Company lists · Data refreshed November 2026

Top 25 Nonprofit effectiveness organizations based in the United States

Name: Nonprofit effectiveness organizations based in the United States
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Nov 6, 2026 2,599 companies tracked

RevenueBase identified 2,599 company matches for nonprofit effectiveness organizations associated with the United States as of November 2026 and tracks 14,845 professional contacts across them, including 5,897 with verified work emails. New York is the largest hub.

This list covers company matches for nonprofit effectiveness organizations associated with the United States, 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.

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

2,599Companies

14,845Contacts tracked

5,897Verified emails

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The 25 largest nonprofit effectiveness organizations based in the United States

Ranked by team size

Top 25 of 2,599 company matches for nonprofit effectiveness organizations based in the United States, 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	CCS Fundraising	Exact match	New York, NY, United StatesHQ recorded Nov 6, 2026	501-1,000	894 contacts →
	Exact match “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.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
2	The Bridgespan Group	Exact match	Boston, MA, United StatesHQ recorded Nov 6, 2026	201-500	479 contacts →
	Exact match “The Bridgespan Group is a global nonprofit that strives to make the world more equitable and just.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
3	Nonprofit Hr, Powered By Onedigital	Exact match	Washington, MA, United StatesHQ recorded Nov 6, 2026	10001+	306 contacts →
	Exact match “Nonprofit HR was founded with one goal in mind: to strengthen the social impact sector by strengthening its people.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
4	JCA	Exact match	Chicago, IL, United StatesHQ recorded Nov 6, 2026	n/a	282 contacts →
	Exact match “JCA is the first and foremost independent consulting firm dedicated to addressing the technology and operational needs of nonprofits.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
5	SSA Consultants	Exact match	Baton Rouge, LA, United StatesHQ recorded Nov 6, 2026	n/a	262 contacts →
	Exact match “We are partners and advisors of leading organizations and governments, bound to and inspired by a mission of helping our clients improve their performance.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
6	TCC Group	Exact match	New York, NY, United StatesHQ recorded Nov 6, 2026	n/a	244 contacts →
	Exact match “TCC Group collaborates with leaders to solve complex social problems.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
7	Nonprofit Finance Fund	Exact match	New York, NY, United StatesHQ recorded Nov 6, 2026	51-200	230 contacts →
	Exact match “Financing for nonprofits https://nff.org/our-work/financing/#Consulting for nonprofits https://nff.org/our-work/consulting/#Partnerships with funders and networks…” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
8	M R	Exact match	Washington, United StatesHQ recorded Nov 6, 2026	51-200	213 contacts →
	Exact match “We are M+R.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
9	Global Impact	Exact match	Washington, DC, United StatesHQ recorded Nov 6, 2026	51-200	190 contacts →
	Exact match “Global Impact serves as a trusted philanthropy advisor, intermediary, and nonprofit partner for greater giving.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
10	Amphil	Exact match	Oak Park, AZ, United StatesHQ recorded Nov 6, 2026	51-200	149 contacts →
	Exact match “AmPhil exists to promote the art of civil association by helping philanthropists, charitable foundations, and nonprofit organizations grow and flourish through practical guidance…” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
11	Emergent Method	Exact match	Baton Rouge, LA, United StatesHQ recorded Nov 6, 2026	51-200	134 contacts →
	Exact match “Emergent Method is a nationally recognized management consulting firm focused on developing and implementing plans, programs, and initiatives that result in transformative impact.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
12	JMT Consulting	Exact match	Mount Juliet, TN, United StatesHQ recorded Nov 6, 2026	51-200	112 contacts →
	Exact match “Our number one priority at JMT is to empower nonprofits to achieve their mission through optimized systems and processes.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
13	Campbell & Company	Exact match	Chicago, WA, United StatesHQ recorded Nov 6, 2026	51-200	103 contacts →
	Exact match “Campbell & Company is a national nonprofit consulting firm that helps organizations create greater impact through fundraising, communications and strategic information services.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
14	Third Plateau	Exact match	San Francisco, CA, United StatesHQ recorded Nov 6, 2026	51-200	96 contacts →
	Exact match “One of Fast Company's 2025 Best Workplaces for Innovators!* Third Plateau is an impact consultancy on a mission to build lasting social good.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
