Company lists · Data refreshed September 2026

Top 25 Nonprofit consulting providers based in Washington, United States

Name: Nonprofit consulting providers based in Washington, United States
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 14, 2026 239 companies tracked

RevenueBase identified 239 company matches for nonprofit consulting providers associated with Washington, United States as of September 2026 and tracks 2,829 professional contacts across them, including 1,215 with verified work emails. Across the United States, New York is the largest hub for this category (307 companies); Washington follows with 239.

This list covers company matches for nonprofit consulting providers associated with Washington, 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 September 14, 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 Sep 14, 2026 How this list was built

239Companies

2,829Contacts tracked

1,215Verified emails

Explore this list → Free signup · no credit card · 500 free credits

The 25 largest nonprofit consulting providers based in Washington, United States

Ranked by team size

Top 25 of 239 company matches for nonprofit consulting providers based in Washington, United States, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Sep 14, 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	Nonprofit Hr, Powered By Onedigital	Exact match	Washington, DC, United StatesHQ recorded Sep 14, 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 14, 2026 · View company records in RevenueBase
2	Arabella Advisors	Exact match	Washington, DC, United StatesHQ recorded Sep 14, 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 14, 2026 · View company records in RevenueBase
3	M R	Exact match	Washington, United StatesHQ recorded Sep 14, 2026	51-200	208 contacts →
	Exact match “We are M+R.” Recorded in the RevenueBase company graph · Sep 14, 2026 · View company records in RevenueBase
4	Global Impact	Exact match	Washington, DC, United StatesHQ recorded Sep 14, 2026	51-200	170 contacts →
	Exact match “Global Impact serves as a trusted philanthropy advisor, intermediary, and nonprofit partner for greater giving.” Recorded in the RevenueBase company graph · Sep 14, 2026 · View company records in RevenueBase
5	Herren Associates	Exact match	Washington, DC, United StatesHQ recorded Sep 14, 2026	51-200	142 contacts →
	Exact match “Here at Herren, our goals are to drive efficiency and maximize the value of every dollar our clients spend.” Recorded in the RevenueBase company graph · Sep 14, 2026 · View company records in RevenueBase
6	Hilltop Consultants	Exact match	Washington, DC, United StatesHQ recorded Sep 14, 2026	11-50	101 contacts →
	Exact match “Hilltop Consultants is a consulting organization entirely run by Georgetown University undergraduates that executes and leads 6-7 strategy consulting projects each semester for…” Recorded in the RevenueBase company graph · Sep 14, 2026 · View company records in RevenueBase
7	ORR Group	Exact match	Washington, DC, United StatesHQ recorded Sep 14, 2026	51-200	99 contacts →
	Exact match “Orr Group was born out of a need for event management and fundraising support in the philanthropic sector.” Recorded in the RevenueBase company graph · Sep 14, 2026 · View company records in RevenueBase
8	Raffa, PC	Exact match	Washington, DC, United StatesHQ recorded Sep 14, 2026	1,001-5,000	87 contacts →
	Exact match “Top accounting firm Raffa, P.C.” Recorded in the RevenueBase company graph · Sep 14, 2026 · View company records in RevenueBase
9	Humentum	Exact match	Washington, DC, United StatesHQ recorded Sep 14, 2026	51-200	81 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 · Sep 14, 2026 · View company records in RevenueBase
10	Avalon Consulting Group	Exact match	Washington, DC, United StatesHQ recorded Sep 14, 2026	51-200	74 contacts →
	Exact match “Avalon is a full-service fundraising consulting agency helping nonprofits realize the full potential of their direct marketing programs through multi-channel fundraising…” Recorded in the RevenueBase company graph · Sep 14, 2026 · View company records in RevenueBase
11	Georgetown Global Consulting	Exact match	Washington, DC, United StatesHQ recorded Sep 14, 2026	51-200	70 contacts →
	Exact match “Most consulting firms specialize in consulting for either for-profit companies or large multinational non-profits or NGOs.” Recorded in the RevenueBase company graph · Sep 14, 2026 · View company records in RevenueBase
12	Lautman Maska Neill & Company	Exact match	Washington, DC, United StatesHQ recorded Sep 14, 2026	51-200	64 contacts →
	Exact match “Lautman Maska Neill & Company is an award-winning direct response consulting firm specializing in fully-integrated fundraising exclusively for nonprofits.” Recorded in the RevenueBase company graph · Sep 14, 2026 · View company records in RevenueBase
13	Freedman Consulting, LLC	Exact match	Washington, DC, United StatesHQ recorded Sep 14, 2026	11-50	61 contacts →
	Exact match “Freedman Consulting, LLC, a mission-driven firm, offers strategic consulting services to foundations, nonprofit organizations, and public interest coalitions, advising many of the…” Recorded in the RevenueBase company graph · Sep 14, 2026 · View company records in RevenueBase
14	Elevate Smart Grants For Powerful Social Change	Exact match	Washington, DC, United StatesHQ recorded Sep 14, 2026	51-200	55 contacts →
	Exact match “Elevate is a woman-owned and woman-led business established to help nonprofit organizations of all sizes build, sustain, and grow effective grant programs.” Recorded in the RevenueBase company graph · Sep 14, 2026 · View company records in RevenueBase
15	Boardsource	Exact match	Washington, DC, United StatesHQ recorded Sep 14, 2026	11-50	53 contacts →
	Exact match “BoardSource envisions a future where the nonprofit community has the leadership to fulfill its purpose and create a just world where all can thrive.” Recorded in the RevenueBase company graph · Sep 14, 2026 · View company records in RevenueBase
16	HAN Group LLC	Exact match	Washington, DC, United StatesHQ recorded Sep 14, 2026	51-200	51 contacts →
	Exact match “Han Group is a public accounting firm committed to serving the nonprofit community by providing unparalleled expertise in nonprofit Audits & Assurance, Managed Accounting, Tax…” Recorded in the RevenueBase company graph · Sep 14, 2026 · View company records in RevenueBase
17	Community IT Innovators	Exact match	Washington, DC, United StatesHQ recorded Sep 14, 2026	51-200	46 contacts →
	Exact match “Community IT Innovators is a Washington, D.C.” Recorded in the RevenueBase company graph · Sep 14, 2026 · View company records in RevenueBase
18	Integral, LLC	Exact match	Washington, DC, United StatesHQ recorded Sep 14, 2026	11-50	27 contacts →
	Exact match “Integral is a leading independent analytical consulting firm specializing in servicing the non-profit community.” Recorded in the RevenueBase company graph · Sep 14, 2026 · View company records in RevenueBase
19	High Impact Partners HIP	Exact match	Washington, DC, United StatesHQ recorded Sep 14, 2026	11-50	21 contacts →
	Exact match “Management Consulting Firm * info@hipimpact.com.” Recorded in the RevenueBase company graph · Sep 14, 2026 · View company records in RevenueBase
20	Quatt Associates	Exact match	Washington, DC, United StatesHQ recorded Sep 14, 2026	11-50	19 contacts →
	Exact match “Quatt Associates, Inc.” Recorded in the RevenueBase company graph · Sep 14, 2026 · View company records in RevenueBase
21	Spark Point Fundraising	Exact match	Washington, DC, United StatesHQ recorded Sep 14, 2026	11-50	14 contacts →
	Exact match “Spark Point is the resource that nonprofits are hungry for – a thought partner to guide them to an easily implemented, sustainable fundraising strategy and an experienced grant…” Recorded in the RevenueBase company graph · Sep 14, 2026 · View company records in RevenueBase
22	Bernuth & Williamson	Exact match	Washington, DC, United StatesHQ recorded Sep 14, 2026	11-50	13 contacts →
	Exact match “Bernuth & Williamson provides consulting services in the areas of strategy, change management, and organizational development to leading nonprofits, foundations, associations, and…” Recorded in the RevenueBase company graph · Sep 14, 2026 · View company records in RevenueBase
23	Innovative Federal Strategies	Exact match	Washington, United StatesHQ recorded Sep 14, 2026	11-50	13 contacts →
	Exact match “Innovative Federal Strategies provides big firm results with a small firm feel.” Recorded in the RevenueBase company graph · Sep 14, 2026 · View company records in RevenueBase
24	Bell Creek Consulting	Exact match	Washington, DC, United StatesHQ recorded Sep 14, 2026	11-50	12 contacts →
	Exact match “Bell Creek Consulting is a growing mission-‐driven firm launched by alumni of top‐tier strategy consultancies.” Recorded in the RevenueBase company graph · Sep 14, 2026 · View company records in RevenueBase
25	Abundance Strategies	Exact match	Washington, DC, United StatesHQ recorded Sep 14, 2026	1-10	11 contacts →
	Exact match “For more than ten years, Abundance Strategies (formerly KG Consulting) has been empowering nonprofits to embrace a culture of abundance and helping them to raise millions of…” Recorded in the RevenueBase company graph · Sep 14, 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 consulting providers”. 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 239 nonprofit consulting providers based in Washington, United States

