Company lists · Data refreshed October 2026

Top 25 Clean energy nonprofits worldwide

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

Compiled by the RevenueBase Data Team Data refreshed Oct 9, 2026 7,178 companies tracked

RevenueBase identified 7,178 company matches for clean energy nonprofits worldwide as of October 2026 and tracks 97,659 professional contacts across them, including 27,519 with verified work emails. The United States is the largest market and London the largest hub.

This list covers company matches for clean energy nonprofits 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 clean energy nonprofits 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

7,178Companies

97,659Contacts tracked

27,519Verified emails

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

The 25 largest clean energy nonprofits worldwide

Ranked by team size

Top 25 of 7,178 company matches for clean energy nonprofits 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	SSE PLC	Exact match	Perth, United KingdomHQ recorded Oct 9, 2026	10001+	7,302 contacts →
	Exact match “The UK & Ireland's clean energy champion.” Recorded in the RevenueBase company graph · Oct 9, 2026 · View company records in RevenueBase
2	OVO	Exact match	Bristol, United KingdomHQ recorded Oct 9, 2026	5,001-10,000	2,773 contacts →
	Exact match “OVO Energy was founded in 2009 and redesigned the energy experience to be fair, effortless, green and simple for all customers.” Recorded in the RevenueBase company graph · Oct 9, 2026 · View company records in RevenueBase
3	Environmental Defense Fund	Exact match	New York, NY, United StatesHQ recorded Oct 9, 2026	1,001-5,000	1,403 contacts →
	Exact match “We are Environmental Defense Fund, a leading environmental nonprofit focused on stabilizing the climate while helping build strong and healthy communities.” Recorded in the RevenueBase company graph · Oct 9, 2026 · View company records in RevenueBase
4	Powur, PBC	Exact match	San Diego, United StatesHQ recorded Oct 9, 2026	n/a	1,097 contacts →
	Exact match “The Powur Mission: Accelerate the adoption of clean energy worldwide We're empowering our community of homeowners and advisors to thrive in the global shift to sustainable energy.” Recorded in the RevenueBase company graph · Oct 9, 2026 · View company records in RevenueBase
5	CTG Brasil	Exact match	Sao Paulo, BrazilHQ recorded Oct 9, 2026	501-1,000	1,043 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 · Oct 9, 2026 · View company records in RevenueBase
6	RMI	Exact match	Boulder, CO, United StatesHQ recorded Oct 9, 2026	501-1,000	864 contacts →
	Exact match “Rocky Mountain Institute (RMI) is an independent, nonpartisan nonprofit founded in 1982 that transforms global energy systems through market-driven solutions to secure a…” Recorded in the RevenueBase company graph · Oct 9, 2026 · View company records in RevenueBase
7	Community Dreams Foundation	Exact match	Orlando, FL, United StatesHQ recorded Oct 9, 2026	1,001-5,000	853 contacts →
	Exact match “We are a purpose-driven organization focused on empowering communities through clean energy, technology innovation, and collaborative partnerships.” Recorded in the RevenueBase company graph · Oct 9, 2026 · View company records in RevenueBase
8	Cleanmax	Exact match	Mumbai, IndiaHQ recorded Oct 9, 2026	201-500	809 contacts →
	Exact match “CleanMax is India’s largest commercial and industrial (“C&I”) renewable energy provider with 3 GW of operational, owned and managed capacity.” Recorded in the RevenueBase company graph · Oct 9, 2026 · View company records in RevenueBase
9	NWG S.P.A	Exact match	Prato, ItalyHQ recorded Oct 9, 2026	n/a	755 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 · Oct 9, 2026 · View company records in RevenueBase
10	Grid Alternatives	Exact match	Oakland, CA, United StatesHQ recorded Oct 9, 2026	201-500	714 contacts →
	Exact match “GRID Alternatives is a national leader in bringing affordable solar power, clean mobility, and energy storage to underserved communities while creating pathways to life-changing…” Recorded in the RevenueBase company graph · Oct 9, 2026 · View company records in RevenueBase
11	LUMIO	Exact match	Lehi, UT, United StatesHQ recorded Oct 9, 2026	5,001-10,000	659 contacts →
	Exact match “We’re on a mission to make power personal.” Recorded in the RevenueBase company graph · Oct 9, 2026 · View company records in RevenueBase
12	Serena	Exact match	São Paulo, BrazilHQ recorded Oct 9, 2026	201-500	645 contacts →
	Exact match “Making the provision of solar and wind energy accessible to everyone - from large global companies seeking sustainable profitability, to families seeking guilt-free energy…” Recorded in the RevenueBase company graph · Oct 9, 2026 · View company records in RevenueBase
13	Igreen Energy Oficial	Exact match	Uberlândia, BrazilHQ recorded Oct 9, 2026	n/a	645 contacts →
	Exact match “Olá, somos a iGreen Energy, uma empresa Mineira da cidade de Uberlândia que nasceu com o propósito de conscientizar as pessoas e empresas da importância de um futuro melhor…” Recorded in the RevenueBase company graph · Oct 9, 2026 · View company records in RevenueBase
14	Fenice Energy	Exact match	Chennai, IndiaHQ recorded Oct 9, 2026	201-500	635 contacts →
