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Company lists · Data refreshed September 2026

Top 25 Nonprofit consultants based in Washington, United States

Compiled by the RevenueBase Data Team Data refreshed Sep 5, 2026 443 companies tracked

RevenueBase identified 443 nonprofit consultants headquartered in Washington, United States as of September 2026 and tracks 4,364 professional contacts across them, including 1,846 with verified work emails. New York is the largest hub.

This list covers nonprofit consultants 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
443Companies
4,364Contacts tracked
1,846Verified emails
Unlock all 443 companies Free signup · no credit card · 500 free credits

The 25 largest nonprofit consultants based in Washington, United States

Ranked by team size
Top 25 of 443 nonprofit consultants 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 consultants: 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.
#CompanyHeadquartersEmployeesContacts
1
Nonprofit Hr, Powered By OnedigitalPartial evidence
Washington, DC, United StatesHQ checked Sep 5, 202610001+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, 2026201-500227

“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, 202651-200208

“We are M+R.”

Source: company website · checked Sep 5, 2026
4
Mcallister & QuinnIndirect evidence
Washington, DC, United StatesHQ checked Sep 5, 202651-200170

“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
Global ImpactPartial evidence
Washington, DC, United StatesHQ checked Sep 5, 202651-200170

“Global Impact serves as a trusted philanthropy advisor, intermediary, and nonprofit partner for greater giving.”

Source: company website · checked Sep 5, 2026
6
Herren AssociatesIndirect evidence
Washington, DC, United StatesHQ checked Sep 5, 202651-200142

“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
7
Hilltop ConsultantsPartial evidence
Washington, DC, United StatesHQ checked Sep 5, 202611-50101

“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
8
ORR GroupIndirect evidence
Washington, DC, United StatesHQ checked Sep 5, 202651-20099

“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
9
Raffa, PCIndirect evidence
Washington, DC, United StatesHQ checked Sep 5, 20261,001-5,00087

“Top accounting firm Raffa, P.C.”

Source: company website · checked Sep 5, 2026
10
Compass PRO BonoPartial evidence
Washington, DC, United StatesHQ checked Sep 5, 202611-5082

“Compass Pro Bono forges lasting ties between local nonprofits and local business professionals to empower thriving, equitable, resilient communities.”

Source: company website · checked Sep 5, 2026
11
HumentumPartial evidence
Washington, DC, United StatesHQ checked Sep 5, 202651-20081

“Humentum is a global nonprofit that unlocks the strategic power of operating models for social good organizations.”

Source: company website · checked Sep 5, 2026
12
Avalon Consulting GroupPartial evidence
Washington, DC, United StatesHQ checked Sep 5, 202651-20074

“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
13
Georgetown Global ConsultingIndirect evidence
Washington, DC, United StatesHQ checked Sep 5, 202651-20070

“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
14
Lautman Maska Neill & CompanyPartial evidence
Washington, DC, United StatesHQ checked Sep 5, 202651-20064

“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
15
Freedman Consulting, LLCPartial evidence
Washington, DC, United StatesHQ checked Sep 5, 202611-5061

“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
16
Strategix Management LLCIndirect evidence
Washington, DC, United StatesHQ checked Sep 5, 2026201-50059

“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
17
Elevate Smart Grants For Powerful Social ChangePartial evidence
Washington, DC, United StatesHQ checked Sep 5, 202651-20055

“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
18
BoardsourcePartial evidence
Washington, DC, United StatesHQ checked Sep 5, 202611-5053

“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
19
Ward Circle StrategiesIndirect evidence
Washington, DC, United StatesHQ checked Sep 5, 202651-20052

“Ward Circle Strategies, Inc.”

Source: company website · checked Sep 5, 2026
20
The Chronicle Of PhilanthropyIndirect evidence
Washington, DC, United StatesHQ checked Sep 5, 202651-20051

“The Chronicle of Philanthropy is the No.”

Source: company website · checked Sep 5, 2026
21
HAN Group LLCPartial evidence
Washington, DC, United StatesHQ checked Sep 5, 202651-20051

“Han Group is a public accounting firm committed to serving the nonprofit community by providing unparalleled expertise in nonprofit Audits & Assurance, Managed Accounting, Tax…”

Source: company website · checked Sep 5, 2026
22
Community IT InnovatorsIndirect evidence
Washington, DC, United StatesHQ checked Sep 5, 202651-20046

“Community IT Innovators is a Washington, D.C.”

Source: company website · checked Sep 5, 2026
23
Frontline SolutionsPartial evidence
Washington, DC, United StatesHQ checked Sep 5, 202611-5046

“We are a diverse, Black-owned consulting firm that serves the philanthropic and nonprofit sectors.”

Source: company website · checked Sep 5, 2026
24
Capital GroupIndirect evidence
Washington, DC, United StatesHQ checked Sep 5, 202611-5043

“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
25
Blue Icon Advisors, Nasfaa ConsultingIndirect evidence
Washington, DC, United StatesHQ checked Sep 5, 2026n/a41

“Blue Icon Advisors is the National Association of Student Financial Aid Administrators'(NASFAA) financial aid consulting service for colleges, universities, and career schools.”

Source: company website · checked Sep 5, 2026

Showing 25 of 443 nonprofit consultants based in Washington, United States

See the full list, filter by size, metro and specialty, and get verified emails and direct dials for all 1,846 reachable decision-makers.

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Nonprofit consultants based in Washington, United States at a glance

As of Sep 5, 2026
1-10Median size (employees)
New YorkLargest hub · 500 HQs
Contacts with mobile numbers
Sep 5, 2026Data refreshed

Companies by employee count

1-10
350
11-50
62
51-200
25
201-500
2
501-1,000
1
1,001-5,000
2
10001+
1

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 443 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 consultants, 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 consultants”. 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 consultants, 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, 1,846 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 consultants by metro in the United States

Frequently asked

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

RevenueBase identified 443 nonprofit consultants 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 consultants?

New York leads with 500 headquartered companies, followed by Washington (443) and Chicago (351).

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 1,846 verified decision-maker contacts tracked across these 443 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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Related lists

Browse: Companies home · Nonprofit consultants in United States · All United States lists · All Nonprofit consultants lists · New lists

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.

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