Company lists · Data refreshed September 2026
Top 25 Nonprofit volunteer management consultants worldwide
RevenueBase identified 3,339 nonprofit volunteer management consultants worldwide as of September 2026 and tracks 24,677 professional contacts across them, including 7,151 with verified work emails. The United States is the largest market and New York the largest hub.
This list covers nonprofit volunteer management 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 29, 2026. Country and city lists for nonprofit volunteer management 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.
The 25 largest nonprofit volunteer management consultants worldwide
Ranked by team size| # | Company | Contacts | |||
|---|---|---|---|---|---|
| 1 | 2,891 contacts → | ||||
Partial evidence “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+…” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 2 | 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 29, 2026Thanks. The Data Team will review it. | |||||
| 3 | 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 29, 2026Thanks. The Data Team will review it. | |||||
| 4 | 275 contacts → | ||||
Partial evidence “Taproot Foundation is a nonprofit organization connecting communities and driving social change.” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 5 | 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 29, 2026Thanks. The Data Team will review it. | |||||
| 6 | 232 contacts → | ||||
Indirect evidence “Prosperastiftelsen er et nettverk av pro bono-konsulenter med høyere utdannelse og arbeidserfaring fra ledende bedrifter, organisasjoner og offentlig sektor.” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 7 | 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 29, 2026Thanks. The Data Team will review it. | |||||
| 8 | 208 contacts → | ||||
Indirect evidence “We are M+R.” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 9 | 208 contacts → | ||||
Indirect evidence “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…” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 10 | 201 contacts → | ||||
Indirect evidence “Özel Sektör Gönüllüleri Derneği (ÖSGD) şirketler için “Çalışan Gönüllülüğü Programları” geliştirilmesi, çalışanların gönüllü olarak bilgi ve deneyimlerini paylaşabilecekleri…” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 11 | 195 contacts → | ||||
Partial evidence “De Kleine Consultant maakt Kleine Consultants en haar klanten groot door strategisch advies te bieden daar waar het de meeste waarde toevoegt.” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 12 | 150 contacts → | ||||
Indirect evidence “entidad que se dedica a la promoción social y en especial tienen servicios dedicados a la formación de voluntariado y profesionales, servicios de consultoría organizacional y…” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 13 | 137 contacts → | ||||
Indirect evidence “We exist to support non-profits as they carry out their world-changing missions.” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 14 | 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 29, 2026Thanks. The Data Team will review it. | |||||
| 15 | 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 29, 2026Thanks. The Data Team will review it. | |||||
| 16 | 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 29, 2026Thanks. The Data Team will review it. | |||||
| 17 | 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 29, 2026Thanks. The Data Team will review it. | |||||
| 18 | 106 contacts → | ||||
Partial evidence “Zuri Group partners with nonprofit organizations to turn big ideas into reality.” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 19 | 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 29, 2026Thanks. The Data Team will review it. | |||||
| 20 | 101 contacts → | ||||
Indirect evidence “At KCI, we are a firm focused on values and people…both ours and yours.” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 21 | 83 contacts → | ||||
Partial evidence “Schultz & Williams is a national consulting firm dedicated to helping nonprofits of all types and sizes achieve financial stability, meet organizational goals, and support greater…” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 22 | 74 contacts → | ||||
Indirect evidence “INTRODUCING THE STEIER GROUP Based in Omaha, Nebraska, with offices in Alabama, Arizona, Arkansas, California, Colorado, Illinois, Indiana, Iowa, Kansas, Michigan, Minnesota…” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 23 | 74 contacts → | ||||
Partial evidence “At ESC, our mission is to empower nonprofits to achieve their goals & contribute to a more just and equitable world.” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 24 | 73 contacts → | ||||
Strong evidence “Rosterfy is the world's leading volunteer management platform, helping organisations reduce administration, enhance volunteer experiences and scale their programs with confidence.” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 25 | 72 contacts → | ||||
Partial evidence “Bostrom is a professional services firm offering comprehensive management, consulting and outsourcing to the not-for-profit community.” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
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: nonprofit volunteer management 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 nonprofit volunteer management consultants.
- Partial evidence
- Its own public description names part of nonprofit volunteer management consultants, so it works in or next to the category without describing itself that way.
- Indirect evidence
- The description shown does not name nonprofit volunteer management 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 3,339 nonprofit volunteer management consultants worldwide
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Nonprofit volunteer management consultants worldwide at a glance
As of Sep 29, 2026Companies by employee count
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 nonprofit volunteer management 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 nonprofit volunteer management consultants are linked below.
- What qualifies
- Companies worldwide whose own description of what they do matches “nonprofit volunteer management 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 nonprofit volunteer management 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 nonprofit volunteer management 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, 7,151 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 29, 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.
Nonprofit volunteer management consultants by location
16 lists · largest firstEvery Nonprofit volunteer management consultants list RevenueBase publishes, by country and city. Counts are matching companies in each list as of its own refresh date.
Countries
- Nonprofit volunteer management consultants based in the United States1,947
- Nonprofit volunteer management consultants based in Canada157
- Nonprofit volunteer management consultants based in the United Kingdom113
- Nonprofit volunteer management consultants based in Australia61
- Nonprofit volunteer management consultants based in the Netherlands47
Cities
- Nonprofit volunteer management consultants based in New York, United States85
- Nonprofit volunteer management consultants based in Chicago, United States83
- Nonprofit volunteer management consultants based in Washington, United States81
- Nonprofit volunteer management consultants based in London, United Kingdom44
- Nonprofit volunteer management consultants based in Atlanta, United States41
- Nonprofit volunteer management consultants based in Toronto, Canada36
- Nonprofit volunteer management consultants based in Los Angeles, United States34
- Nonprofit volunteer management consultants based in Dallas, United States33
- Nonprofit volunteer management consultants based in Seattle, United States33
- Nonprofit volunteer management consultants based in Boston, United States32
- Nonprofit volunteer management consultants based in Portland, United States25
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 nonprofit volunteer management 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 nonprofit volunteer management consultants are there worldwide?
RevenueBase identified 3,339 nonprofit volunteer management 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?
180 Degrees Consulting, headquartered in Sydney, tops this list with the largest team on record.
Which country has the most nonprofit volunteer management consultants?
The United States leads with 1,947 companies, followed by Canada (157) and the United Kingdom (113). Every nonprofit volunteer management consultants list by country and city is linked on this page.
Which city has the most nonprofit volunteer management consultants?
New York leads with 85 headquartered companies, followed by Chicago (83) and Washington (81).
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 7,151 verified decision-maker contacts tracked across these 3,339 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 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 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.