Company lists · Data refreshed September 2026

Top 25 International nonprofit consultants worldwide

Name: International nonprofit consultants worldwide
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 28, 2026 10,513 companies tracked

RevenueBase identified 10,513 international nonprofit consultants worldwide as of September 2026 and tracks 78,772 professional contacts across them, including 17,938 with verified work emails. The United States is the largest market and London the largest hub.

This list covers international nonprofit consultants 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 international nonprofit consultants 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

10,513Companies

78,772Contacts tracked

17,938Verified emails

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The 25 largest international nonprofit consultants worldwide

Ranked by team size

Top 25 of 10,513 international nonprofit consultants worldwide, ranked by team size, largest first. Data refreshed Sep 28, 2026. RevenueBase Smart Search rates how each company's information relates to international nonprofit consultants: 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	GFA Consulting Group Gmbh	Partial evidence	Hamburg, GermanyHQ checked Sep 28, 2026	1,001-5,000	1,382 contacts →
	Partial evidence “GFA Consulting Group is one of Europe's leading consulting firms in the field of international development cooperation.” Source: RevenueBase Database · checked Sep 28, 2026
2	IPE Global Limited	Partial evidence	New Delhi, IndiaHQ checked Sep 28, 2026	501-1,000	1,322 contacts →
	Partial evidence “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…” Source: RevenueBase Database · checked Sep 28, 2026
3	Blackmont Consulting	Indirect evidence	London, United KingdomHQ checked Sep 28, 2026	201-500	1,221 contacts →
	Indirect evidence “Blackmont Consulting provides 100% free advisory services to NGO´s, NPO´s and start-ups.” Source: RevenueBase Database · checked Sep 28, 2026
4	Ecorys	Partial evidence	Rotterdam, NetherlandsHQ checked Sep 28, 2026	201-500	831 contacts →
	Partial evidence “We are an international provider of research, consulting, programme management and communications services.” Source: RevenueBase Database · checked Sep 28, 2026
5	Adam Smith International	Partial evidence	London, United KingdomHQ checked Sep 28, 2026	n/a	825 contacts →
	Partial evidence “Adam Smith International is a global advisory company that works locally to transform lives by making economies stronger, societies more stable, and governments more effective.” Source: RevenueBase Database · checked Sep 28, 2026
6	NGO Recruit Partners	Indirect evidence	NetherlandsHQ checked Sep 28, 2026	n/a	796 contacts →
	Indirect evidence “NGO Recruit Partners is a global executive search and recruitment firm serving the non-profit, sustainable development, and social impact sector.” Source: RevenueBase Database · checked Sep 28, 2026
7	CCS Fundraising	Indirect evidence	New York, NY, United StatesHQ checked Sep 28, 2026	501-1,000	728 contacts →
	Indirect evidence “For over 75 years, CCS Fundraising has empowered many of the world’s greatest organizations to advance some of the most important causes in history.” Source: RevenueBase Database · checked Sep 28, 2026
8	Niras International Consulting	Partial evidence	Copenhagen, DenmarkHQ checked Sep 28, 2026	201-500	667 contacts →
	Partial evidence “NIRAS International Development Consulting is one of Europe's largest development consulting firms.” Source: RevenueBase Database · checked Sep 28, 2026
9	Global Research And Consulting Group	Partial evidence	Philadelphia, PA, United StatesHQ checked Sep 28, 2026	1,001-5,000	643 contacts →
	Partial evidence “GRC Group (Global Research & Consulting) is a 501(c)(3) nonprofit with over active students from various cultural and academic backgrounds.” Source: RevenueBase Database · checked Sep 28, 2026
10	Finn Church AID	Indirect evidence	Helsinki, FinlandHQ checked Sep 28, 2026	1,001-5,000	571 contacts →
	Indirect evidence “We believe in everyone’s right to peace, quality education and sustainable livelihoods, and we work with the most vulnerable people, regardless of their religious beliefs, ethnic…” Source: RevenueBase Database · checked Sep 28, 2026
11	ADE	Partial evidence	Louvain-la-neuve, BelgiumHQ checked Sep 28, 2026	n/a	564 contacts →
	Partial evidence “ADE is a consultancy providing independent advice for contributing to improve public decision-making.” Source: RevenueBase Database · checked Sep 28, 2026
12	FSG	Partial evidence	Boston, MA, United StatesHQ checked Sep 28, 2026	51-200	517 contacts →
	Partial evidence “At FSG, we are a global nonprofit consulting firm committed to advancing equitable systems change.” Source: RevenueBase Database · checked Sep 28, 2026
13	GVA	Indirect evidence	Paris, FranceHQ checked Sep 28, 2026	51-200	499 contacts →
	Indirect evidence “Créé en 1975, GVA est composé de 80 personnes, pour près de 10 millions de chiffre d’affaires.” Source: RevenueBase Database · checked Sep 28, 2026
14	The Bridgespan Group	Partial evidence	Boston, MA, United StatesHQ checked Sep 28, 2026	201-500	443 contacts →
	Partial evidence “The Bridgespan Group is a global nonprofit that strives to make the world more equitable and just.” Source: RevenueBase Database · checked Sep 28, 2026
15	Sattva Consulting	Indirect evidence	Bangalore, IndiaHQ checked Sep 28, 2026	201-500	441 contacts →
	Indirect evidence “At Sattva Consulting, we believe meaningful change happens when people come together with a shared purpose.” Source: RevenueBase Database · checked Sep 28, 2026
