Company lists · Data refreshed September 2026

Top 23 Nonprofit fundraising agencies based in Washington, United States

Name: Nonprofit fundraising agencies 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 44 companies tracked

RevenueBase identified 44 nonprofit fundraising agencies headquartered in Washington, United States as of September 2026 and tracks 1,256 professional contacts across them, including 679 with verified work emails. New York is the largest hub.

This list covers nonprofit fundraising agencies 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, its RevenueBase Smart Search rating, and when it was last checked. Data refreshed September 20, 2026.

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.

How to read this list HQ checked on every row RevenueBase Smart Search rating on every row Refreshed Sep 20, 2026 86% judged on-target in blind review

44Companies

1,256Contacts tracked

679Verified emails

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The 23 largest nonprofit fundraising agencies based in Washington, United States

Ranked by team size

Top 23 of 44 nonprofit fundraising agencies based in Washington, United States, ranked by team size, largest first. Data refreshed Sep 20, 2026. RevenueBase Smart Search rates how each company's information relates to nonprofit fundraising agencies: strong evidence (its own description names it), partial (names part of it), indirect (matched on the rest of its profile rather than the description shown). Click a contact count to view that company's people.
#	Company	RevenueBase Smart Search	Headquarters	Employees	Contacts
1	Arabella Advisors	Partial evidence	Washington, DC, United StatesHQ checked Sep 20, 2026	201-500	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 20, 2026
2	M R	Indirect evidence	Washington, United StatesHQ checked Sep 20, 2026	51-200	208 contacts →
	Indirect evidence “We are M+R.” Source: RevenueBase Database · checked Sep 20, 2026
3	Global Impact	Partial evidence	Washington, DC, United StatesHQ checked Sep 20, 2026	51-200	170 contacts →
	Partial evidence “Global Impact serves as a trusted philanthropy advisor, intermediary, and nonprofit partner for greater giving.” Source: RevenueBase Database · checked Sep 20, 2026
4	O'brien Garrett	Strong evidence	Washington, DC, United StatesHQ checked Sep 20, 2026	n/a	152 contacts →
	Strong evidence “O'Brien Garrett is a comprehensive fundraising and communications company serving some of the nation's top nonprofits.” Source: RevenueBase Database · checked Sep 20, 2026
5	Globalgiving	Partial evidence	Washington, DC, United StatesHQ checked Sep 20, 2026	51-200	108 contacts →
	Partial evidence “GlobalGiving is a nonprofit that supports other community-led nonprofits by connecting them to donors and companies.” Source: RevenueBase Database · checked Sep 20, 2026
6	ORR Group	Partial evidence	Washington, DC, United StatesHQ checked Sep 20, 2026	51-200	99 contacts →
	Partial evidence “Orr Group was born out of a need for event management and fundraising support in the philanthropic sector.” Source: RevenueBase Database · checked Sep 20, 2026
7	Avalon Consulting Group	Strong evidence	Washington, DC, United StatesHQ checked Sep 20, 2026	51-200	74 contacts →
	Strong evidence “Avalon is a full-service fundraising consulting agency helping nonprofits realize the full potential of their direct marketing programs through multi-channel fundraising…” Source: RevenueBase Database · checked Sep 20, 2026
8	Lautman Maska Neill & Company	Strong evidence	Washington, DC, United StatesHQ checked Sep 20, 2026	51-200	64 contacts →
	Strong evidence “Lautman Maska Neill & Company is an award-winning direct response consulting firm specializing in fully-integrated fundraising exclusively for nonprofits.” Source: RevenueBase Database · checked Sep 20, 2026
9	Spark Point Fundraising	Strong evidence	Washington, DC, United StatesHQ checked Sep 20, 2026	11-50	14 contacts →
	Strong evidence “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: RevenueBase Database · checked Sep 20, 2026
10	Abundance Strategies	Partial evidence	Washington, DC, United StatesHQ checked Sep 20, 2026	1-10	11 contacts →
	Partial evidence “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…” Source: RevenueBase Database · checked Sep 20, 2026
11	Thread Strategies	Strong evidence	Washington, DC, United StatesHQ checked Sep 20, 2026	1-10	11 contacts →
	Strong evidence “Thread Strategies is a woman-led fundraising consulting firm that specializes in supporting small nonprofits.” Source: RevenueBase Database · checked Sep 20, 2026
12	Integrated Direct Marketing, LLC	Strong evidence	Washington, DC, United StatesHQ checked Sep 20, 2026	11-50	10 contacts →
	Strong evidence “Integrated Direct Marketing (IDM) is a full-service direct marketing agency that partners with nonprofit organizations to develop and meet fundraising, advocacy, and public…” Source: RevenueBase Database · checked Sep 20, 2026
13	Fundraise INC	Indirect evidence	Washington, DC, United StatesHQ checked Sep 20, 2026	1-10	8 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 20, 2026
14	Impact Communications, INC	Partial evidence	Washington, DC, United StatesHQ checked Sep 20, 2026	1-10	8 contacts →
	Partial evidence “Impact Communications is an experienced professional fundraising creative agency.” Source: RevenueBase Database · checked Sep 20, 2026
15	MKZ Strategies & Events	Indirect evidence	Washington, DC, United StatesHQ checked Sep 20, 2026	1-10	4 contacts →
	Indirect evidence “mKz Event Strategies offers inspired donor engagement that exceeds expectations and surpasses goals.” Source: RevenueBase Database · checked Sep 20, 2026
16	Concrete Rose	Strong evidence	Washington, DC, United StatesHQ checked Sep 20, 2026	1-10	2 contacts →
	Strong evidence “Concrete Rose LLC exists to help nonprofits succeed by providing grant writing, fundraising, donor cultivation, and other services so that you can remain laser-focused on your…” Source: RevenueBase Database · checked Sep 20, 2026
17	Little Bean Group	Partial evidence	Washington, DC, United StatesHQ checked Sep 20, 2026	1-10	2 contacts →
	Partial evidence “As a leading fundraising consulting firm, Little Bean Group provides a full range of services, including fundraising support, learning and development and thought leadership.” Source: RevenueBase Database · checked Sep 20, 2026
18	Greenkite Fundraising	Partial evidence	Washington, DC, United StatesHQ checked Sep 20, 2026	1-10	2 contacts →
	Partial evidence “GreenKite Fundraising, started by fundraising veteran, Heidi Webb, CFRE in 2018, takes the 'scary', frustrating, and seemingly hopeless feelings about fundraising and transforms…” Source: RevenueBase Database · checked Sep 20, 2026
19	Rebecca Diamond Fundraising	Indirect evidence	Washington, DC, United StatesHQ checked Sep 20, 2026	1-10	1 contacts →
	Indirect evidence “Rebecca Diamond is an experienced Development Officer with a demonstrated history of leadership and relationship building.” Source: RevenueBase Database · checked Sep 20, 2026
20	Martlet Insights	Indirect evidence	Washington, DC, United StatesHQ checked Sep 20, 2026	1-10	1 contacts →
	Indirect evidence “Martlet Insights is a leading consulting firm dedicated to empowering mission-driven organizations to secure the financial support they need to drive growth and create lasting…” Source: RevenueBase Database · checked Sep 20, 2026
21	Carter Davidson Consulting, LLC	Strong evidence	Washington, DC, United StatesHQ checked Sep 20, 2026	1-10	1 contacts →
	Strong evidence “CARTER+DAVIDSON Consulting seeks to empower the grassroots nonprofit community by delivering strategic fundraising and marketing consultation services.” Source: RevenueBase Database · checked Sep 20, 2026
22	Market ME Consulting	Partial evidence	Washington, DC, United StatesHQ checked Sep 20, 2026	1-10	1 contacts →
	Partial evidence “Market Me Consulting is a social-impact marketing and fundraising agency that helps organizations grow.” Source: RevenueBase Database · checked Sep 20, 2026
23	Rising Tide Strategic Fundraising & Nonprofit Consultants	Strong evidence	Washington, DC, United StatesHQ checked Sep 20, 2026	1-10	1 contacts →
	Strong evidence “Rising Tide Strategic Fundraising & Nonprofit Consultants provides full-service fundraising and communications consulting services.” Source: RevenueBase Database · checked Sep 20, 2026

