Company lists · Data refreshed October 2026

Top 25 Building energy efficiency companies worldwide

Name: Building energy efficiency companies worldwide
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Oct 9, 2026 12,516 companies tracked

RevenueBase identified 12,516 company matches for building energy efficiency companies worldwide as of October 2026 and tracks 185,943 professional contacts across them, including 48,319 with verified work emails. The United States is the largest market and Madrid the largest hub.

This list covers company matches for building energy efficiency companies 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 building energy efficiency companies 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

12,516Companies

185,943Contacts tracked

48,319Verified emails

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The 25 largest building energy efficiency companies worldwide

Ranked by team size

Top 25 of 12,516 company matches for building energy efficiency companies 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	Johnson Controls	Exact match	Cork, IrelandHQ recorded Oct 9, 2026	10001+	54,046 contacts →
	Exact match “Johnson Controls is a global leader in thermal management, mission-critical building systems, energy efficiency and decarbonization.” Recorded in the RevenueBase company graph · Oct 9, 2026 · View company records in RevenueBase
2	British GAS	Exact match	Windsor, United KingdomHQ recorded Oct 9, 2026	10001+	9,535 contacts →
	Exact match “Taking care of things.” Recorded in the RevenueBase company graph · Oct 9, 2026 · View company records in RevenueBase
3	Mckinstry	Exact match	Seattle, WA, United StatesHQ recorded Oct 9, 2026	1,001-5,000	2,293 contacts →
	Exact match “We're a national construction and energy services company dedicated to innovating the waste and climate harm out of the built environment.” Recorded in the RevenueBase company graph · Oct 9, 2026 · View company records in RevenueBase
4	Clearesult	Exact match	Austin, TX, United StatesHQ recorded Oct 9, 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 9, 2026 · View company records in RevenueBase
5	Ameresco	Exact match	Framingham, MA, United StatesHQ recorded Oct 9, 2026	1,001-5,000	1,513 contacts →
	Exact match “Ameresco, Inc.(NYSE:AMRC) is a leading energy infrastructure solutions provider dedicated to helping customers reduce costs, enhance resilience, and decarbonize to net zero in the…” Recorded in the RevenueBase company graph · Oct 9, 2026 · View company records in RevenueBase
6	ISTA	Exact match	Essen, GermanyHQ recorded Oct 9, 2026	5,001-10,000	1,503 contacts →
	Exact match “Wir geben Häusern eine Zukunft.” Recorded in the RevenueBase company graph · Oct 9, 2026 · View company records in RevenueBase
7	Aden Group	Exact match	SingaporeHQ recorded Oct 9, 2026	10001+	1,203 contacts →
	Exact match “Aden Group is a Euro-Asian enterprise delivering comprehensive solutions to boost decarbonization, productivity and energy transition in the built environment.” Recorded in the RevenueBase company graph · Oct 9, 2026 · View company records in RevenueBase
8	GK	Exact match	Oslo, NorwayHQ recorded Oct 9, 2026	1,001-5,000	1,134 contacts →
	Exact match “GK er en ledende teknisk entreprenør og servicepartner.” Recorded in the RevenueBase company graph · Oct 9, 2026 · View company records in RevenueBase
9	PAE	Exact match	Portland, OR, United StatesHQ recorded Oct 9, 2026	201-500	835 contacts →
	Exact match “PAE provides mechanical and electrical engineering design, technology system design, energy modeling and analysis, and more.” Recorded in the RevenueBase company graph · Oct 9, 2026 · View company records in RevenueBase
10	Sunnova Energy	Exact match	Houston, TX, United StatesHQ recorded Oct 9, 2026	501-1,000	770 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 · Oct 9, 2026 · View company records in RevenueBase
11	Linc Facility Services	Exact match	United StatesHQ recorded Oct 9, 2026	1,001-5,000	740 contacts →
	Exact match “The Linc Group is an award-winning provider of integrated facilities management, HVAC and building systems services, lighting and electrical solutions, and other support services…” Recorded in the RevenueBase company graph · Oct 9, 2026 · View company records in RevenueBase
12	Climatec, LLC	Exact match	Phoenix, AZ, United StatesHQ recorded Oct 9, 2026	1,001-5,000	666 contacts →
	Exact match “Climatec has been making buildings safer, more comfortable and efficient for over 40 years.” Recorded in the RevenueBase company graph · Oct 9, 2026 · View company records in RevenueBase
13	Albireo Energy	Exact match	Edison, NJ, United StatesHQ recorded Oct 9, 2026	1,001-5,000	658 contacts →
	Exact match “Albireo Energy is a leading independent building controls and energy services provider recognized by customers for creating intelligent, high-performance buildings.” Recorded in the RevenueBase company graph · Oct 9, 2026 · View company records in RevenueBase
14	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
15	Nordomatic	Exact match	Stockholm, SwedenHQ recorded Oct 9, 2026	1,001-5,000	572 contacts →
	Exact match “Nordomatic is a global impact pioneer in smart buildings, helping you optimize, simplify, and future-proof your operations.” Recorded in the RevenueBase company graph · Oct 9, 2026 · View company records in RevenueBase
16	Kieback&peter	Exact match	Berlin, GermanyHQ recorded Oct 9, 2026	1,001-5,000	560 contacts →