See the full list, filter by size, metro and specialty, and access 1,215 tracked professional contacts with verified work emails. Direct dials are available where recorded.

Free signup · no credit card

View the full list →

Nonprofit consulting providers based in Washington, United States at a glance

As of Sep 14, 2026

42.9%Verified-email coverage

11.8Average contacts per company

1-10Median size (employees)

Sep 14, 2026Page data refreshed

Companies by employee count

1-10

189

11-50

51-200

201-500

1,001-5,000

10001+

Email recency for this list is measured across the whole United States list rather than for Washington, so it is reported there. Company counts and contact totals on this page are exact for Washington, over 239 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 Washington, United States whose business descriptions match “nonprofit consulting providers” 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 1,215 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 14, 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 consulting providers by metro in the United States

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 consulting providers”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many nonprofit consulting providers are there based in Washington, United States?

RevenueBase identified 239 company matches for nonprofit consulting providers associated with Washington, United States 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?

Nonprofit Hr, Powered By Onedigital tops the displayed preview by professional contacts tracked in RevenueBase. Recorded headquarters appear in the company rows.

Which city in the United States has the most nonprofit consulting providers?

New York leads the United States with 307 company records, followed by Washington (239) and Chicago (201).

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 1,215 professional contacts with verified work emails tracked across these 239 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 14, 2026.

Ready to reach these companies? Verified emails and direct dials for all 239 nonprofit consulting providers based in Washington, United States. Start with a free account, no credit card.

Download this list →

Related lists

Nonprofit consulting providers by geography

Browse the directory

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.