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 fundraising agencies. 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 fundraising agencies.
Partial evidence: Its own public description names part of nonprofit fundraising agencies, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name nonprofit fundraising agencies. 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 23 of 44 nonprofit fundraising agencies based in Washington, United States

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Nonprofit fundraising agencies based in Washington, United States at a glance

As of Sep 20, 2026

54.1%Verified-email coverage

28.5Average contacts per company

1-10Median size (employees)

125.0%Largest-city concentration · New York

Sep 20, 2026Page data refreshed

Companies by employee count

1-10

11-50

51-200

201-500

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 44 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 fundraising agencies, 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.
What qualifies: Companies headquartered in Washington, United States whose own description of what they do matches “nonprofit fundraising agencies”. 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 fundraising agencies), 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 fundraising agencies, 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 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, 679 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 20, 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 fundraising agencies by metro in the United States

Nonprofit fundraising agencies in New York55
Nonprofit fundraising agencies in Washington44
Nonprofit fundraising agencies in Chicago42
Nonprofit fundraising agencies in Atlanta38
Nonprofit fundraising agencies in Dallas30
Nonprofit fundraising agencies in Los Angeles26

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 fundraising agencies, 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 fundraising agencies are there based in Washington, United States?

RevenueBase identified 44 nonprofit fundraising agencies 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?

Arabella Advisors, headquartered in Washington, tops this list with the largest team on record.

Which city has the most nonprofit fundraising agencies?

New York leads with 55 headquartered companies, followed by Washington (44) and Chicago (42).

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 679 verified decision-maker contacts tracked across these 44 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 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 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.