	Exact match “Our DNA are sustainable buildings As a Smart Building Solutioneer, we combine intelligent building technologies, data-based services, sustainable excellence and multiple synergy…” Recorded in the RevenueBase company graph · Oct 9, 2026 · View company records in RevenueBase
17	Airmaster	Exact match	Scoresby, AustraliaHQ recorded Oct 9, 2026	1,001-5,000	507 contacts →
	Exact match “At Airmaster, our goal is to lead the way in integrated building services, combining HVAC & R, building automation, electrical, and fire systems to create smart buildings that are…” Recorded in the RevenueBase company graph · Oct 9, 2026 · View company records in RevenueBase
18	Noresco	Exact match	Westborough, MA, United StatesHQ recorded Oct 9, 2026	201-500	479 contacts →
	Exact match “NORESCO, an OPTERRA company, helps customers modernize aging building systems and upgrade energy and water infrastructure to meet evolving demands.” Recorded in the RevenueBase company graph · Oct 9, 2026 · View company records in RevenueBase
19	NIKO	Exact match	Sint Niklaas, BelgiumHQ recorded Oct 9, 2026	501-1,000	477 contacts →
	Exact match “Niko designs electr(on)ic solutions to enhance buildings to better suit the needs of the people who live and work in them.” Recorded in the RevenueBase company graph · Oct 9, 2026 · View company records in RevenueBase
20	Korra Energi	Exact match	Cairo, EgyptHQ recorded Oct 9, 2026	1,001-5,000	476 contacts →
	Exact match “Korra Energi is a proud Egyptian leader in energy efficiency and construction services, backed by over 25 years of expertise and a vision of "Growth and Prosperity"(إعمار الأرض).” Recorded in the RevenueBase company graph · Oct 9, 2026 · View company records in RevenueBase
21	Veolia Industries Global Solutions	Exact match	Aubervilliers, FranceHQ recorded Oct 9, 2026	1,001-5,000	429 contacts →
	Exact match “Veolia Industries Global Solutions est devenu Veolia Energie Performance depuis le 1er juin 2025.” Recorded in the RevenueBase company graph · Oct 9, 2026 · View company records in RevenueBase
22	Fuse Energy	Exact match	London, TX, United KingdomHQ recorded Oct 9, 2026	501-1,000	412 contacts →
	Exact match “We are building a full stack energy company to lower cost of energy & accelerate energy abundance.” Recorded in the RevenueBase company graph · Oct 9, 2026 · View company records in RevenueBase
23	View, INC	Exact match	San Jose, CA, United StatesHQ recorded Oct 9, 2026	201-500	410 contacts →
	Exact match “View is the leader in smart building technologies that transform buildings to improve human health and experience, reduce energy consumption and carbon emissions, and generate…” Recorded in the RevenueBase company graph · Oct 9, 2026 · View company records in RevenueBase
24	Veregy	Exact match	Phoenix, MO, United StatesHQ recorded Oct 9, 2026	501-1,000	403 contacts →
	Exact match “Veregy is an award-winning NAESCO-Accredited decarbonization company focusing on accelerating and simplifying the Energy Transition.” Recorded in the RevenueBase company graph · Oct 9, 2026 · View company records in RevenueBase
25	Budderfly	Exact match	Shelton, CT, United StatesHQ recorded Oct 9, 2026	201-500	380 contacts →
	Exact match “Budderfly is redefining how energy efficiency, resilience, and grid participation can work together across America’s commercial sector.” 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 “building energy efficiency companies”. 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 12,516 building energy efficiency companies worldwide

See the full list, filter by size, metro and specialty, and access 48,319 tracked professional contacts with verified work emails. Direct dials are available where recorded.

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Building energy efficiency companies worldwide at a glance

As of Oct 9, 2026

26.0%Verified-email coverage

14.9Average contacts per company

1-10Median size (employees)

0.9%Largest-city concentration · Madrid

Oct 9, 2026Page data refreshed

Companies by employee count

1-10

6,943

11-50

4,166

51-200

1,034

201-500

181

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 building energy efficiency companies are linked below.
What qualifies: Company records worldwide whose business descriptions match “building energy efficiency companies” 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 48,319 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.

Building energy efficiency companies by location

59 lists · largest first

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

How many building energy efficiency companies are there worldwide?

RevenueBase identified 12,516 company matches for building energy efficiency companies 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?

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

Which country has the most building energy efficiency companies?

The United States leads with 2,111 companies, followed by France (909) and Italy (815). Every building energy efficiency companies list by country and city is linked on this page.

Which city has the most building energy efficiency companies?

Madrid leads with 115 company records, followed by London (107) and Paris (106).

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 48,319 professional contacts with verified work emails tracked across these 12,516 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.

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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.