Company lists · Data refreshed September 2026

Top 25 Emissions reduction consultants worldwide

Name: Emissions reduction consultants worldwide
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 19, 2026 13,918 companies tracked

RevenueBase identified 13,918 company matches for emissions reduction consultants worldwide as of September 2026 and tracks 135,067 professional contacts across them, including 46,866 with verified work emails. The United States is the largest market and London the largest hub.

This list covers company matches for emissions reduction 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 September 19, 2026. Country and city lists for emissions reduction 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 Sep 19, 2026 How this list was built

13,918Companies

135,067Contacts tracked

46,866Verified emails

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The 25 largest emissions reduction consultants worldwide

Ranked by team size

Top 25 of 13,918 company matches for emissions reduction consultants worldwide, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Sep 19, 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	Engie Solutions France	Exact match	La Garenne-colombes, FranceHQ recorded Sep 19, 2026	10001+	12,011 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 · Sep 19, 2026 · View company records in RevenueBase
2	ERM	Exact match	London, United KingdomHQ recorded Sep 19, 2026	5,001-10,000	9,119 contacts →
	Exact match “Sustainability is our business.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
3	SLR Consulting	Exact match	London, United KingdomHQ recorded Sep 19, 2026	1,001-5,000	3,848 contacts →
	Exact match “SLR is a committed partner in our clients’ sustainability journeys.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
4	Mckinstry	Exact match	Seattle, WA, United StatesHQ recorded Sep 19, 2026	1,001-5,000	2,213 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 · Sep 19, 2026 · View company records in RevenueBase
5	Clearesult	Exact match	Austin, TX, United StatesHQ recorded Sep 19, 2026	1,001-5,000	2,121 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 · Sep 19, 2026 · View company records in RevenueBase
6	OLA	Exact match	Austin, TX, United StatesHQ recorded Sep 19, 2026	n/a	1,145 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 · Sep 19, 2026 · View company records in RevenueBase
7	Anthesis Group	Exact match	London, United KingdomHQ recorded Sep 19, 2026	1,001-5,000	894 contacts →
	Exact match “Anthesis guides clients to sustainable performance.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
8	South Pole	Exact match	Zurich, SwitzerlandHQ recorded Sep 19, 2026	501-1,000	811 contacts →
	Exact match “South Pole is the world's leading carbon asset developer and climate consultancy.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
9	Energy Solutions	Exact match	Oakland, CA, United StatesHQ recorded Sep 19, 2026	201-500	772 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 · Sep 19, 2026 · View company records in RevenueBase
10	RWDI	Exact match	Guelph, ON, CanadaHQ recorded Sep 19, 2026	501-1,000	737 contacts →
	Exact match “We are a leading global climate and performance engineering consulting firm dedicated to creating harmony between the built and natural world.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
11	Inerco	Exact match	Sevilla, SpainHQ recorded Sep 19, 2026	1,001-5,000	688 contacts →
	Exact match “INERCO, with 30 years of experience, offers comprehensive services and develops advanced technologies that contribute to sustainable industrial development, acting as a leader in…” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
12	Uniqus Consultech INC	Exact match	San Jose, CA, United StatesHQ recorded Sep 19, 2026	501-1,000	675 contacts →
	Exact match “Uniqus Consultech is an AI and global tech-enabled consulting company that specializes in Accounting & Reporting Consulting, Governance, Risk & Compliance, Sustainability &…” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
13	Ricardo PLC	Exact match	London, United KingdomHQ recorded Sep 19, 2026	1,001-5,000	670 contacts →
	Exact match “Click the 'Follow' button and explore careers at Ricardo on our 'Jobs' and 'Life' tabs and at careers.ricardo.com.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
14	E CO	Exact match	London, United KingdomHQ recorded Sep 19, 2026	n/a	621 contacts →
	Exact match “For over 26 years, our consultants have been supporting and guiding our clients to achieve low-carbon climate-resilient development.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
15	ACT Group	Exact match	Amsterdam, NetherlandsHQ recorded Sep 19, 2026	501-1,000	556 contacts →
	Exact match “As the leading environmental solutions partner for organizations globally, ACT helps its partners meet increasing environmental action and disclosure expectations from regulators…” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