	Exact match “Fenice Energy provides high-quality end-to-end clean energy solutions for homes including solar, backup, and eV charging.” Recorded in the RevenueBase company graph · Oct 9, 2026 · View company records in RevenueBase
15	Palmetto	Exact match	Charlotte, NC, United StatesHQ recorded Oct 9, 2026	201-500	606 contacts →
	Exact match “Palmetto is a leading clean tech company on a mission to accelerate the transition to a clean energy future.” Recorded in the RevenueBase company graph · Oct 9, 2026 · View company records in RevenueBase
16	Apex Clean Energy	Exact match	Charlottesville, VA, United StatesHQ recorded Oct 9, 2026	201-500	574 contacts →
	Exact match “Apex Clean Energy was founded with a singular focus: to accelerate the shift to clean energy.” Recorded in the RevenueBase company graph · Oct 9, 2026 · View company records in RevenueBase
17	EDP Portugal	Exact match	Lisbon, PortugalHQ recorded Oct 9, 2026	10001+	574 contacts →
	Exact match “Our story began 50 years ago in Portugal.” Recorded in the RevenueBase company graph · Oct 9, 2026 · View company records in RevenueBase
18	AIRA	Exact match	Stockholm, SwedenHQ recorded Oct 9, 2026	201-500	570 contacts →
	Exact match “Aira is the next generation home energy champion.” Recorded in the RevenueBase company graph · Oct 9, 2026 · View company records in RevenueBase
19	Skyelectric Pvt. LTD	Exact match	Islamabad, PakistanHQ recorded Oct 9, 2026	501-1,000	551 contacts →
	Exact match “As we all know, the developing world is suffering from severe energy poverty.” Recorded in the RevenueBase company graph · Oct 9, 2026 · View company records in RevenueBase
20	Good Energy	Exact match	Chippenham, United KingdomHQ recorded Oct 9, 2026	201-500	493 contacts →
	Exact match “Good Energy has been driving the UK’s renewable energy revolution since helping homes and businesses become greener and more self-sufficient through clean power and green…” Recorded in the RevenueBase company graph · Oct 9, 2026 · View company records in RevenueBase
21	Sonnen Gmbh	Exact match	Wildpoldsried, GermanyHQ recorded Oct 9, 2026	501-1,000	487 contacts →
	Exact match “Clean, affordable energy for all is one of the greatest challenges of our time.” Recorded in the RevenueBase company graph · Oct 9, 2026 · View company records in RevenueBase
22	STARK	Exact match	Horley, United KingdomHQ recorded Oct 9, 2026	201-500	453 contacts →
	Exact match “Our mission: We’ve been on a mission to help identify energy waste, save costs and reduce carbon emissions for more than 40 years.” Recorded in the RevenueBase company graph · Oct 9, 2026 · View company records in RevenueBase
23	Thermondo	Exact match	Berlin, GermanyHQ recorded Oct 9, 2026	1,001-5,000	440 contacts →
	Exact match “Gemeinsam machen wir Wohnen klimaneutral!” Recorded in the RevenueBase company graph · Oct 9, 2026 · View company records in RevenueBase
24	Energy Saving Trust	Exact match	London, United KingdomHQ recorded Oct 9, 2026	201-500	440 contacts →
	Exact match “Energy Saving Trust is an independent organisation dedicated to promoting energy efficiency, low carbon transport and sustainable energy use.” Recorded in the RevenueBase company graph · Oct 9, 2026 · View company records in RevenueBase
25	Posigen	Exact match	St. Rose, LA, United StatesHQ recorded Oct 9, 2026	501-1,000	433 contacts →
	Exact match “PosiGen is the nation's leading residential solar and energy efficiency provider.” 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 “clean energy nonprofits”. 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 7,178 clean energy nonprofits worldwide

See the full list, filter by size, metro and specialty, and access 27,519 tracked professional contacts with verified work emails. Direct dials are available where recorded.

Free signup · no credit card

View the full list →

Clean energy nonprofits worldwide at a glance

As of Oct 9, 2026

28.2%Verified-email coverage

13.6Average contacts per company

1-10Median size (employees)

1.3%Largest-city concentration · London

Oct 9, 2026Page data refreshed

Companies by employee count

1-10

3,984

11-50

2,293

51-200

646

201-500

145

501-1,000

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 clean energy nonprofits are linked below.
What qualifies: Company records worldwide whose business descriptions match “clean energy nonprofits” 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 27,519 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.

Clean energy nonprofits by location

40 lists · largest first

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

How many clean energy nonprofits are there worldwide?

RevenueBase identified 7,178 company matches for clean energy nonprofits 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?

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

Which country has the most clean energy nonprofits?

The United States leads with 1,797 companies, followed by India (431) and the United Kingdom (389). Every clean energy nonprofits list by country and city is linked on this page.

Which city has the most clean energy nonprofits?

London leads with 92 company records, followed by Washington (63) and New York (61).

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 27,519 professional contacts with verified work emails tracked across these 7,178 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 7,178 clean energy nonprofits 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.