Company lists · Data refreshed September 2026

Top 25 Environmental pr firms worldwide

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

Compiled by the RevenueBase Data Team Data refreshed Sep 28, 2026 5,560 companies tracked

RevenueBase identified 5,560 environmental pr firms worldwide as of September 2026 and tracks 38,856 professional contacts across them, including 11,728 with verified work emails. The United States is the largest market and London the largest hub.

This list covers environmental pr firms worldwide, matched on what each company actually does as described in its own words. Ranked by team size, largest first. Every row shows the company's own description, its RevenueBase Smart Search rating, and when it was last checked. Data refreshed September 28, 2026. Country and city lists for environmental pr firms follow the table.

Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase Smart Search, 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 HQ checked on every row RevenueBase Smart Search rating on every row Refreshed Sep 28, 2026 86% judged on-target in blind review

5,560Companies

38,856Contacts tracked

11,728Verified emails

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The 25 largest environmental pr firms worldwide

Ranked by team size

Top 25 of 5,560 environmental pr firms worldwide, ranked by team size, largest first. Data refreshed Sep 28, 2026. RevenueBase Smart Search rates how each company's information relates to environmental pr firms: strong evidence (its own description names it), partial (names part of it), indirect (matched on the rest of its profile rather than the description shown). Click a contact count to view that company's people.
#	Company	RevenueBase Smart Search	Headquarters	Employees	Contacts
1	Adfactors PR	Partial evidence	Mumbai, IndiaHQ checked Sep 28, 2026	1,001-5,000	1,920 contacts →
	Partial evidence “Adfactors PR, founded in 1997, is India's largest Public Relations firm.” Source: RevenueBase Database · checked Sep 28, 2026
2	ROUX	Partial evidence	Islandia, NY, United StatesHQ checked Sep 28, 2026	201-500	433 contacts →
	Partial evidence “Founded 40 years ago, Roux is recognized for being a highly effective, client-focused environmental consulting and management firm.” Source: RevenueBase Database · checked Sep 28, 2026
3	Mikeworldwide	Partial evidence	New York, NY, United StatesHQ checked Sep 28, 2026	51-200	381 contacts →
	Partial evidence “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.” Source: RevenueBase Database · checked Sep 28, 2026
4	DKC	Indirect evidence	New York, NY, United StatesHQ checked Sep 28, 2026	201-500	349 contacts →
	Indirect evidence “DKC is a full service public relations, marketing and government affairs firm and part of the Acceleration Community of Companies, Based in New York City, and with offices in Los…” Source: RevenueBase Database · checked Sep 28, 2026
5	Kindred	Indirect evidence	London, United KingdomHQ checked Sep 28, 2026	n/a	348 contacts →
	Indirect evidence “We are Kindred.” Source: RevenueBase Database · checked Sep 28, 2026
6	ROMAN	Indirect evidence	Barcelona, SpainHQ checked Sep 28, 2026	51-200	315 contacts →
	Indirect evidence “Roman is a communication and Public Relations cross sector agency with 30 years’ experience.” Source: RevenueBase Database · checked Sep 28, 2026
7	V360 Group	Partial evidence	Okhla, IndiaHQ checked Sep 28, 2026	201-500	267 contacts →
	Partial evidence “Value 360 Communications is India’s first PR Company with a focussed approach for early stage business.” Source: RevenueBase Database · checked Sep 28, 2026
8	MERCK	Indirect evidence	SpainHQ checked Sep 28, 2026	10001+	264 contacts →
	Indirect evidence “Departamento de Comunicación Externa” Source: RevenueBase Database · checked Sep 28, 2026
9	GAP Ssma	Indirect evidence	Goiânia, BrazilHQ checked Sep 28, 2026	201-500	234 contacts →
	Indirect evidence “A GAP Ambiental oferece serviços para pequenas, médias e grandes empresas em diversas áreas que vão desde o licenciamento ao acompanhamento da execução de projetos.” Source: RevenueBase Database · checked Sep 28, 2026
10	Metiri Group	Partial evidence	Clovis, CA, United StatesHQ checked Sep 28, 2026	n/a	233 contacts →
	Partial evidence “Appl Inc is an environmental services company based out of 908 N Temperance Ave, Clovis, CA, United States.” Source: RevenueBase Database · checked Sep 28, 2026
11	CDN Comunicação	Partial evidence	São Paulo, BrazilHQ checked Sep 28, 2026	201-500	209 contacts →
	Partial evidence “Somos “The PR PowerHouse”, uma verdadeira potência em PR e todas as suas disciplinas.” Source: RevenueBase Database · checked Sep 28, 2026
