Company lists · Data refreshed September 2026

Top 25 Nonprofit interim management consultants worldwide

Name: Nonprofit interim management consultants worldwide
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 29, 2026 13,245 companies tracked

RevenueBase identified 13,245 company matches for nonprofit interim management consultants worldwide as of September 2026 and tracks 73,641 professional contacts across them, including 16,653 with verified work emails. The United States is the largest market and London the largest hub.

This list covers company matches for nonprofit interim management consultants 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 September 29, 2026. Country and city lists for nonprofit interim management consultants 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 Sep 29, 2026 How this list was built

13,245Companies

73,641Contacts tracked

16,653Verified emails

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The 25 largest nonprofit interim management consultants worldwide

Ranked by team size

Top 25 of 13,245 company matches for nonprofit interim management consultants worldwide, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Sep 29, 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	Bank Of The West	Exact match	Chicago, IL, United StatesHQ recorded Sep 29, 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 · Sep 29, 2026 · View company records in RevenueBase
2	180 Degrees Consulting	Exact match	Sydney, AustraliaHQ recorded Sep 29, 2026	10001+	2,891 contacts →
	Exact match “180 Degrees Consulting (180DC) is the world's largest youth led consultancy for non-profits, governments and social-conscious organisations, with over 200 branches in 38+…” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
3	Blackmont Consulting	Exact match	London, United KingdomHQ recorded Sep 29, 2026	201-500	1,221 contacts →
	Exact match “Blackmont Consulting provides 100% free advisory services to NGO´s, NPO´s and start-ups.” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
4	Your Part-Time Controller, LLC	Exact match	Philadelphia, PA, United StatesHQ recorded Sep 29, 2026	501-1,000	775 contacts →
	Exact match “THE NONPROFIT ACCOUNTING SPECIALISTS.” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
5	Professional	Exact match	Milan, ItalyHQ recorded Sep 29, 2026	n/a	535 contacts →
	Exact match “Consultant Corporate Governance and Project Management.” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
6	GVA	Exact match	Paris, FranceHQ recorded Sep 29, 2026	51-200	499 contacts →
	Exact match “Créé en 1975, GVA est composé de 80 personnes, pour près de 10 millions de chiffre d’affaires.” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
7	Tatum By Randstad	Exact match	Atlanta, GA, United StatesHQ recorded Sep 29, 2026	501-1,000	407 contacts →
	Exact match “Tatum by Randstad provides on-demand C-suite executives and senior-level professionals to help companies manage critical initiatives in accounting, finance, technology, compliance…” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
8	Nonprofit Hr, Powered By Onedigital	Exact match	Washington, DC, United StatesHQ recorded Sep 29, 2026	10001+	300 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 · Sep 29, 2026 · View company records in RevenueBase
9	JS Consultancy	Exact match	5211 Al 's Hertogenbosch, NetherlandsHQ recorded Sep 29, 2026	201-500	283 contacts →
	Exact match “JS Consultancy is al meer dan 30 jaar marktleider in het bemiddelen van professionals voor de publieke zaak.” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
10	GGG Partners, LLC Previously Grisanti, Galef & Goldress	Exact match	Atlanta, GA, United StatesHQ recorded Sep 29, 2026	n/a	283 contacts →
	Exact match “Partners, LLC has transformed under-performing companies into high performance operations for more than 60 years.” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
11	JCA	Exact match	Chicago, IL, United StatesHQ recorded Sep 29, 2026	n/a	265 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 · Sep 29, 2026 · View company records in RevenueBase
12	Isaacson, Miller	Exact match	Boston, MA, United StatesHQ recorded Sep 29, 2026	201-500	250 contacts →
	Exact match “Isaacson, Miller is one of the nation's premier executive search firms serving organizations that advance the public good.” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
13	TCC Group	Exact match	New York, NY, United StatesHQ recorded Sep 29, 2026	n/a	232 contacts →
	Exact match “TCC Group collaborates with leaders to solve complex social problems.” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
14	Prosperastiftelsen	Exact match	Oslo, NorwayHQ recorded Sep 29, 2026	1,001-5,000	232 contacts →
	Exact match “Prosperastiftelsen er et nettverk av pro bono-konsulenter med høyere utdannelse og arbeidserfaring fra ledende bedrifter, organisasjoner og offentlig sektor.” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
15	Arabella Advisors	Exact match	Washington, DC, United StatesHQ recorded Sep 29, 2026	201-500	227 contacts →
	Exact match “Arabella Advisors is a professional services firm that provides administrative, operational, and strategic support to nonprofits, foundations, and individual donors.” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
16	Techcxo	Exact match	Atlanta, GA, United StatesHQ recorded Sep 29, 2026	201-500	215 contacts →
	Exact match “TechCXO provides companies with on demand executives.” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
17	R&r	Exact match	Aires, ArgentinaHQ recorded Sep 29, 2026	n/a	213 contacts →
	Exact match “Consultores en Ciencias Económicas Consultoría en gestión de empresas e instituciones.” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
18	Nonprofit Finance Fund	Exact match	New York, NY, United StatesHQ recorded Sep 29, 2026	51-200	212 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 · Sep 29, 2026 · View company records in RevenueBase
19	M R	Exact match	Washington, United StatesHQ recorded Sep 29, 2026	51-200	208 contacts →
	Exact match “We are M+R.” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
20	Catalyste	Exact match	Toronto, ON, CanadaHQ recorded Sep 29, 2026	51-200	208 contacts →
	Exact match “With over 50 years’ experience in over 30 countries, our global reputation is based on our demonstrated ability to manage consistently high-performing, highly inclusive…” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
21	Gatenbysanderson	Exact match	Leeds, United KingdomHQ recorded Sep 29, 2026	51-200	202 contacts →
	Exact match “GatenbySanderson is the UK's leading people intelligence advisory business.” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
22	DE Kleine Consultant	Exact match	Leiden, NetherlandsHQ recorded Sep 29, 2026	51-200	195 contacts →
	Exact match “De Kleine Consultant maakt Kleine Consultants en haar klanten groot door strategisch advies te bieden daar waar het de meeste waarde toevoegt.” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
23	الزومان والفهد والحجاج للاستشارات المهنية	Exact match	Al Yasmin District, Saudi ArabiaHQ recorded Sep 29, 2026	51-200	177 contacts →
	Exact match “شركة الزومان والفهد والحجاج للاستشارات المهنية” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
24	CYLAD	Exact match	Puteaux, FranceHQ recorded Sep 29, 2026	51-200	171 contacts →
	Exact match “Independent consulting firm, CYLAD guides executives from industries and associated services to overcome performance, transformation and growth challenges.” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
25	CREW	Exact match	Philadelphia, MN, United StatesHQ recorded Sep 29, 2026	1,001-5,000	165 contacts →
	Exact match “Founded in tandem with Turnberry Solutions, Crew serves as an innovative talent development program for both Turnberry and our clients by focusing exclusively on high-performing…” Recorded in the RevenueBase company graph · Sep 29, 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 interim management consultants”. 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 13,245 nonprofit interim management consultants worldwide

