Company lists · Data refreshed November 2026

Top 25 Net zero design consultants worldwide

RevenueBase identified 2,199 company matches for net zero design consultants worldwide as of November 2026 and tracks 35,285 professional contacts across them, including 11,941 with verified work emails. The United Kingdom is the largest market and London the largest hub.

This list covers company matches for net zero design 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 net zero design 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
2,199Companies
35,285Contacts tracked
11,941Verified emails
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The 25 largest net zero design consultants worldwide

Ranked by team size
Top 25 of 2,199 company matches for net zero design 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 matchLa Garenne-colombes, FranceHQ recorded Nov 6, 202610001+11,810 contacts →

Exact match

“Les activités Infrastructures Energétiques Locales d’ENGIE accompagnent les collectivités, les industries et le secteur du bâtiment sur la voie de la décarbonation.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
2Exact matchSeattle, WA, United StatesHQ recorded Nov 6, 20261,001-5,0002,347 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 · Nov 6, 2026 · View company records in RevenueBase
3Exact 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
4Exact matchOakland, CA, United StatesHQ recorded Nov 6, 2026201-500815 contacts →

Exact match

“Our mission is simple - to combat climate change through market-based, cost-effective energy, carbon, and water management solutions that make big impacts.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
5Exact matchLondon, United Arab EmiratesHQ recorded Nov 6, 2026201-500427 contacts →

Exact match

“AESG is an international Consultancy, Engineering and Advisory firm committed to driving sustainability in the built environment and beyond.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
6Exact matchMontréal, ON, CanadaHQ recorded Nov 6, 2026201-500381 contacts →

Exact match

“Architectes | Créateurs de changement Depuis plus de 60 ans, nous visons à redessiner l’avenir à travers la conception d’espaces de vie et de possibilités.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
7Exact matchBirmingham, United KingdomHQ recorded Nov 6, 2026201-500346 contacts →

Exact match

“Climate change is without a doubt the greatest challenge we face in these times.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
8Exact matchBurnaby, WA, CanadaHQ recorded Nov 6, 2026201-500345 contacts →

Exact match

“RDH is a multidisciplinary consulting firm specializing in building performance, durability, and resilience.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
9Exact 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
10Exact matchNyon, SwitzerlandHQ recorded Nov 6, 202651-200281 contacts →

Exact match

“SCB is a low carbon market leader providing bespoke solutions to help customers achieve their climate goals, carbon neutrality and net-zero commitments.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
11Exact matchStoke On Trent, United KingdomHQ recorded Nov 6, 2026501-1,000226 contacts →

Exact match

“Wardell Armstrong is now part of SLR which is a leading global consultancy, accelerating our ability to deliver the net zero transition and helping our clients address critical…”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
12Exact matchLondon, United KingdomHQ recorded Nov 6, 2026201-500224 contacts →

Exact match

“Max Fordham LLP is a partnership of engineers, designers and consultants, working with the built environment, to deliver a sustainable future and a thriving planet.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
13Exact matchNew York, NY, United StatesHQ recorded Nov 6, 202651-200203 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 · Nov 6, 2026 · View company records in RevenueBase
14Exact matchLytham, United KingdomHQ recorded Nov 6, 2026501-1,000196 contacts →

Exact match

“Inenco Group has been acquired by Sustainable Energy First.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
15Exact matchNew York, FL, United StatesHQ recorded Nov 6, 2026201-500196 contacts →

Exact match

“As of November of 2025, AMA Group has merged with CMTA!”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
16Exact matchIndore, IndiaHQ recorded Nov 6, 2026201-500195 contacts →

Exact match

“EKI Energy Services Ltd.(EKI), erstwhile EnKing International in the climate sector globally, is a leading Carbon Credit Developer & Supplier across the globe.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
17Exact matchShah Alam, MalaysiaHQ recorded Nov 6, 2026201-500173 contacts →

Exact match

“Incorporated in 2013, Cenergi SEA Berhad and its group of companies is a premier sustainable energy solutions company specializing in reducing carbon footprint through investment…”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
18Exact matchChilworth, United KingdomHQ recorded Nov 6, 202651-200166 contacts →

Exact match

“Zenergi supports and empowers your journey to net zero.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
19Exact matchNorwalk, CT, United StatesHQ recorded Nov 6, 202651-200147 contacts →

Exact match

“For over five decades, we’ve been at the forefront of transforming the built environment to be more energy efficient, accessible, healthy, and resilient.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
20Exact matchAmsterdam, FranceHQ recorded Nov 6, 202651-200143 contacts →

Exact match

“OTC Flow is your partner in achieving net zero emissions, providing customized solutions for your financial-environmental obligations and aspirations.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
21Exact matchLeicester, United KingdomHQ recorded Nov 6, 202651-200142 contacts →

Exact match

“Recognised as the Consultancy of the Year in 2021 by Energy Live News, Consultus delivers world-class consulting, buying and management services for Business Energy and Business…”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
22Exact matchBristol, United KingdomHQ recorded Nov 6, 202651-200135 contacts →

Exact match

“Optimised exists to accelerate the shift to a low-carbon future by making energy management work; commercially, operationally and sustainably.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
23Exact 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
24Exact matchLondon, United KingdomHQ recorded Nov 6, 202651-200128 contacts →

Exact match

“Longevity Partners is a multidisciplinary energy and sustainability consultancy.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
25Exact matchNew Hope, MN, United StatesHQ recorded Nov 6, 202651-200115 contacts →

Exact match

“Apadana was founded in 2013 by electrical and mechanical engineers who committed their expertise to delivering energy conservation and renewable energy generation solutions with a…”

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

Showing 25 of 2,199 net zero design consultants worldwide

See the full list, filter by size, metro and specialty, and access 11,941 tracked professional contacts with verified work emails. Direct dials are available where recorded.

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Net zero design consultants worldwide at a glance

As of Nov 6, 2026
33.8%Verified-email coverage
16.0Average contacts per company
1-10Median size (employees)
4.6%Largest-city concentration · London
Nov 6, 2026Page data refreshed

Companies by employee count

1-10
1,516
11-50
522
51-200
103
201-500
27
501-1,000
5
1,001-5,000
4
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 net zero design consultants are linked below.
What qualifies
Company records worldwide whose business descriptions match “net zero design 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 11,941 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.

Net zero design consultants by location

13 lists · largest first

Every Net zero design consultants 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 “net zero design consultants”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many net zero design consultants are there worldwide?

RevenueBase identified 2,199 company matches for net zero design 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?

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

Which country has the most net zero design consultants?

The United Kingdom leads with 371 companies, followed by the United States (367) and Germany (132). Every net zero design consultants list by country and city is linked on this page.

Which city has the most net zero design consultants?

London leads with 101 company records, followed by New York (23) and Toronto (18).

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 11,941 professional contacts with verified work emails tracked across these 2,199 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.