Company lists · Data refreshed November 2026

Top 25 Utility efficiency consultants worldwide

RevenueBase identified 2,294 company matches for utility efficiency consultants worldwide as of November 2026 and tracks 32,624 professional contacts across them, including 9,530 with verified work emails. The United States is the largest market and Paris the largest hub.

This list covers company matches for utility efficiency consultants 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 utility efficiency consultants 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
2,294Companies
32,624Contacts tracked
9,530Verified emails
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The 25 largest utility efficiency consultants worldwide

Ranked by team size
Top 25 of 2,294 company matches for utility efficiency consultants 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 matchWindsor, United KingdomHQ recorded Nov 6, 202610001+9,964 contacts →

Exact match

“Taking care of things.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
2Exact matchLondon, United KingdomHQ recorded Nov 6, 20261,001-5,0002,764 contacts →

Exact match

“We help businesses manage energy needs, boost efficiency, control costs and achieve decarbonisation goals for a better energy future.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
3Exact matchAnaheim, CA, United StatesHQ recorded Nov 6, 20261,001-5,000897 contacts →

Exact match

“Willdan (NASDAQ: WLDN) provides professional consulting and technical services to utilities, public agencies and private industry throughout the United States.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
4Exact matchBrazilHQ recorded Nov 6, 2026201-500558 contacts →

Exact match

“A 3E Engenharia atua nacionalmente, oferecendo soluções para empresas concessionárias de serviços públicos, no planejamento, gestão, execução e inovação em projetos de Eficiência…”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
5Exact matchIstanbul, TürkiyeHQ recorded Nov 6, 2026201-500336 contacts →

Exact match

“A World Brand/Pride of Turkey In Energy Quality ENTES is a family that works ardently for energy quality and efficiency in our country, where energy is valuable and overcosting.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
6Exact matchRedditch, United KingdomHQ recorded Nov 6, 202651-200320 contacts →

Exact match

“EIC Partnership: A Legacy of Expertise, A Commitment to Sustainability With origins dating back to 1975, EIC has cultivated nearly 50 years of distinguished service in energy and…”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
7Exact matchPortland, OR, United StatesHQ recorded Nov 6, 2026201-500304 contacts →

Exact match

“At Cascade Energy, we believe in better.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
8Exact matchSao Paulo, BrazilHQ recorded Nov 6, 202651-200237 contacts →

Exact match

“Empresa voltada a projetos de Otimização e Eficiêntização no uso da energia elétrica.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
9Exact 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
10Exact matchDetroit, MI, United StatesHQ recorded Nov 6, 202651-200227 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 · Nov 6, 2026 · View company records in RevenueBase
11Exact matchFairfax, VA, United StatesHQ recorded Nov 6, 2026201-500223 contacts →

Exact match

“PEG presents a comprehensive capacity for the evaluation and understanding of a broad base of energy and environmental sustainability related programs, policies and initiatives.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
12Exact matchSydney, AustraliaHQ recorded Nov 6, 202651-200164 contacts →

Exact match

“Zembl is an energy procurement specialist and total business energy partner.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
13Exact matchBollullos De La Mitación, SpainHQ recorded Nov 6, 2026201-500164 contacts →

Exact match

“QUANTICA Renovables is a company dedicated to providing cost and carbon efficiencies.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
14Exact matchHebburn, United KingdomHQ recorded Nov 6, 2026201-500160 contacts →

Exact match

“At Consultiv Utilities, we help organisations to take control of their energy strategy and support them in navigating the complexities of energy, with confidence.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
15Exact matchParsippany, United StatesHQ recorded Nov 6, 202651-200149 contacts →

Exact match

“UMS Group is now E Source!”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
16Exact matchBirmingham, AL, United StatesHQ recorded Nov 6, 202651-200141 contacts →

Exact match

“Sain Engineering Associates, Inc.(SEA) is a U.S.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
17Exact matchPortland, OR, United StatesHQ recorded Nov 6, 202651-200135 contacts →

Exact match

“As a team at Evergreen Energy Partners, we specialize in connecting utility customers with expert knowledge and innovative solutions for commercial, industrial, and residential…”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
18Exact matchLa Crosse, IA, United StatesHQ recorded Nov 6, 202651-200129 contacts →

Exact match

“Michaels Energy is a veteran-owned energy consulting firm that exists to help businesses minimize waste and maximize value.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
19Exact matchIthaca, NY, United StatesHQ recorded Nov 6, 202651-200120 contacts →

Exact match

“PSD is an energy efficiency services and technology company.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
20Exact matchBoston, ON, CanadaHQ recorded Nov 6, 202611-50119 contacts →

Exact match

“MPN Capital Markets is a full-service, energy management consulting firm that advises businesses, governments, non-governmental organizations, homeowners and not-for-profits.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
21Exact matchAalst, BelgiumHQ recorded Nov 6, 2026n/a119 contacts →

Exact match

“Wij helpen industriële bedrijven hun energiekosten te verminderen.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
22Exact matchSão Paulo, BrazilHQ recorded Nov 6, 202651-200112 contacts →

Exact match

“Somos uma empresa especializada em gestão energética com o propósito de oferecer um novo conceito de prestação de serviços na área de energia, focada nas tecnologias e práticas…”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
23Exact matchOakland, ID, United StatesHQ recorded Nov 6, 202651-200102 contacts →

Exact match

“In 1998, I started kW Engineering as a two-person firm with a singular vision: to become the leading technical experts at saving money in buildings by saving energy and water.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
24Exact matchSant Joan Despi, SpainHQ recorded Nov 6, 202651-200100 contacts →

Exact match

“We are one of the leading energy business consultancies in Spain.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
25Exact matchWigan, United KingdomHQ recorded Nov 6, 2026n/a99 contacts →

Exact match

Recorded description not available.

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

Showing 25 of 2,294 utility efficiency consultants worldwide

See the full list, filter by size, metro and specialty, and access 9,530 tracked professional contacts with verified work emails. Direct dials are available where recorded.

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Utility efficiency consultants worldwide at a glance

As of Nov 6, 2026
29.2%Verified-email coverage
14.2Average contacts per company
1-10Median size (employees)
1.4%Largest-city concentration · Paris
Nov 6, 2026Page data refreshed

Companies by employee count

1-10
1,514
11-50
604
51-200
126
201-500
22
501-1,000
5
1,001-5,000
8
10001+
2

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 utility efficiency consultants are linked below.
What qualifies
Company records worldwide whose business descriptions match “utility efficiency consultants” 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 9,530 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.

Utility efficiency consultants by location

12 lists · largest first

Every Utility efficiency consultants list RevenueBase publishes, by country and city. Counts are matching companies in each list as of its own refresh date.

Countries

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 “utility efficiency consultants”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many utility efficiency consultants are there worldwide?

RevenueBase identified 2,294 company matches for utility efficiency consultants 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?

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

Which country has the most utility efficiency consultants?

The United States leads with 438 companies, followed by Spain (197) and the United Kingdom (191). Every utility efficiency consultants list by country and city is linked on this page.

Which city has the most utility efficiency consultants?

Paris leads with 32 company records, followed by Madrid (27) and London (24).

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 9,530 professional contacts with verified work emails tracked across these 2,294 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.