Company lists · Data refreshed November 2026

Top 25 Green building nonprofits worldwide

RevenueBase identified 4,553 company matches for green building nonprofits worldwide as of November 2026 and tracks 40,652 professional contacts across them, including 11,420 with verified work emails. The United States is the largest market and London the largest hub.

This list covers company matches for green building 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 November 6, 2026. Country and city lists for green building 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 Nov 6, 2026 How this list was built
4,553Companies
40,652Contacts tracked
11,420Verified emails
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The 25 largest green building nonprofits worldwide

Ranked by team size
Top 25 of 4,553 company matches for green building nonprofits 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.
#CompanyRevenueBase SmartSearchHeadquartersEmployeesContacts
1Exact matchAustin, TX, United StatesHQ recorded Nov 6, 2026n/a1,164 contacts →

Exact match

“OLA Sustainability, LLC OLA Sustainability is a consulting firm that focuses on integrating sustainable practices into commercial and multifamily design projects.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
2Exact matchSan Diego, United StatesHQ recorded Nov 6, 2026n/a1,155 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 · Nov 6, 2026 · View company records in RevenueBase
3Exact matchWashington, United StatesHQ recorded Nov 6, 2026201-5001,011 contacts →

Exact match

“ULI - the Urban Land Institute is a 501(c)(3) nonprofit research and education organization supported by its members.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
4Exact matchWashington, DC, United StatesHQ recorded Nov 6, 2026201-500560 contacts →

Exact match

“The U.S.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
5Exact matchStrasbourg, FranceHQ recorded Nov 6, 202610001+519 contacts →

Exact match

“Une entreprise centenaire reconnaît son influence et l'importance de son rôle pour l'avenir.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
6Exact matchVianen, NetherlandsHQ recorded Nov 6, 2026501-1,000504 contacts →

Exact match

“Hanab Installation Technology maakt toekomstbestendige gebouwen en woningen met een gezond binnenklimaat.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
7Exact matchGlasgow, United KingdomHQ recorded Nov 6, 2026201-500405 contacts →

Exact match

“IES is an innovative company at the forefront of the development and application of powerful software simulation tools and consulting services for architects, engineers and others…”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
8Exact matchVienna, AustriaHQ recorded Nov 6, 2026501-1,000385 contacts →

Exact match

“GROPYUS advances the development of sustainable buildings.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
9Exact matchIndianapolis, CO, United StatesHQ recorded Nov 6, 2026201-500335 contacts →

Exact match

“We design and construct high-performing buildings and systems.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
10Exact matchLannilis, FranceHQ recorded Nov 6, 2026201-500285 contacts →

Exact match

“Créé en 1972 par Marcel Tréguer, le Groupe Trécobat est le leader la maison BBC (Bâtiment Basse Consommation).”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
11Exact matchTampa, FL, United StatesHQ recorded Nov 6, 2026201-500245 contacts →

Exact match

“We are creating a more sustainable and better earth through solar energy.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
12Exact matchAshburn, VA, United StatesHQ recorded Nov 6, 2026201-500238 contacts →

Exact match

“Building resilient communities by reducing risk, enhancing public safety and improving quality of life.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
13Exact matchDartmouth, NS, CanadaHQ recorded Nov 6, 202651-200228 contacts →

Exact match

“EfficiencyOne is a leading efficiency expert.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
14Exact matchMinneapolis, MN, United StatesHQ recorded Nov 6, 202651-200224 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 · Nov 6, 2026 · View company records in RevenueBase
15Exact matchFresno, CA, United StatesHQ recorded Nov 6, 2026501-1,000218 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 · Nov 6, 2026 · View company records in RevenueBase
16Exact matchJaipur, IndiaHQ recorded Nov 6, 202651-200211 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 · Nov 6, 2026 · View company records in RevenueBase
17Exact matchAmsterdam, NetherlandsHQ recorded Nov 6, 2026201-500170 contacts →

Exact match

“Klimaatroute zet mensen in beweging.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
18Exact matchWashington, DC, United StatesHQ recorded Nov 6, 2026n/a159 contacts →

Exact match

“The premier organization independently recognizing excellence in green business industry performance and practice globally.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
19Exact matchTraverse City, MI, United StatesHQ recorded Nov 6, 202651-200159 contacts →

Exact match

“We are a 501c3 nonprofit organization established to foster local solutions to global issues.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
20Exact matchLondon, United KingdomHQ recorded Nov 6, 202651-200156 contacts →

Exact match

“CIBSE is the leading global body for building professionals, championing sustainability, innovation and building performance across the built environment.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
21Exact matchLeeds, United KingdomHQ recorded Nov 6, 20261,001-5,000155 contacts →

Exact match

“At Genuit Group, we’re driven by a clear purpose: to create a more sustainable built environment and a more resilient future for people and the planet.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
22Exact matchBeverly Hills, CA, United StatesHQ recorded Nov 6, 202651-200154 contacts →

Exact match

“As the Los Angeles region faces severe impacts from climate change, TreePeople unites the power of trees, people and nature-based solutions to grow a more climate-ready city.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
23Exact matchMexico City, MexicoHQ recorded Nov 6, 202651-200153 contacts →

Exact match

“En GPO VALLAS estamos comprometidos con la construcción de un futuro sostenible y próspero para nuestras ciudades y el planeta en su conjunto.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
24Exact matchSanta Cruz, CA, United StatesHQ recorded Nov 6, 202651-200152 contacts →

Exact match

“Ecology Action is an award-winning California 501(c)(3) non-profit that’s been inspiring sustainable community actions since 1970.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
25Exact matchMadison, WI, United StatesHQ recorded Nov 6, 202651-200151 contacts →

Exact match

“We're a nonprofit headquartered in Madison, WI with an office in Chicago and remote staff across the U.S.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase

Showing 25 of 4,553 green building nonprofits worldwide

See the full list, filter by size, metro and specialty, and access 11,420 tracked professional contacts with verified work emails. Direct dials are available where recorded.

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Green building nonprofits worldwide at a glance

As of Nov 6, 2026
28.1%Verified-email coverage
8.9Average contacts per company
1-10Median size (employees)
1.4%Largest-city concentration · London
Nov 6, 2026Page data refreshed

Companies by employee count

1-10
3,055
11-50
1,112
51-200
258
201-500
61
501-1,000
22
1,001-5,000
12
5,001-10,000
1
10001+
7

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 green building nonprofits are linked below.
What qualifies
Company records worldwide whose business descriptions match “green building 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 11,420 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.

Green building nonprofits by location

26 lists · largest first

Every Green building 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 “green building nonprofits”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many green building nonprofits are there worldwide?

RevenueBase identified 4,553 company matches for green building nonprofits 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?

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

Which country has the most green building nonprofits?

The United States leads with 1,269 companies, followed by India (253) and the United Kingdom (236). Every green building nonprofits list by country and city is linked on this page.

Which city has the most green building nonprofits?

London leads with 64 company records, followed by New York (47) and Paris (34).

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 11,420 professional contacts with verified work emails tracked across these 4,553 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.