16	ADP Consulting	Exact match	Melbourne, AustraliaHQ recorded Sep 19, 2026	201-500	468 contacts →
	Exact match “ADP Consulting, an Ayesa company, is a sustainability-led engineering consultancy on a quest to inspire a better world through influence and design.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
17	Sete Soluções E Tecnologia Ambiental	Exact match	Belo Horizonte, BrazilHQ recorded Sep 19, 2026	501-1,000	448 contacts →
	Exact match “Somos uma das maiores consultorias em meio ambiente do Brasil, fundada em 1997, contando, hoje, com uma equipe técnica multidisciplinar permanente, que congrega profissionais das…” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
18	Greenflex	Exact match	Paris, FranceHQ recorded Sep 19, 2026	501-1,000	390 contacts →
	Exact match “Since 2009, GreenFlex has been a key partner in the energy, environmental and societal transformation of organizations, enabling them to change their trajectory towards an economy…” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
19	TRIO	Exact match	Irvine, CA, United StatesHQ recorded Sep 19, 2026	201-500	383 contacts →
	Exact match “We are Trio – built from Edison Energy, Alfa Energy, and Altenex Energy.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
20	Climatepartner	Exact match	München, GermanyHQ recorded Sep 19, 2026	501-1,000	376 contacts →
	Exact match “ClimatePartner makes climate action valuable for every company at any stage of their journey.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
21	P2s	Exact match	Long Beach, CA, United StatesHQ recorded Sep 19, 2026	201-500	375 contacts →
	Exact match “P2S has brought forward-thinking, sustainable engineering solutions to California, the Pacific Northwest, and beyond, for over 30 years.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
22	AESG	Exact match	London, United Arab EmiratesHQ recorded Sep 19, 2026	201-500	373 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 · Sep 19, 2026 · View company records in RevenueBase
23	EMM Consulting PTY Limited	Exact match	St Leonards, AustraliaHQ recorded Sep 19, 2026	201-500	361 contacts →
	Exact match “At EMM, we believe that a sustainable future is achievable, and we are dedicated to helping our clients and the community make it a reality.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
24	Triton Environmental Consultants LTD	Exact match	Vancouver, BC, CanadaHQ recorded Sep 19, 2026	201-500	351 contacts →
	Exact match “Triton Environmental Consultants knows western Canada.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
25	NUS Consulting Group	Exact match	Park Ridge, NJ, United StatesHQ recorded Sep 19, 2026	201-500	336 contacts →
	Exact match “National Utility Service, Inc.” Recorded in the RevenueBase company graph · Sep 19, 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 “emissions reduction consultants”. 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 13,918 emissions reduction consultants worldwide

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Emissions reduction consultants worldwide at a glance

As of Sep 19, 2026

34.7%Verified-email coverage

9.7Average contacts per company

1-10Median size (employees)

2.5%Largest-city concentration · London

Sep 19, 2026Page data refreshed

Companies by employee count

1-10

10,285

11-50

2,941

51-200

497

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 emissions reduction consultants are linked below.
What qualifies: Company records worldwide whose business descriptions match “emissions reduction 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 46,866 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 September 19, 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.

Emissions reduction consultants by location

69 lists · largest first

Every Emissions reduction 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 “emissions reduction consultants”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many emissions reduction consultants are there worldwide?

RevenueBase identified 13,918 company matches for emissions reduction consultants worldwide as of September 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 emissions reduction consultants?

The United States leads with 1,491 companies, followed by Brazil (1,032) and the United Kingdom (1,006). Every emissions reduction consultants list by country and city is linked on this page.

Which city has the most emissions reduction consultants?

London leads with 341 company records, followed by Paris (205) and Sao Paulo (205).

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 46,866 professional contacts with verified work emails tracked across these 13,918 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 September 19, 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.