Company lists · Data refreshed October 2026

Top 25 Impact measurement consulting firms worldwide

Name: Impact measurement consulting firms worldwide
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Oct 1, 2026 17,260 companies tracked

RevenueBase identified 17,260 company matches for impact measurement consulting firms worldwide as of October 2026 and tracks 142,705 professional contacts across them, including 45,606 with verified work emails. The United States is the largest market and London the largest hub.

This list covers company matches for impact measurement consulting 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 October 1, 2026. Country and city lists for impact measurement consulting 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 Oct 1, 2026 How this list was built

17,260Companies

142,705Contacts tracked

45,606Verified emails

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The 25 largest impact measurement consulting firms worldwide

Ranked by team size

Top 25 of 17,260 company matches for impact measurement consulting firms worldwide, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Oct 1, 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	ERM	Exact match	London, United KingdomHQ recorded Oct 1, 2026	5,001-10,000	9,119 contacts →
	Exact match “Sustainability is our business.” Recorded in the RevenueBase company graph · Oct 1, 2026 · View company records in RevenueBase
2	Kearney	Exact match	Chicago, IL, United StatesHQ recorded Oct 1, 2026	5,001-10,000	6,978 contacts →
	Exact match “As one of the original firms, we’ve never lost sight of the fact that consulting is a people business.” Recorded in the RevenueBase company graph · Oct 1, 2026 · View company records in RevenueBase
3	Bank Of The West	Exact match	Chicago, IL, United StatesHQ recorded Oct 1, 2026	n/a	4,751 contacts →
	Exact match “We help businesses and nonprofits grow, communicate, and succeed, professionally and affordably.” Recorded in the RevenueBase company graph · Oct 1, 2026 · View company records in RevenueBase
4	SLR Consulting	Exact match	London, United KingdomHQ recorded Oct 1, 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 · Oct 1, 2026 · View company records in RevenueBase
5	BDO Nederland	Exact match	Eindhoven, NetherlandsHQ recorded Oct 1, 2026	1,001-5,000	2,428 contacts →
	Exact match “At BDO, we help people and organisations achieve their sustainable future.” Recorded in the RevenueBase company graph · Oct 1, 2026 · View company records in RevenueBase
6	FROG	Exact match	San Francisco, CA, United StatesHQ recorded Oct 1, 2026	1,001-5,000	1,727 contacts →
	Exact match “frog is the reinvention and experience partner for the eco-digital era.” Recorded in the RevenueBase company graph · Oct 1, 2026 · View company records in RevenueBase
7	Swca Environmental Consultants	Exact match	Phoenix, AZ, United StatesHQ recorded Oct 1, 2026	1,001-5,000	1,629 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 · Oct 1, 2026 · View company records in RevenueBase
8	IPE Global Limited	Exact match	New Delhi, IndiaHQ recorded Oct 1, 2026	501-1,000	1,322 contacts →
	Exact match “Headquartered in India with six international offices in Cambodia, Ethiopia, Kenya, the Philippines, Germany and the United Kingdom, IPE Global Group offers a range of integrated…” Recorded in the RevenueBase company graph · Oct 1, 2026 · View company records in RevenueBase
9	Ecorys	Exact match	Rotterdam, NetherlandsHQ recorded Oct 1, 2026	201-500	831 contacts →
	Exact match “We are an international provider of research, consulting, programme management and communications services.” Recorded in the RevenueBase company graph · Oct 1, 2026 · View company records in RevenueBase
10	Mark UP	Exact match	São Paulo, BrazilHQ recorded Oct 1, 2026	n/a	809 contacts →
	Exact match “Não é o que fazemos.” Recorded in the RevenueBase company graph · Oct 1, 2026 · View company records in RevenueBase
11	Lucas Group	Exact match	Los Angeles, CA, United StatesHQ recorded Oct 1, 2026	10001+	756 contacts →
	Exact match “Ultimate Minds is a professional consulting and marketing firm dedicated to empowering businesses, nonprofits, and startups with smart, affordable, and results-driven solutions.” Recorded in the RevenueBase company graph · Oct 1, 2026 · View company records in RevenueBase
12	Environmental Science Associates	Exact match	San Francisco, CA, United StatesHQ recorded Oct 1, 2026	501-1,000	732 contacts →
	Exact match “ESA is a 100% employee-owned environmental consulting firm.” Recorded in the RevenueBase company graph · Oct 1, 2026 · View company records in RevenueBase
13	Cowater International	Exact match	Ottawa, ON, CanadaHQ recorded Oct 1, 2026	1,001-5,000	613 contacts →
	Exact match “Cowater is a global leader in management consulting services, focusing on developing and emerging economies.” Recorded in the RevenueBase company graph · Oct 1, 2026 · View company records in RevenueBase
14	ADE	Exact match	Louvain-la-neuve, BelgiumHQ recorded Oct 1, 2026	n/a	564 contacts →
	Exact match “ADE is a consultancy providing independent advice for contributing to improve public decision-making.” Recorded in the RevenueBase company graph · Oct 1, 2026 · View company records in RevenueBase
15	Diagonal	Exact match	Sao Paulo, BrazilHQ recorded Oct 1, 2026	501-1,000	527 contacts →