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Nonprofit interim management consultants worldwide at a glance

As of Sep 29, 2026

22.6%Verified-email coverage

5.6Average contacts per company

1-10Median size (employees)

1.5%Largest-city concentration · London

Sep 29, 2026Page data refreshed

Companies by employee count

1-10

11,621

11-50

1,279

51-200

264

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 nonprofit interim management consultants are linked below.
What qualifies: Company records worldwide whose business descriptions match “nonprofit interim management consultants” 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 16,653 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 September 29, 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 interim management consultants by location

63 lists · largest first

Every Nonprofit interim management 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 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 interim management consultants”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many nonprofit interim management consultants are there worldwide?

RevenueBase identified 13,245 company matches for nonprofit interim management consultants worldwide as of September 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?

Bank Of The West tops the displayed preview by professional contacts tracked in RevenueBase. Recorded headquarters appear in the company rows.

Which country has the most nonprofit interim management consultants?

The United States leads with 4,423 companies, followed by the Netherlands (1,479) and the United Kingdom (567). Every nonprofit interim management consultants list by country and city is linked on this page.

Which city has the most nonprofit interim management consultants?

London leads with 197 company records, followed by New York (194) and Paris (188).

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 16,653 professional contacts with verified work emails tracked across these 13,245 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 September 29, 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.