Company lists · Data refreshed November 2026

Top 25 Environmental communications firms worldwide

Name: Environmental communications firms worldwide
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Nov 6, 2026 18,951 companies tracked

RevenueBase identified 18,951 company matches for environmental communications firms worldwide as of November 2026 and tracks 183,822 professional contacts across them, including 60,170 with verified work emails. The United States is the largest market and London the largest hub.

This list covers company matches for environmental communications firms 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 environmental communications firms 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

18,951Companies

183,822Contacts tracked

60,170Verified emails

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The 25 largest environmental communications firms worldwide

Ranked by team size

Top 25 of 18,951 company matches for environmental communications firms 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.
#	Company	RevenueBase SmartSearch	Headquarters	Employees	Contacts
1	Weber Shandwick	Exact match	New York, NY, United StatesHQ recorded Nov 6, 2026	1,001-5,000	4,318 contacts →
	Exact match “Weber Shandwick is the earned-first global communications agency.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
2	Adfactors PR	Exact match	Mumbai, IndiaHQ recorded Nov 6, 2026	1,001-5,000	2,056 contacts →
	Exact match “Adfactors PR, founded in 1997, is India's largest Public Relations firm.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
3	Improfit	Exact match	Montevideo, UruguayHQ recorded Nov 6, 2026	n/a	1,851 contacts →
	Exact match “Improfit es una agencia de comunicación corporativa y organizacional fundada en en Montevideo, Uruguay.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
4	Swca Environmental Consultants	Exact match	Phoenix, MA, United StatesHQ recorded Nov 6, 2026	1,001-5,000	1,695 contacts →
	Exact match “Founded on a commitment to sound science and creative solutions, SWCA is a leader in environmental and management consulting services.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
5	DGE Danmark	Exact match	Højbjerg, DenmarkHQ recorded Nov 6, 2026	n/a	1,192 contacts →
	Exact match “Miljø er vores kernekompetence og vores ansvar.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
6	Alliance Technical Group	Exact match	Decatur, PA, United StatesHQ recorded Nov 6, 2026	1,001-5,000	1,088 contacts →
	Exact match “Alliance is a new kind of environmental services company-powered by innovation, focused on service, and committed to client success.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
7	Ruder Finn	Exact match	New York, NY, United StatesHQ recorded Nov 6, 2026	1,001-5,000	942 contacts →
	Exact match “Ruder Finn is one of the world’s largest global independent integrated marketing and communications agencies, leading at the intersection of technology, human creativity, and…” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
8	Zeno Group	Exact match	New York, NY, United StatesHQ recorded Nov 6, 2026	501-1,000	930 contacts →
	Exact match “Zeno Group is the fiercely independent and global, integrated communications agency, born from PR.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
9	Montrose Environmental Group	Exact match	Little Rock, AR, United StatesHQ recorded Nov 6, 2026	1,001-5,000	861 contacts →
	Exact match “Onterris (formerly Montrose Environmental Group) was one of the first to see environmental responsibility as not just an imperative but as a strategic asset.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
10	Environmental Science Associates	Exact match	San Francisco, OR, United StatesHQ recorded Nov 6, 2026	501-1,000	748 contacts →
	Exact match “ESA is a 100% employee-owned environmental consulting firm.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
11	Atrevia	Exact match	Madrid, SpainHQ recorded Nov 6, 2026	501-1,000	656 contacts →
	Exact match Recorded description not available. Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
12	Antea Group USA	Exact match	St. Paul, MD, United StatesHQ recorded Nov 6, 2026	1,001-5,000	649 contacts →
	Exact match “Antea Group is an international engineering and environmental consulting firm specializing in full-service solutions in the fields of environment, health and safety, and…” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
13	Prosek Partners	Exact match	New York, United StatesHQ recorded Nov 6, 2026	201-500	592 contacts →
	Exact match “Prosek Partners builds – and protects – the top brands in business.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
14	Rincon Consultants	Exact match	Ventura, CA, United StatesHQ recorded Nov 6, 2026	501-1,000	509 contacts →
	Exact match “Rincon Consultants is a multidisciplinary environmental, planning, and advisory firm.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
15	Inpress Porter Novelli	Exact match	Sao Paulo, BrazilHQ recorded Nov 6, 2026	201-500	507 contacts →
