Company lists · Data refreshed September 2026

Top 25 International nonprofit consultants based in the United States

Name: International nonprofit consultants based in the United States
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 28, 2026 3,874 companies tracked

RevenueBase identified 3,874 international nonprofit consultants headquartered in the United States as of September 2026 and tracks 23,973 professional contacts across them, including 8,199 with verified work emails. New York is the largest hub.

This list covers international nonprofit consultants headquartered in the United States, 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.

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

3,874Companies

23,973Contacts tracked

8,199Verified emails

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The 25 largest international nonprofit consultants based in the United States

Ranked by team size

Top 25 of 3,874 international nonprofit consultants based in the United States, 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	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
2	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
3	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
4	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
5	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
6	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
7	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
8	TCC Group	Indirect evidence	New York, NY, United StatesHQ checked Sep 28, 2026	n/a	232 contacts →
	Indirect evidence “TCC Group collaborates with leaders to solve complex social problems.” Source: RevenueBase Database · checked Sep 28, 2026
9	Arabella Advisors	Partial evidence	Washington, DC, United StatesHQ checked Sep 28, 2026	201-500	227 contacts →
	Partial evidence “Arabella Advisors is a professional services firm that provides administrative, operational, and strategic support to nonprofits, foundations, and individual donors.” Source: RevenueBase Database · checked Sep 28, 2026
10	Near East Foundation	Partial evidence	Syracuse, NY, United StatesHQ checked Sep 28, 2026	51-200	220 contacts →
	Partial evidence “Near East Foundation is a global leader and trusted partner, bringing international expertise, innovative programs and long-term commitment to conflict and crisis-affected…” Source: RevenueBase Database · checked Sep 28, 2026
11	Nonprofit Finance Fund	Partial evidence	New York, NY, United StatesHQ checked Sep 28, 2026	51-200	212 contacts →
	Partial evidence “Financing for nonprofits https://nff.org/our-work/financing/#Consulting for nonprofits https://nff.org/our-work/consulting/#Partnerships with funders and networks…” Source: RevenueBase Database · checked Sep 28, 2026
12	M R	Indirect evidence	Washington, United StatesHQ checked Sep 28, 2026	51-200	208 contacts →
	Indirect evidence “We are M+R.” Source: RevenueBase Database · checked Sep 28, 2026
13	Global Impact	Partial evidence	Washington, DC, United StatesHQ checked Sep 28, 2026	51-200	170 contacts →
	Partial evidence “Global Impact serves as a trusted philanthropy advisor, intermediary, and nonprofit partner for greater giving.” Source: RevenueBase Database · checked Sep 28, 2026
14	Harvard Undergraduate Consulting Group	Partial evidence	Cambridge, MA, United StatesHQ checked Sep 28, 2026	51-200	144 contacts →
	Partial evidence “Harvard Undergraduate Consulting Group is a nonprofit student organization at Harvard dedicated to helping businesses grow and achieve their strategic goals.” Source: RevenueBase Database · checked Sep 28, 2026
15	The Konterra Group	Partial evidence	Washington, DC, United StatesHQ checked Sep 28, 2026	11-50	140 contacts →
	Partial evidence “At KonTerra, we support organizations that manage international development, humanitarian and emergency management operations.” Source: RevenueBase Database · checked Sep 28, 2026
16	International Advisory, Products And Systems I-Aps	Partial evidence	Alexandria, VA, United StatesHQ checked Sep 28, 2026	201-500	138 contacts →
	Partial evidence “International Advisory, Products and Systems Ltd.(i-APS) We empower organizations & communities to be partners for change.” Source: RevenueBase Database · checked Sep 28, 2026
17	Amphil	Partial evidence	Oak Park, IL, United StatesHQ checked Sep 28, 2026	51-200	136 contacts →
	Partial evidence “AmPhil exists to promote the art of civil association by helping philanthropists, charitable foundations, and nonprofit organizations grow and flourish through practical guidance…” Source: RevenueBase Database · checked Sep 28, 2026
18	The Acceleration Project	Partial evidence	Scarsdale, NY, United StatesHQ checked Sep 28, 2026	11-50	131 contacts →
	Partial evidence “The Acceleration Project (TAP) is a nonprofit organization with a mission to unlock pathways to wealth creation and economic mobility by accelerating under-resourced small…” Source: RevenueBase Database · checked Sep 28, 2026
19	BWF	Partial evidence	Usa, United StatesHQ checked Sep 28, 2026	51-200	125 contacts →
	Partial evidence “BWF Zuri is the nonprofit sector’s most comprehensive fundraising consulting company, helping organizations thrive in a rapidly changing landscape.” Source: RevenueBase Database · checked Sep 28, 2026
20	IBI	Partial evidence	Arlington, VA, United StatesHQ checked Sep 28, 2026	51-200	115 contacts →
	Partial evidence “IBI is an international economic development consulting firm whose main client is the U.S.” Source: RevenueBase Database · checked Sep 28, 2026
21	JMT Consulting	Partial evidence	Mount Juliet, TN, United StatesHQ checked Sep 28, 2026	51-200	112 contacts →
	Partial evidence “Our number one priority at JMT is to empower nonprofits to achieve their mission through optimized systems and processes.” Source: RevenueBase Database · checked Sep 28, 2026
22	Zuri Group	Partial evidence	Bend, OR, United StatesHQ checked Sep 28, 2026	51-200	106 contacts →
	Partial evidence “Zuri Group partners with nonprofit organizations to turn big ideas into reality.” Source: RevenueBase Database · checked Sep 28, 2026
23	Campbell & Company	Partial evidence	Chicago, IL, United StatesHQ checked Sep 28, 2026	51-200	102 contacts →
	Partial evidence “Campbell & Company is a national nonprofit consulting firm that helps organizations create greater impact through fundraising, communications and strategic information services.” Source: RevenueBase Database · checked Sep 28, 2026
24	Hilltop Consultants	Partial evidence	Washington, DC, United StatesHQ checked Sep 28, 2026	11-50	101 contacts →
	Partial evidence “Hilltop Consultants is a consulting organization entirely run by Georgetown University undergraduates that executes and leads 6-7 strategy consulting projects each semester for…” Source: RevenueBase Database · checked Sep 28, 2026
25	ORR Group	Indirect evidence	Washington, DC, United StatesHQ checked Sep 28, 2026	51-200	99 contacts →
	Indirect evidence “Orr Group was born out of a need for event management and fundraising support in the philanthropic sector.” 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 3,874 international nonprofit consultants based in the United States

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International nonprofit consultants based in the United States at a glance

As of Sep 28, 2026

34.2%Verified-email coverage

6.2Average contacts per company

1-10Median size (employees)

5.0%Largest-city concentration · New York

Sep 28, 2026Page data refreshed

Companies by employee count

1-10

3,353

11-50

420

51-200

201-500

501-1,000

1,001-5,000

5,001-10,000

10001+

Email recency for this list is measured worldwide rather than for United States, so it is reported there. Company counts and contact totals on this page are exact for United States, over 3,874 companies.

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.
What qualifies: Companies headquartered in the United States 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. Companies headquartered outside United States are excluded even when they keep an office there.
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, 8,199 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 metro

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 based in the United States?

RevenueBase identified 3,874 international nonprofit consultants headquartered in the United States 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?

CCS Fundraising, headquartered in New York, tops this list with the largest team on record.

Which city has the most international nonprofit consultants?

New York leads with 192 headquartered companies, followed by Washington (181) and Chicago (133).

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 8,199 verified decision-maker contacts tracked across these 3,874 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.