12	SVM PR And Marketing	Indirect evidence	Providence, RI, United StatesHQ checked Sep 28, 2026	n/a	206 contacts →
	Indirect evidence “Increasing visibility, relevance and value.” Source: RevenueBase Database · checked Sep 28, 2026
13	Helix Environmental Planning, INC	Partial evidence	La Mesa, CA, United StatesHQ checked Sep 28, 2026	201-500	199 contacts →
	Partial evidence “HELIX Environmental Planning, Inc.(HELIX) is an employee-owned, environmental consulting firm established in 1991 and with offices in San Diego, Los Angeles, Orange, Riverside…” Source: RevenueBase Database · checked Sep 28, 2026
14	GAC	Indirect evidence	Santiago, ChileHQ checked Sep 28, 2026	51-200	195 contacts →
	Indirect evidence “Gestión Ambiental Consultores S.A.(GAC) es una empresa de consultoría ambiental fundada en 1991 que presta servicios en distintas áreas de la gestión ambiental para los…” Source: RevenueBase Database · checked Sep 28, 2026
15	PR Professionals	Partial evidence	Gurgaon, IndiaHQ checked Sep 28, 2026	201-500	186 contacts →
	Partial evidence “PR Professionals is an innovative PR Agency which understands the importance of relationship building, consumer needs and publicity.” Source: RevenueBase Database · checked Sep 28, 2026
16	Stirrup Communication Consultants	Indirect evidence	Mumbai, IndiaHQ checked Sep 28, 2026	51-200	176 contacts →
	Indirect evidence “Stirrup Communication Consultants Pvt Ltd (Stirrup), previously known as AICL Communications Limited, is a corporate reporting, ESG, stakeholder communications consultancy.” Source: RevenueBase Database · checked Sep 28, 2026
17	Centro DE Medicina Nuclear DA Guanabara Ltda	Indirect evidence	Rio De Janeiro, BrazilHQ checked Sep 28, 2026	51-200	160 contacts →
	Indirect evidence “Centro de Medicina” Source: RevenueBase Database · checked Sep 28, 2026
18	Media Mantra Global	Indirect evidence	Gurgaon, IndiaHQ checked Sep 28, 2026	51-200	152 contacts →
	Indirect evidence “What started in 2012 as the vision of a group of young entrepreneurs has grown into India's first independent integrated communications agency with a presence across.” Source: RevenueBase Database · checked Sep 28, 2026
19	Ince PTY LTD	Indirect evidence	Sandton, South AfricaHQ checked Sep 28, 2026	51-200	149 contacts →
	Indirect evidence “A trusted leader in investor marketing and stakeholder communications for over a century, we redefine excellence through strategic, integrated, innovative solutions for listed…” Source: RevenueBase Database · checked Sep 28, 2026
20	Quest Resource Management Group, A Qrhc Company Nasdaq Qrhc	Partial evidence	The Colony, TX, United StatesHQ checked Sep 28, 2026	51-200	147 contacts →
	Partial evidence “Quest Resource Management Group, a subsidiary of Quest Resource Holding Corporation (Nasdaq: QRHC), is a full-service environmental consulting and management company headquartered…” Source: RevenueBase Database · checked Sep 28, 2026
21	Cognito	Indirect evidence	London, United KingdomHQ checked Sep 28, 2026	51-200	131 contacts →
	Indirect evidence “Cognito is the global communications agency for finance, technology and the climate transition.” Source: RevenueBase Database · checked Sep 28, 2026
22	The Practice	Indirect evidence	Bangalore, IndiaHQ checked Sep 28, 2026	51-200	124 contacts →
	Indirect evidence “For 25 years, The PRactice has been a trusted partner for businesses and institutions navigating the complexities of 21st-century market realities.” Source: RevenueBase Database · checked Sep 28, 2026
23	Bicho DO Mato Meio Ambiente Environmental Consulting	Indirect evidence	Belo Horizonte, BrazilHQ checked Sep 28, 2026	51-200	121 contacts →
	Indirect evidence “A Empresa Bicho do Mato Meio Ambiente Ltda.” Source: RevenueBase Database · checked Sep 28, 2026
24	Cascadia Consulting Group	Partial evidence	Seattle, WA, United StatesHQ checked Sep 28, 2026	51-200	110 contacts →
	Partial evidence “Cascadia Consulting Group is a majority women-owned consulting firm specializing in environmental and sustainability solutions.” Source: RevenueBase Database · checked Sep 28, 2026
25	Pulsar Advertising	Indirect evidence	Los Angeles, CA, United StatesHQ checked Sep 28, 2026	11-50	110 contacts →
	Indirect evidence “Pulsar is not your typical advertising and marketing agency.” Source: RevenueBase Database · checked Sep 28, 2026

RevenueBase Smart Search

RevenueBase Smart Search assesses information from a company’s LinkedIn profile, information supplied directly by the company, its website, and other publicly available sources. It uses that information to rate how closely the company relates to this list’s category: environmental pr firms. Every row carries its rating and the description the rating was read from, so each one can be checked rather than taken on trust.

