Company lists · Data refreshed November 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 Nov 6, 2026 11,518 companies tracked

RevenueBase identified 11,518 company matches for cleantech and green energy startups worldwide as of November 2026 and tracks 222,490 professional contacts across them, including 65,066 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 November 6, 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 Nov 6, 2026 How this list was built

11,518Companies

222,490Contacts tracked

65,066Verified emails

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The 25 largest cleantech and green energy startups worldwide

Ranked by team size

Top 25 of 11,518 company matches for cleantech and green 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	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
2	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
3	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
4	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
5	RES	Exact match	Kings Langley, United KingdomHQ recorded Nov 6, 2026	1,001-5,000	3,964 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 · Nov 6, 2026 · View company records in RevenueBase
6	IDEX	Exact match	Boulogne-billancourt, FranceHQ recorded Nov 6, 2026	5,001-10,000	3,530 contacts →
	Exact match “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…” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
7	ENPAL	Exact match	Berlin, GermanyHQ recorded Nov 6, 2026	5,001-10,000	3,483 contacts →
	Exact match “Enpal is Europe's leading new energy company.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
8	Tata Power Renewable Energy Limited	Exact match	Mumbai, IndiaHQ recorded Nov 6, 2026	501-1,000	2,799 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 · Nov 6, 2026 · View company records in RevenueBase
9	Greenko Group	Exact match	Hyderabad, IndiaHQ recorded Nov 6, 2026	1,001-5,000	2,737 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 · Nov 6, 2026 · View company records in RevenueBase
10	Acme Group	Exact match	Gurgaon, IndiaHQ recorded Nov 6, 2026	1,001-5,000	2,501 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 · Nov 6, 2026 · View company records in RevenueBase
11	Envision Energy	Exact match	Huangpu District, ChinaHQ recorded Nov 6, 2026	1,001-5,000	2,311 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 · Nov 6, 2026 · View company records in RevenueBase
12	Avaada Group	Exact match	Mumbai, IndiaHQ recorded Nov 6, 2026	5,001-10,000	1,956 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 · Nov 6, 2026 · View company records in RevenueBase
13	Trinity Solar	Exact match	Wall Township, NJ, United StatesHQ recorded Nov 6, 2026	1,001-5,000	1,854 contacts →
	Exact match “Trinity Solar is one of the largest privately held residential solar companies in the nation.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
14	SAEL	Exact match	New Delhi, IndiaHQ recorded Nov 6, 2026	1,001-5,000	1,329 contacts →
	Exact match “SAEL Industries Limited, is a leading Indian renewable energy company specializing in solar and waste-to-energy projects, committed to fostering green assets that contribute to…” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
15	Voltalia	Exact match	Paris, FranceHQ recorded Nov 6, 2026	1,001-5,000	1,327 contacts →
	Exact match “Voltalia is an international player in renewable energies.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
16	Scatec ASA	Exact match	Oslo, NorwayHQ recorded Nov 6, 2026	501-1,000	1,259 contacts →
	Exact match “Scatec is a leading renewable energy solutions provider, accelerating access to reliable and affordable clean energy in emerging markets.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
17	Masdar ABU Dhabi Future Energy Company	Exact match	Abu Dhabi, United Arab EmiratesHQ recorded Nov 6, 2026	501-1,000	1,113 contacts →
	Exact match “Established in 2006, Masdar is a global clean energy leader, transforming how the world produces and consumes energy through bold innovation and commercial excellence.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
18	CTG Brasil	Exact match	Sao Paulo, BrazilHQ recorded Nov 6, 2026	501-1,000	1,060 contacts →
	Exact match “Na CTG Brasil, trabalhamos por um único propósito: desenvolver o mundo com energia limpa em larga escala.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
19	Wärtsilä Energy	Exact match	Helsinki, FinlandHQ recorded Nov 6, 2026	10001+	991 contacts →
	Exact match “Wärtsilä leads the transition towards a 100% renewable energy future.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
20	Cleanmax	Exact match	Mumbai, IndiaHQ recorded Nov 6, 2026	201-500	852 contacts →
	Exact match “CleanMax is India's largest C&I renewable energy provider with total contracted capacity 6.8 GW, helping corporates and businesses go Net-Zero through customisable, tailored…” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
21	Resource Innovations	Exact match	Half Moon Bay, OR, United StatesHQ recorded Nov 6, 2026	501-1,000	793 contacts →
	Exact match “Resource Innovations (RI) is an energy transformation firm.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
22	NWG S.P.A	Exact match	Prato, ItalyHQ recorded Nov 6, 2026	n/a	792 contacts →
	Exact match “Nata a Prato nel 2003 è oggi una delle più importanti realtà nel mercato della Green Economy.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
23	ABO Energy	Exact match	Wiesbaden, GermanyHQ recorded Nov 6, 2026	1,001-5,000	789 contacts →
	Exact match “Founded in 1996, ABO Energy (fomerly known as ABO Wind) is among Europe’s leading developers of renewable energy projects.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
24	Sunnova Energy	Exact match	Houston, TX, United StatesHQ recorded Nov 6, 2026	501-1,000	784 contacts →
	Exact match “Sunnova Energy International Inc.(NYSE: NOVA) is an industry-leading energy services company focused on making clean energy more accessible, reliable, and affordable for…” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
25	Juwi Group	Exact match	Wörrstadt, GermanyHQ recorded Nov 6, 2026	1,001-5,000	767 contacts →
	Exact match “For 30 years, we have been one of the leading specialists in renewable energies, offering complete project development and other services related to the planning, construction…” 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 “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 11,518 cleantech and green energy startups worldwide

See the full list, filter by size, metro and specialty, and access 65,066 tracked professional contacts with verified work emails. Direct dials are available where recorded.

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Cleantech and green energy startups worldwide at a glance

As of Nov 6, 2026

29.2%Verified-email coverage

19.3Average contacts per company

11-50Median size (employees)

1.3%Largest-city concentration · London

Nov 6, 2026Page data refreshed

Companies by employee count

1-10

5,298

11-50

4,260

51-200

1,329

201-500

339

501-1,000

108

1,001-5,000

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 65,066 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.

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 11,518 company matches for cleantech and green 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?

Ørsted 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 1,668 companies, followed by India (1,155) and Brazil (829). 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 147 company records, followed by Lahore (84) and Sao Paulo (83).

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 65,066 professional contacts with verified work emails tracked across these 11,518 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.