Company lists · Data refreshed September 2026

Top 25 Nonprofit HR service providers based in Washington, United States

Name: Nonprofit HR service 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 20, 2026 72 companies tracked

RevenueBase identified 72 company matches for nonprofit HR service providers associated with Washington, United States as of September 2026 and tracks 1,468 professional contacts across them, including 598 with verified work emails. Across the United States, New York is the largest hub for this category (141 companies); Washington has 72.

This list covers company matches for nonprofit HR service 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 20, 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 20, 2026 How this list was built

72Companies

1,468Contacts tracked

598Verified emails

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The 25 largest nonprofit HR service providers based in Washington, United States

Ranked by team size

Top 25 of 72 company matches for nonprofit HR service providers based in Washington, United States, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Sep 20, 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 20, 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 20, 2026 · View company records in RevenueBase
2	Arabella Advisors	Exact match	Washington, DC, United StatesHQ recorded Sep 20, 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 20, 2026 · View company records in RevenueBase
3	M R	Exact match	Washington, United StatesHQ recorded Sep 20, 2026	51-200	208 contacts →
	Exact match “We are M+R.” Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
4	ORR Group	Exact match	Washington, DC, United StatesHQ recorded Sep 20, 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 20, 2026 · View company records in RevenueBase
5	Raffa, PC	Exact match	Washington, DC, United StatesHQ recorded Sep 20, 2026	1,001-5,000	87 contacts →
	Exact match “Top accounting firm Raffa, P.C.” Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
6	Humentum	Exact match	Washington, DC, United StatesHQ recorded Sep 20, 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 20, 2026 · View company records in RevenueBase
7	Boardsource	Exact match	Washington, DC, United StatesHQ recorded Sep 20, 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 20, 2026 · View company records in RevenueBase
8	The Choice, INC	Exact match	Washington, DC, United StatesHQ recorded Sep 20, 2026	51-200	51 contacts →
	Exact match Recorded description not available. Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
9	Auxilio Partners	Exact match	Washington, DC, United StatesHQ recorded Sep 20, 2026	11-50	31 contacts →
	Exact match “Auxilio was founded to provide comprehensive business services to churches and related non-profits.” Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
10	Vetted Solutions	Exact match	Washington, DC, United StatesHQ recorded Sep 20, 2026	1-10	16 contacts →
	Exact match “Vetted Solutions is a Washington, DC-based executive search firm specializing in association and nonprofit recruiting and consulting.” Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
11	National Native American Human Resources Association Nnahra	Exact match	Washington, DC, United StatesHQ recorded Sep 20, 2026	1-10	16 contacts →
	Exact match “The National Native American Human Resources Association (NNAHRA) is a non-profit organization comprised of Human Resources professionals working for a Native American Tribe or…” Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
12	Spark Point Fundraising	Exact match	Washington, DC, United StatesHQ recorded Sep 20, 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 20, 2026 · View company records in RevenueBase
13	Klamp & Associates, P.C	Exact match	Washington, DC, United StatesHQ recorded Sep 20, 2026	1-10	11 contacts →
	Exact match “Klamp & Associates is a law firm dedicated exclusively to representing charitable organizations.” Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
14	Good Insight	Exact match	Washington, DC, United StatesHQ recorded Sep 20, 2026	1-10	10 contacts →
	Exact match “Good Insight is an award-winning executive search firm with an exclusive focus on the social sector.” Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
15	The Nonprofit Alliance	Exact match	Washington, DC, United StatesHQ recorded Sep 20, 2026	1-10	9 contacts →
	Exact match “TNPA empowers mission-driven changemakers.” Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
16	Fundraise INC	Exact match	Washington, DC, United StatesHQ recorded Sep 20, 2026	1-10	8 contacts →
	Exact match Recorded description not available. Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
17	Pinnacle HR Consulting, LLC	Exact match	Washington, DC, United StatesHQ recorded Sep 20, 2026	11-50	6 contacts →
	Exact match “HR Empowered, Consulting & Outsourcing serving the District of Columbia, Maryland, Virginia, Georgia, North Carolina and South Carolina.” Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
18	The Consonance Group	Exact match	Washington, DC, United StatesHQ recorded Sep 20, 2026	1-10	4 contacts →
	Exact match “The Consonance Group (TCG) provides bookkeeping, human resources, and financial management services to a wide range of nonprofit and small for-profit businesses.” Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
19	Mevvn, LLC	Exact match	Washington, DC, United StatesHQ recorded Sep 20, 2026	1-10	4 contacts →
	Exact match “mevvn, LLC provides management consulting services to support organizational leaders in nonprofits, startups and small businesses.” Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
20	Cessna & Associates	Exact match	Washington, DC, United StatesHQ recorded Sep 20, 2026	1-10	4 contacts →
	Exact match “Cessna & Associates helps you succeed in serving your members and the causes championed by your organization.” Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
21	Greater Human Capital	Exact match	Washington, DC, United StatesHQ recorded Sep 20, 2026	1-10	2 contacts →
	Exact match “Greater Human Capital is a people-first HR consulting firm helping organizations strengthen compliance, strategy, and culture.” Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
22	Managers Resource Group, INC	Exact match	Washington, WV, United StatesHQ recorded Sep 20, 2026	1-10	2 contacts →
	Exact match “The team at Managers Resource Group, Inc.” Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
23	I4x Institute For Excellence In Public Service	Exact match	Washington, DC, United StatesHQ recorded Sep 20, 2026	1-10	1 contacts →
	Exact match “The NFBPA Institute for Excellence in Public Service offers management advice, consultancy, research, policy analysis and staffing.” Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
24	Better Call Katie	Exact match	Washington, DC, United StatesHQ recorded Sep 20, 2026	1-10	1 contacts →
	Exact match “BCK provides bookkeeping, payroll, operations management, and HR support to companies in diverse fields, from fundraisers and lobbyists to a large media group.” Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
25	David Galligan Consulting	Exact match	Washington, DC, United StatesHQ recorded Sep 20, 2026	1-10	1 contacts →
	Exact match “Advising on all matters in the wheelhouse of experienced nonprofit CEOs, COOs, trustees.” Recorded in the RevenueBase company graph · Sep 20, 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 HR service 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 72 nonprofit HR service providers based in Washington, United States

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Nonprofit HR service providers based in Washington, United States at a glance

As of Sep 20, 2026

40.7%Verified-email coverage

20.4Average contacts per company

1-10Median size (employees)

Sep 20, 2026Page data refreshed

Companies by employee count

1-10

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 72 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 HR service 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 598 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 20, 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 HR service 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 HR service providers”; each Exact match badge shows search membership, not an individual similarity or quality score.

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

RevenueBase identified 72 company matches for nonprofit HR service 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 HR service providers?

New York leads the United States with 141 company records, followed by Atlanta (105) and Chicago (101). Washington has 72.

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 598 professional contacts with verified work emails tracked across these 72 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 20, 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.