16	Particip Gmbh	Strong evidence	Freiburg, GermanyHQ checked Sep 28, 2026	51-200	386 contacts →
	Strong evidence “Particip GmbH - Your Partner in Change was founded in 1989 and is now an independent, internationally-recognised consultancy company, offering the expertise and the know-how…” Source: RevenueBase Database · checked Sep 28, 2026
17	ECTI	Indirect evidence	Paris, FranceHQ checked Sep 28, 2026	n/a	375 contacts →
	Indirect evidence “Fondée en 1974, ECTI est une association de bénévolat de compétences reconnue d’utilité publique.” Source: RevenueBase Database · checked Sep 28, 2026
18	Delivery Associates	Indirect evidence	London, United KingdomHQ checked Sep 28, 2026	51-200	361 contacts →
	Indirect evidence “We make change happen.” Source: RevenueBase Database · checked Sep 28, 2026
19	BVNG	Indirect evidence	Groningen, NetherlandsHQ checked Sep 28, 2026	501-1,000	335 contacts →
	Indirect evidence “Samen vooruit Samen met onze professionals maken we het verschil.” Source: RevenueBase Database · checked Sep 28, 2026
20	INOVA	Indirect evidence	Matosinhos, PortugalHQ checked Sep 28, 2026	51-200	320 contacts →
	Indirect evidence “INOVA+ is a leading innovation consulting company with a vast experience helping organizations across diverse sectors develop innovative projects.” Source: RevenueBase Database · checked Sep 28, 2026
21	Nonprofit Hr, Powered By Onedigital	Partial evidence	Washington, DC, United StatesHQ checked Sep 28, 2026	10001+	300 contacts →
	Partial evidence “Nonprofit HR was founded with one goal in mind: to strengthen the social impact sector by strengthening its people.” Source: RevenueBase Database · checked Sep 28, 2026
22	JCA	Partial evidence	Chicago, IL, United StatesHQ checked Sep 28, 2026	n/a	265 contacts →
	Partial evidence “JCA is the first and foremost independent consulting firm dedicated to addressing the technology and operational needs of nonprofits.” Source: RevenueBase Database · checked Sep 28, 2026
23	SSA Consultants	Indirect evidence	Baton Rouge, LA, United StatesHQ checked Sep 28, 2026	n/a	258 contacts →
	Indirect evidence “We are partners and advisors of leading organizations and governments, bound to and inspired by a mission of helping our clients improve their performance.” Source: RevenueBase Database · checked Sep 28, 2026
24	NGO Management Association	Indirect evidence	Geneva, SwitzerlandHQ checked Sep 28, 2026	n/a	258 contacts →
	Indirect evidence “NGO Management Association (NMA) is a Geneva-based non-profit committed to enhancing the management capabilities of organisations tackling today's most pressing development and…” Source: RevenueBase Database · checked Sep 28, 2026
25	NTU International A S	Indirect evidence	Aalborg, DenmarkHQ checked Sep 28, 2026	201-500	246 contacts →
	Indirect evidence “Since 2007, we have delivered sustainable development projects and provided advisory services within engineering, policy, economics, and social fields.” 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: international nonprofit consultants. 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 international nonprofit consultants.
Partial evidence: Its own public description names part of international nonprofit consultants, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name international nonprofit consultants. 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 10,513 international nonprofit consultants worldwide

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International nonprofit consultants worldwide at a glance

As of Sep 28, 2026

22.8%Verified-email coverage

7.5Average contacts per company

1-10Median size (employees)

1.9%Largest-city concentration · London

Sep 28, 2026Page data refreshed

Companies by employee count

1-10

8,437

11-50

1,652

51-200

324

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 international nonprofit consultants, 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 international nonprofit consultants are linked below.
What qualifies: Companies worldwide whose own description of what they do matches “international nonprofit consultants”. 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 international nonprofit consultants), 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 international nonprofit consultants, 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, 17,938 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.

International nonprofit consultants by location

57 lists · largest first

Every International nonprofit 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 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 international nonprofit consultants, 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 international nonprofit consultants are there worldwide?

RevenueBase identified 10,513 international nonprofit consultants 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?

GFA Consulting Group Gmbh, headquartered in Hamburg, tops this list with the largest team on record.

Which country has the most international nonprofit consultants?

The United States leads with 3,874 companies, followed by the United Kingdom (440) and Canada (412). Every international nonprofit consultants list by country and city is linked on this page.

Which city has the most international nonprofit consultants?

London leads with 204 headquartered companies, followed by New York (192) and Washington (181).

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 17,938 verified decision-maker contacts tracked across these 10,513 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.