15	Zuri Group	Exact match	Bend, OR, United StatesHQ recorded Nov 6, 2026	51-200	90 contacts →
	Exact match “Zuri Group partners with nonprofit organizations to turn big ideas into reality.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
16	Schultz & Williams	Exact match	Philadelphia, PA, United StatesHQ recorded Nov 6, 2026	51-200	88 contacts →
	Exact match “Schultz & Williams is a national consulting firm that helps nonprofits strengthen fundraising, leadership capacity and organizational strategy through development consulting…” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
17	Empower Success Corps	Exact match	Boston, MA, United StatesHQ recorded Nov 6, 2026	51-200	79 contacts →
	Exact match “At ESC, our mission is to empower nonprofits to achieve their goals & contribute to a more just and equitable world.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
18	Humentum	Exact match	Washington, DC, United StatesHQ recorded Nov 6, 2026	51-200	77 contacts →
	Exact match “Humentum is a global nonprofit that unlocks the strategic power of operating models for social good organizations.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
19	Kiwi Partners	Exact match	New York, NY, United StatesHQ recorded Nov 6, 2026	51-200	76 contacts →
	Exact match “Kiwi Partners delivers exceptional Accounting, Consulting Services, and HR services to the nonprofit community.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
20	BWF	Exact match	Usa, United StatesHQ recorded Nov 6, 2026	51-200	69 contacts →
	Exact match “BWF Zuri is the nonprofit sector’s most comprehensive fundraising consulting company, helping organizations thrive in a rapidly changing landscape.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
21	Community Boost	Exact match	San Diego, CA, United StatesHQ recorded Nov 6, 2026	51-200	68 contacts →
	Exact match “We are the nonprofit sector’s expert’s expert.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
22	The Center For Nonprofit Management CNM	Exact match	Dallas, TX, United StatesHQ recorded Nov 6, 2026	11-50	66 contacts →
	Exact match “CNM provides strategic data expertise and leading-edge technology to nonprofits with the support of foundations and corporations.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
23	The Charity CFO	Exact match	St. Louis, MO, United StatesHQ recorded Nov 6, 2026	51-200	65 contacts →
	Exact match “The Charity CFO helps nonprofit leaders by creating clarity and understanding of their organization’s financial position, modernizing financial operations, and bringing the focus…” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
24	Cedarstone	Exact match	Wheaton, IL, United StatesHQ recorded Nov 6, 2026	51-200	64 contacts →
	Exact match “We began as one friend helping another establish a nonprofit in 1993.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
25	501 Commons	Exact match	Seattle, WA, United StatesHQ recorded Nov 6, 2026	51-200	60 contacts →
	Exact match “We all rise when nonprofits thrive.” 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 “nonprofit effectiveness organizations”. 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 2,599 nonprofit effectiveness organizations based in the United States

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Nonprofit effectiveness organizations based in the United States at a glance

As of Nov 6, 2026

39.7%Verified-email coverage

5.7Average contacts per company

1-10Median size (employees)

5.3%Largest-city concentration · New York

Nov 6, 2026Page data refreshed

Companies by employee count

1-10

2,315

11-50

233

51-200

201-500

501-1,000

1,001-5,000

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 2,599 companies.

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.
What qualifies: Company records associated with the United States whose business descriptions match “nonprofit effectiveness organizations” 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. Where headquarters information is recorded, preview rows are also filtered to this page’s location. 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 5,897 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.

Nonprofit effectiveness organizations by metro

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 “nonprofit effectiveness organizations”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many nonprofit effectiveness organizations are there based in the United States?

RevenueBase identified 2,599 company matches for nonprofit effectiveness organizations associated with the United States 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?

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

Which city has the most nonprofit effectiveness organizations?

New York leads with 138 company records, followed by Washington (109) and Chicago (106).

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 5,897 professional contacts with verified work emails tracked across these 2,599 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.