Company lists · Data refreshed October 2026

Top 25 Energy efficiency nonprofits worldwide

Name: Energy efficiency nonprofits worldwide
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Oct 12, 2026 4,727 companies tracked

RevenueBase identified 4,727 company matches for energy efficiency nonprofits worldwide as of October 2026 and tracks 47,219 professional contacts across them, including 14,003 with verified work emails. The United States is the largest market and Paris the largest hub.

This list covers company matches for energy efficiency 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 12, 2026. Country and city lists for energy efficiency 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 12, 2026 How this list was built

4,727Companies

47,219Contacts tracked

14,003Verified emails

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

The 25 largest energy efficiency nonprofits worldwide

Ranked by team size

Top 25 of 4,727 company matches for energy efficiency nonprofits worldwide, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Oct 12, 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	Clearesult	Exact match	Austin, TX, United StatesHQ recorded Oct 12, 2026	1,001-5,000	2,206 contacts →
	Exact match “CLEAResult is the largest provider of energy efficiency, energy transition and energy sustainability services in North America.” Recorded in the RevenueBase company graph · Oct 12, 2026 · View company records in RevenueBase
2	Powur, PBC	Exact match	San Diego, United StatesHQ recorded Oct 12, 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 12, 2026 · View company records in RevenueBase
3	NWG S.P.A	Exact match	Prato, ItalyHQ recorded Oct 12, 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 12, 2026 · View company records in RevenueBase
4	AIRA	Exact match	Stockholm, SwedenHQ recorded Oct 12, 2026	201-500	570 contacts →
	Exact match “Aira is the next generation home energy champion.” Recorded in the RevenueBase company graph · Oct 12, 2026 · View company records in RevenueBase
5	Sonnen Gmbh	Exact match	Wildpoldsried, GermanyHQ recorded Oct 12, 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 12, 2026 · View company records in RevenueBase
6	Consortium For Energy Efficiency	Exact match	Middleton, MA, United StatesHQ recorded Oct 12, 2026	n/a	485 contacts →
	Exact match “Please visit our careers page, for positions at CEE and CEE member organizations.” Recorded in the RevenueBase company graph · Oct 12, 2026 · View company records in RevenueBase
7	STARK	Exact match	Horley, United KingdomHQ recorded Oct 12, 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 12, 2026 · View company records in RevenueBase
8	Thermondo	Exact match	Berlin, GermanyHQ recorded Oct 12, 2026	1,001-5,000	440 contacts →
	Exact match “Gemeinsam machen wir Wohnen klimaneutral!” Recorded in the RevenueBase company graph · Oct 12, 2026 · View company records in RevenueBase
9	Energy Saving Trust	Exact match	London, United KingdomHQ recorded Oct 12, 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 12, 2026 · View company records in RevenueBase
10	Posigen	Exact match	St. Rose, LA, United StatesHQ recorded Oct 12, 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 12, 2026 · View company records in RevenueBase
11	Homeworks Energy, INC	Exact match	Medford, MA, United StatesHQ recorded Oct 12, 2026	201-500	369 contacts →
	Exact match “At HomeWorks Energy, our mission is simple, literally: Energy Efficiency, Simplified.” Recorded in the RevenueBase company graph · Oct 12, 2026 · View company records in RevenueBase
12	Cascade Energy	Exact match	Portland, OR, United StatesHQ recorded Oct 12, 2026	201-500	301 contacts →
	Exact match “At Cascade Energy, we believe in better.” Recorded in the RevenueBase company graph · Oct 12, 2026 · View company records in RevenueBase
13	EFFY	Exact match	Paris, FranceHQ recorded Oct 12, 2026	201-500	293 contacts →
	Exact match “Effy, spécialiste de l’efficience énergétique.” Recorded in the RevenueBase company graph · Oct 12, 2026 · View company records in RevenueBase
14	Energy Trust Of Oregon	Exact match	Portland, OR, United StatesHQ recorded Oct 12, 2026	51-200	265 contacts →
	Exact match “Energy Trust of Oregon is an independent nonprofit organization dedicated to helping utility customers benefit from saving energy and generating renewable power.” Recorded in the RevenueBase company graph · Oct 12, 2026 · View company records in RevenueBase
15	CMC Energy Services	Exact match	Fort Washington, PA, United StatesHQ recorded Oct 12, 2026	201-500	261 contacts →
	Exact match “CMC Energy Services is a woman-owned full-service energy efficiency company with nearly 50 years of experience delivering value-based energy conservation services.” Recorded in the RevenueBase company graph · Oct 12, 2026 · View company records in RevenueBase
16	Lime Energy	Exact match	Newark, NJ, United StatesHQ recorded Oct 12, 2026	201-500	248 contacts →
	Exact match “Lime Energy is building a new energy future.” Recorded in the RevenueBase company graph · Oct 12, 2026 · View company records in RevenueBase
17	Hello Watt	Exact match	Paris, FranceHQ recorded Oct 12, 2026	201-500	233 contacts →
	Exact match “Chez Hello Watt, nous avons une conviction : la transition énergétique doit être simple et accessible à tous.” Recorded in the RevenueBase company graph · Oct 12, 2026 · View company records in RevenueBase
18	Walker-Miller Energy Services	Exact match	Detroit, MI, United StatesHQ recorded Oct 12, 2026	51-200	222 contacts →
	Exact match “Walker-Miller Energy Services (Walker-Miller), one of the largest African American and woman owned energy efficiency companies in the United States, changes lives through energy.” Recorded in the RevenueBase company graph · Oct 12, 2026 · View company records in RevenueBase
19	Efficiencyone	Exact match	Dartmouth, NS, CanadaHQ recorded Oct 12, 2026	51-200	221 contacts →
	Exact match “EfficiencyOne is a leading efficiency expert.” Recorded in the RevenueBase company graph · Oct 12, 2026 · View company records in RevenueBase
20	Center For Energy And Environment	Exact match	Minneapolis, MN, United StatesHQ recorded Oct 12, 2026	51-200	220 contacts →
	Exact match “CEE is a community-based clean energy nonprofit with special expertise in energy efficiency that stretches back 40 years.” Recorded in the RevenueBase company graph · Oct 12, 2026 · View company records in RevenueBase
21	Richard Heath & Associates, Inc. RHA	Exact match	Fresno, CA, United StatesHQ recorded Oct 12, 2026	501-1,000	217 contacts →
	Exact match “Now part of Resource Innovations, RHA will expand its team to over 1,100 professionals, broadening expertise and offering clients additional solutions in energy storage and…” Recorded in the RevenueBase company graph · Oct 12, 2026 · View company records in RevenueBase
22	Dalkia Energy Solutions	Exact match	Beverly, MA, United StatesHQ recorded Oct 12, 2026	201-500	213 contacts →
	Exact match “Dalkia Energy Solutions, a subsidiary of the EDF (Électricité de France) Group, is a national leader in energy efficiency and sustainability for commercial, industrial, and…” Recorded in the RevenueBase company graph · Oct 12, 2026 · View company records in RevenueBase
23	D2o	Exact match	Jaipur, IndiaHQ recorded Oct 12, 2026	51-200	204 contacts →
	Exact match “Design2Occupancy Services LLP (D2O) is a leading organization providing a platform and solutions in Energy Efficiency Analysis and Energy Code Compliances, Climate Change…” Recorded in the RevenueBase company graph · Oct 12, 2026 · View company records in RevenueBase
24	Bright Power	Exact match	New York, NY, United StatesHQ recorded Oct 12, 2026	51-200	201 contacts →
	Exact match “Bright Power is a leading provider of energy efficiency and decarbonization solutions for the real estate industry.” Recorded in the RevenueBase company graph · Oct 12, 2026 · View company records in RevenueBase
25	Ever-Green Energy	Exact match	St. Paul, MN, United StatesHQ recorded Oct 12, 2026	201-500	193 contacts →
	Exact match “Ever-Green Energy is a recognized leader in energy conservation and the use of renewable energy.” Recorded in the RevenueBase company graph · Oct 12, 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 “energy efficiency 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 4,727 energy efficiency nonprofits worldwide

