Company lists · Data refreshed September 2026

Top 25 Nonprofit consulting firms based in Washington, United States

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

Compiled by the RevenueBase Data Team Data refreshed Sep 5, 2026 250 companies tracked

RevenueBase identified 250 nonprofit consulting firms headquartered in Washington, United States as of September 2026 and tracks 2,889 professional contacts across them, including 1,317 with verified work emails. New York is the largest hub.

This list covers nonprofit consulting firms headquartered in Washington, 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, how directly it supports the match, and when it was last checked. Data refreshed September 5, 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 HQ checked on every row Match evidence on every row Refreshed Sep 5, 2026 86% judged on-target in blind review

250Companies

2,889Contacts tracked

1,317Verified emails

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

Ranked by team size

Top 25 of 250 nonprofit consulting firms based in Washington, United States, ranked by team size, largest first. Data refreshed Sep 5, 2026. Evidence rates how directly each company's own description names nonprofit consulting firms: strong (names it), partial (names part of it), indirect (matched on its full profile rather than the summary shown). Click a count to unlock that company's people.
#	Company	Headquarters	Employees	Contacts
1	Nonprofit Hr, Powered By OnedigitalPartial evidence	Washington, DC, United StatesHQ checked Sep 5, 2026	10001+	300
	“Nonprofit HR was founded with one goal in mind: to strengthen the social impact sector by strengthening its people.” Source: company website · checked Sep 5, 2026
2	Arabella AdvisorsPartial evidence	Washington, DC, United StatesHQ checked Sep 5, 2026	201-500	227
	“Arabella Advisors is a professional services firm that provides administrative, operational, and strategic support to nonprofits, foundations, and individual donors.” Source: company website · checked Sep 5, 2026
3	M RIndirect evidence	Washington, United StatesHQ checked Sep 5, 2026	51-200	208
	“We are M+R.” Source: company website · checked Sep 5, 2026
4	Mcallister & QuinnPartial evidence	Washington, DC, United StatesHQ checked Sep 5, 2026	51-200	170
	“McAllister & Quinn is a Washington, DC consulting firm that provides a comprehensive range of services to a diverse group of clients with issues before the federal government.” Source: company website · checked Sep 5, 2026
5	Herren AssociatesIndirect evidence	Washington, DC, United StatesHQ checked Sep 5, 2026	51-200	142
	“Here at Herren, our goals are to drive efficiency and maximize the value of every dollar our clients spend.” Source: company website · checked Sep 5, 2026
6	Hilltop ConsultantsPartial evidence	Washington, DC, United StatesHQ checked Sep 5, 2026	11-50	101
	“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: company website · checked Sep 5, 2026
7	ORR GroupIndirect evidence	Washington, DC, United StatesHQ checked Sep 5, 2026	51-200	99
	“Orr Group was born out of a need for event management and fundraising support in the philanthropic sector.” Source: company website · checked Sep 5, 2026
8	Raffa, PCIndirect evidence	Washington, DC, United StatesHQ checked Sep 5, 2026	1,001-5,000	87
	“Top accounting firm Raffa, P.C.” Source: company website · checked Sep 5, 2026
9	Avalon Consulting GroupStrong evidence	Washington, DC, United StatesHQ checked Sep 5, 2026	51-200	74
	“Avalon is a full-service fundraising consulting agency helping nonprofits realize the full potential of their direct marketing programs through multi-channel fundraising…” Source: company website · checked Sep 5, 2026
10	Georgetown Global ConsultingPartial evidence	Washington, DC, United StatesHQ checked Sep 5, 2026	51-200	70
	“Most consulting firms specialize in consulting for either for-profit companies or large multinational non-profits or NGOs.” Source: company website · checked Sep 5, 2026
11	Lautman Maska Neill & CompanyStrong evidence	Washington, DC, United StatesHQ checked Sep 5, 2026	51-200	64
	“Lautman Maska Neill & Company is an award-winning direct response consulting firm specializing in fully-integrated fundraising exclusively for nonprofits.” Source: company website · checked Sep 5, 2026
12	Freedman Consulting, LLCStrong evidence	Washington, DC, United StatesHQ checked Sep 5, 2026	11-50	61
	“Freedman Consulting, LLC, a mission-driven firm, offers strategic consulting services to foundations, nonprofit organizations, and public interest coalitions, advising many of the…” Source: company website · checked Sep 5, 2026
13	Strategix Management LLCIndirect evidence	Washington, DC, United StatesHQ checked Sep 5, 2026	201-500	59
	“Founded in 2016 by President and CEO, Jonathan Crawley, Strategix Management LLC employs cutting-edge technology to streamline and ignite program activities that increase the…” Source: company website · checked Sep 5, 2026
14	Elevate Smart Grants For Powerful Social ChangePartial evidence	Washington, DC, United StatesHQ checked Sep 5, 2026	51-200	55
	“Elevate is a woman-owned and woman-led business established to help nonprofit organizations of all sizes build, sustain, and grow effective grant programs.” Source: company website · checked Sep 5, 2026
15	BoardsourcePartial evidence	Washington, DC, United StatesHQ checked Sep 5, 2026	11-50	53
	“BoardSource envisions a future where the nonprofit community has the leadership to fulfill its purpose and create a just world where all can thrive.” Source: company website · checked Sep 5, 2026
16	Community IT InnovatorsIndirect evidence	Washington, DC, United StatesHQ checked Sep 5, 2026	51-200	46
	“Community IT Innovators is a Washington, D.C.” Source: company website · checked Sep 5, 2026
17	Frontline SolutionsStrong evidence	Washington, DC, United StatesHQ checked Sep 5, 2026	11-50	46
	“We are a diverse, Black-owned consulting firm that serves the philanthropic and nonprofit sectors.” Source: company website · checked Sep 5, 2026
18	Capital GroupPartial evidence	Washington, DC, United StatesHQ checked Sep 5, 2026	11-50	43
	“Capital Group is a management consulting firm with more than a decade of experience in providing effective and innovative consulting services to public and private sector clients.” Source: company website · checked Sep 5, 2026
19	Integral, LLCPartial evidence	Washington, DC, United StatesHQ checked Sep 5, 2026	11-50	27
	“Integral is a leading independent analytical consulting firm specializing in servicing the non-profit community.” Source: company website · checked Sep 5, 2026
20	High Impact Partners HIPPartial evidence	Washington, DC, United StatesHQ checked Sep 5, 2026	11-50	21
	“Management Consulting Firm * info@hipimpact.com.” Source: company website · checked Sep 5, 2026
21	Mission Partners, Benefit LLCIndirect evidence	Washington, DC, United StatesHQ checked Sep 5, 2026	11-50	19
	“Mission Partners guides purpose-driven organizations in realizing their greatest social impact.” Source: company website · checked Sep 5, 2026
22	Quatt AssociatesIndirect evidence	Washington, DC, United StatesHQ checked Sep 5, 2026	11-50	19
	“Quatt Associates, Inc.” Source: company website · checked Sep 5, 2026
23	Touchdown StrategiesIndirect evidence	Washington, DC, United StatesHQ checked Sep 5, 2026	1-10	15
	“OUR APPROACH Partner Strong relationships are at the heart of everything we do.” Source: company website · checked Sep 5, 2026
24	Spark Point FundraisingPartial evidence	Washington, DC, United StatesHQ checked Sep 5, 2026	11-50	14
	“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…” Source: company website · checked Sep 5, 2026
25	Bernuth & WilliamsonStrong evidence	Washington, DC, United StatesHQ checked Sep 5, 2026	11-50	13
	“Bernuth & Williamson provides consulting services in the areas of strategy, change management, and organizational development to leading nonprofits, foundations, associations, and…” Source: company website · checked Sep 5, 2026

