Direct dials are available where recorded.

Free signup · no credit card

View the full list →

Cleantech and green energy startups worldwide at a glance

As of Oct 9, 2026

25.7%Verified-email coverage

20.2Average contacts per company

11-50Median size (employees)

1.1%Largest-city concentration · London

Oct 9, 2026Page data refreshed

Companies by employee count

1-10

8,202

11-50

6,499

51-200

1,982

201-500

508

501-1,000

176

1,001-5,000

119

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 cleantech and green energy startups are linked below.
What qualifies: Company records worldwide whose business descriptions match “cleantech and 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 91,256 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 9, 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.

Cleantech and green energy startups by location

97 lists · largest first

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

How many cleantech and green energy startups are there worldwide?

RevenueBase identified 17,595 company matches for cleantech and 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?

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

Which country has the most cleantech and green energy startups?

The United States leads with 1,955 companies, followed by India (1,618) and Brazil (1,311). Every cleantech and green energy startups list by country and city is linked on this page.

Which city has the most cleantech and green energy startups?

London leads with 196 company records, followed by Lahore (123) and Sao Paulo (103).

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 91,256 professional contacts with verified work emails tracked across these 17,595 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 9, 2026.

Ready to reach these companies? Verified emails and direct dials for all 17,595 cleantech and green energy startups worldwide. Start with a free account, no credit card.

Download this list →

Related lists

Browse the directory

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.