See the full list, filter by size, metro and specialty, and access 14,003 tracked professional contacts with verified work emails. Direct dials are available where recorded.

Free signup · no credit card

View the full list →

Energy efficiency nonprofits worldwide at a glance

As of Oct 12, 2026

29.7%Verified-email coverage

10.0Average contacts per company

1-10Median size (employees)

1.2%Largest-city concentration · Paris

Oct 12, 2026Page data refreshed

Companies by employee count

1-10

2,864

11-50

1,389

51-200

362

201-500

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 energy efficiency nonprofits are linked below.
What qualifies: Company records worldwide whose business descriptions match “energy efficiency 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 14,003 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 12, 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.

Energy efficiency nonprofits by location

23 lists · largest first

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

How many energy efficiency nonprofits are there worldwide?

RevenueBase identified 4,727 company matches for energy efficiency 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?

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

Which country has the most energy efficiency nonprofits?

The United States leads with 1,089 companies, followed by the United Kingdom (333) and France (289). Every energy efficiency nonprofits list by country and city is linked on this page.

Which city has the most energy efficiency nonprofits?

Paris leads with 59 company records, followed by London (55) and Madrid (52).

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 14,003 professional contacts with verified work emails tracked across these 4,727 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 12, 2026.

Ready to reach these companies? Verified emails and direct dials for all 4,727 energy efficiency 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.