Showing 25 of 250 nonprofit consulting firms based in Washington, United States

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

As of Sep 5, 2026

1-10Median size (employees)

New YorkLargest hub · 262 HQs

Contacts with mobile numbers

Sep 5, 2026Data refreshed

Companies by employee count

1-10

200

11-50

51-200

201-500

501-1,000

1,001-5,000

10001+

Email recency for this list is measured across the whole United States list rather than this city, so it is reported there. Company counts and contact totals on this page are exact for Washington, over 250 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 nonprofit consulting firms, so some rows will be adjacent to the category rather than pure plays. The description and evidence 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 SmartSearch, the natural-language company search available to every RevenueBase user.
What qualifies: Companies headquartered in Washington, United States whose own description of what they do matches “nonprofit consulting firms”. Matching reads each company's description, not its industry code or its name.
What we exclude: Companies whose own description does not clearly place them among nonprofit consulting firms, and records with no verified work email. Companies headquartered outside Washington 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 an evidence 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, 1,317 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 5, 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 consulting firms by metro in the United States

Frequently asked

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

RevenueBase identified 250 nonprofit consulting firms headquartered in Washington, 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?

Nonprofit Hr, Powered By Onedigital, headquartered in Washington, tops this list with the largest team on record.

Which city has the most nonprofit consulting firms?

New York leads with 262 headquartered companies, followed by Washington (250) and Chicago (193).

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 1,317 verified decision-maker contacts tracked across these 250 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 5, 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.