	Exact match “Diagonal is a pioneering socio-environmental management consultancy that helps companies, organizations and governments to raise their ESG standard and generate a positive…” Recorded in the RevenueBase company graph · Oct 1, 2026 · View company records in RevenueBase
16	Synergia Consultoria Socioambiental	Exact match	São Paulo, BrazilHQ recorded Oct 1, 2026	201-500	497 contacts →
	Exact match “We are a company specialized in pioneer socio-environmental consultancy, in which for more than 17 years have worked with the creation and execution of effective solutions to the…” Recorded in the RevenueBase company graph · Oct 1, 2026 · View company records in RevenueBase
17	Sete Soluções E Tecnologia Ambiental	Exact match	Belo Horizonte, BrazilHQ recorded Oct 1, 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 · Oct 1, 2026 · View company records in RevenueBase
18	Sattva Consulting	Exact match	Bangalore, IndiaHQ recorded Oct 1, 2026	201-500	441 contacts →
	Exact match “At Sattva Consulting, we believe meaningful change happens when people come together with a shared purpose.” Recorded in the RevenueBase company graph · Oct 1, 2026 · View company records in RevenueBase
19	AEI Consultants	Exact match	Walnut Creek, CA, United StatesHQ recorded Oct 1, 2026	201-500	433 contacts →
	Exact match “AEI Consultants provides building, environmental, land and sustainability assessment and consulting services throughout North America.” Recorded in the RevenueBase company graph · Oct 1, 2026 · View company records in RevenueBase
20	EMM Consulting PTY Limited	Exact match	St Leonards, AustraliaHQ recorded Oct 1, 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 · Oct 1, 2026 · View company records in RevenueBase
21	Delivery Associates	Exact match	London, United KingdomHQ recorded Oct 1, 2026	51-200	361 contacts →
	Exact match “We make change happen.” Recorded in the RevenueBase company graph · Oct 1, 2026 · View company records in RevenueBase
22	Genesis Analytics	Exact match	Johannesburg, South AfricaHQ recorded Oct 1, 2026	201-500	355 contacts →
	Exact match “Genesis Analytics has worked in more than 115 countries.” Recorded in the RevenueBase company graph · Oct 1, 2026 · View company records in RevenueBase
23	Triton Environmental Consultants LTD	Exact match	Vancouver, BC, CanadaHQ recorded Oct 1, 2026	201-500	351 contacts →
	Exact match “Triton Environmental Consultants knows western Canada.” Recorded in the RevenueBase company graph · Oct 1, 2026 · View company records in RevenueBase
24	Fundes	Exact match	Belén, Costa RicaHQ recorded Oct 1, 2026	51-200	334 contacts →
	Exact match “FUNDES is the leading impact consulting firm specialized in MSMEs across Latin America and the Caribbean.” Recorded in the RevenueBase company graph · Oct 1, 2026 · View company records in RevenueBase
25	LSA	Exact match	Irvine, CA, United StatesHQ recorded Oct 1, 2026	201-500	332 contacts →
	Exact match “LSA is a diversified environmental, transportation, and community planning firm that evolved from a small consulting firm.” Recorded in the RevenueBase company graph · Oct 1, 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 “impact measurement consulting 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 17,260 impact measurement consulting firms worldwide

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Impact measurement consulting firms worldwide at a glance

As of Oct 1, 2026

32.0%Verified-email coverage

8.3Average contacts per company

1-10Median size (employees)

2.5%Largest-city concentration · London

Oct 1, 2026Page data refreshed

Companies by employee count

1-10

13,375

11-50

3,234

51-200

511

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 impact measurement consulting firms are linked below.
What qualifies: Company records worldwide whose business descriptions match “impact measurement consulting 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 45,606 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 October 1, 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.

Impact measurement consulting firms by location

107 lists · largest first

Every Impact measurement consulting 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 “impact measurement consulting firms”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many impact measurement consulting firms are there worldwide?

RevenueBase identified 17,260 company matches for impact measurement consulting firms worldwide as of October 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?

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

Which country has the most impact measurement consulting firms?

The United States leads with 2,470 companies, followed by the United Kingdom (629) and India (606). Every impact measurement consulting firms list by country and city is linked on this page.

Which city has the most impact measurement consulting firms?

London leads with 429 company records, followed by Sao Paulo (269) and Paris (262).

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 45,606 professional contacts with verified work emails tracked across these 17,260 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 October 1, 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.