	Exact match “A InPress Porter Novelli é uma agência de comunicação full service, com mais de 150 clientes nos segmentos corporativo, consumo, mídia e entretenimento, saúde, tecnologia…” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
16	VLS Environmental Solutions, LLC	Exact match	Houston, TX, United StatesHQ recorded Nov 6, 2026	1,001-5,000	506 contacts →
	Exact match “At VLS, we address your company’s most significant hurdles with waste management and compliance through sustainable solutions.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
17	BPR	Exact match	United StatesHQ recorded Nov 6, 2026	n/a	499 contacts →
	Exact match “BPR is a boutique communications firm speicalizing in the energy industry.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
18	Vertex Resource Group LTD	Exact match	Sherwood Park, AB, CanadaHQ recorded Nov 6, 2026	1,001-5,000	491 contacts →
	Exact match “Since 1962, Vertex has been a leading North American provider of environmental services.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
19	Avian We	Exact match	New Delhi, IndiaHQ recorded Nov 6, 2026	201-500	488 contacts →
	Exact match “About Avian We.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
20	ROUX	Exact match	Islandia, NY, United StatesHQ recorded Nov 6, 2026	201-500	474 contacts →
	Exact match “The Roux organization applies sophisticated scientific, technical, and managerial resources to develop and implement effective, efficient, and sustainable solutions to our…” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
21	Groundwater & Environmental Services, INC	Exact match	Wall Township, VA, United StatesHQ recorded Nov 6, 2026	201-500	470 contacts →
	Exact match “We are Groundwater & Environmental Services, Inc, better known as GES.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
22	Sete Soluções E Tecnologia Ambiental	Exact match	Belo Horizonte, BrazilHQ recorded Nov 6, 2026	501-1,000	466 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 · Nov 6, 2026 · View company records in RevenueBase
23	Emperor	Exact match	Aldgate, United KingdomHQ recorded Nov 6, 2026	201-500	445 contacts →
	Exact match “Emperor is one of the UK's leading employee-owned creative communications agencies.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
24	CFC BIG Ideas	Exact match	Kyiv, UkraineHQ recorded Nov 6, 2026	n/a	415 contacts →
	Exact match “СFC Big Ideas is a communications agency specializing in international projects, government relations & PR.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
25	Mikeworldwide	Exact match	New York, NY, United StatesHQ recorded Nov 6, 2026	51-200	403 contacts →
	Exact match “MWW is one of the world’s leading independent, integrated PR agencies with offices across the US and UK, and a global network of partners.” Recorded in the RevenueBase company graph · Nov 6, 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 “environmental communications firms”. 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 18,951 environmental communications firms worldwide

See the full list, filter by size, metro and specialty, and access 60,170 tracked professional contacts with verified work emails. Direct dials are available where recorded.

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Environmental communications firms worldwide at a glance

As of Nov 6, 2026

32.7%Verified-email coverage

9.7Average contacts per company

1-10Median size (employees)

2.3%Largest-city concentration · London

Nov 6, 2026Page data refreshed

Companies by employee count

1-10

13,497

11-50

4,400

51-200

741

201-500

113

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 environmental communications firms are linked below.
What qualifies: Company records worldwide whose business descriptions match “environmental communications firms” 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 60,170 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.

Environmental communications firms by location

129 lists · largest first

Every Environmental communications firms 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 “environmental communications firms”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many environmental communications firms are there worldwide?

RevenueBase identified 18,951 company matches for environmental communications firms 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?

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

Which country has the most environmental communications firms?

The United States leads with 4,657 companies, followed by Brazil (1,517) and the United Kingdom (1,119). Every environmental communications firms list by country and city is linked on this page.

Which city has the most environmental communications firms?

London leads with 428 company records, followed by Sao Paulo (316) and New York (290).

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 60,170 professional contacts with verified work emails tracked across these 18,951 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.