Strong evidence: The company's own public description of its business names environmental pr firms.
Partial evidence: Its own public description names part of environmental pr firms, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name environmental pr firms. The match rests on the rest of the company's public profile rather than the one sentence quoted here, so this is the rating to check first.

RevenueBase Smart Search is how these lists are built: RevenueBase's data engine and AI assemble the companies that match a category defined in a user's own words, so a list can be about what companies actually do rather than about whichever industry code they were filed under.

Showing 25 of 5,560 environmental pr firms worldwide

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Environmental pr firms worldwide at a glance

As of Sep 28, 2026

30.2%Verified-email coverage

7.0Average contacts per company

1-10Median size (employees)

3.1%Largest-city concentration · London

Sep 28, 2026Page data refreshed

Companies by employee count

1-10

4,181

11-50

1,174

51-200

135

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

Company categories are rarely black and white. RevenueBase reads each company's own description of its business to decide whether it belongs among environmental pr firms, so some rows will be adjacent to the category rather than pure plays. The description and RevenueBase Smart Search rating on every row are there so you can check each match yourself.

Source: The RevenueBase company graph: 60 million companies and 398.9 million professional contacts resolved from primary sources, queried with RevenueBase Smart Search, the natural-language company search available to every RevenueBase user.
Coverage: Every country. Country and city lists for environmental pr firms are linked below.
What qualifies: Companies worldwide whose own description of what they do matches “environmental pr firms”. Matching reads each company's description, not its industry code or its name.
RevenueBase Smart Search: RevenueBase Smart Search is how this list is assembled and how each row is rated. RevenueBase's data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to a category defined in a user's own words. Each row is rated strong evidence (its own description names environmental pr firms), partial evidence (it names part of the category) or indirect evidence (the description shown names none of it and the match rests on the rest of the company's profile). The description supporting each rating is quoted on the row.
What we exclude: Companies whose own description does not clearly place them among environmental pr firms, and records with no verified work email.
Match quality: In blind human judging of this matching method, 86% of matched companies were on target. Expect roughly 1 in 7 rows to be adjacent to the category rather than a pure play. Every row shows the company's own description and its RevenueBase Smart Search rating so you can judge each match yourself. Read the full methodology: how the lists are built, how the judging worked, and what the figure means.
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 listed company carries at least one verified work email, 11,728 across the full list. 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 28, 2026. Lists refresh periodically as the graph is re-checked.
Corrections: Wrong category, wrong headquarters, or a company that has closed? Use “Report an issue” on any row. Reports go to the RevenueBase Data Team and feed back into the company graph.

Environmental pr firms by location

38 lists · largest first

Every Environmental pr 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 Smart Search?

RevenueBase Smart Search is how RevenueBase decides which companies belong on this list and how strongly each one fits. Its data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to the category the list is about. Each row is rated strong evidence when the company's own description names environmental pr firms, partial evidence when it names part of the category, and indirect evidence when the description shown names none of it and the match rests on the rest of the company's profile.

How many environmental pr firms are there worldwide?

RevenueBase identified 5,560 environmental pr firms worldwide as of September 2026, matched on each company's own description of what it does rather than its industry code.

What is the largest company on this list?

Adfactors PR, headquartered in Mumbai, tops this list with the largest team on record.

Which country has the most environmental pr firms?

The United States leads with 1,268 companies, followed by the United Kingdom (514) and Brazil (326). Every environmental pr firms list by country and city is linked on this page.

Which city has the most environmental pr firms?

London leads with 172 headquartered companies, followed by New York (93) and Paris (92).

How do I get contact information for these companies?

A free RevenueBase account lets you run this exact search and work the top results, verified emails and direct dials included. Upgrading unlocks all 11,728 verified decision-maker contacts tracked across these 5,560 companies.

How current is this list?

The list refreshes periodically as the company graph is re-checked. This page's figures were pulled on September 28, 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 Smart Search, 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.