Company lists · Data refreshed September 2026

Top 25 Philanthropic advisors based in Washington, United States

Name: Philanthropic advisors 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 102 companies tracked

RevenueBase identified 102 philanthropic advisors headquartered in Washington, United States as of September 2026 and tracks 1,727 professional contacts across them, including 882 with verified work emails. New York is the largest hub.

This list covers philanthropic advisors 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

102Companies

1,727Contacts tracked

882Verified emails

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The 25 largest philanthropic advisors based in Washington, United States

Ranked by team size

Top 25 of 102 philanthropic advisors 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 philanthropic advisors: 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	Council On Foundations	Partial evidence	Washington, DC, United StatesHQ checked Sep 20, 2026	51-200	186 contacts →
	Partial evidence “The Council on Foundations is a nonprofit membership association that serves as a guide for philanthropies as they advance the greater good.” Source: RevenueBase Database · checked Sep 20, 2026
4	Global Impact	Strong evidence	Washington, DC, United StatesHQ checked Sep 20, 2026	51-200	170 contacts →
	Strong evidence “Global Impact serves as a trusted philanthropy advisor, intermediary, and nonprofit partner for greater giving.” Source: RevenueBase Database · checked Sep 20, 2026
5	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
6	Avalon Consulting Group	Indirect evidence	Washington, DC, United StatesHQ checked Sep 20, 2026	51-200	74 contacts →
	Indirect 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
7	Lautman Maska Neill & Company	Indirect evidence	Washington, DC, United StatesHQ checked Sep 20, 2026	51-200	64 contacts →
	Indirect 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
8	The Chronicle Of Philanthropy	Partial evidence	Washington, DC, United StatesHQ checked Sep 20, 2026	51-200	51 contacts →
	Partial evidence “The Chronicle of Philanthropy is the No.” Source: RevenueBase Database · checked Sep 20, 2026
9	Philanthropy Roundtable	Partial evidence	Washington, DC, United StatesHQ checked Sep 20, 2026	11-50	41 contacts →
	Partial evidence “The Philanthropy Roundtable is a national association of individual donors, corporate giving officers, and foundation trustees and staff.” Source: RevenueBase Database · checked Sep 20, 2026
10	National Center For Family Philanthropy Ncfp	Partial evidence	Washington, DC, United StatesHQ checked Sep 20, 2026	11-50	32 contacts →
	Partial evidence “NCFP is a network of philanthropic families committed to a world that is vibrant, equitable, and resilient.” Source: RevenueBase Database · checked Sep 20, 2026
11	Civitas Public Affairs, An Orchestra Company	Partial evidence	Washington, DC, United StatesHQ checked Sep 20, 2026	11-50	25 contacts →
	Partial evidence “Known for its bold and strategic campaigns, Civitas Public Affairs Group supports philanthropists, thought leaders, and not-for-profits to advance bipartisan policy solutions on…” Source: RevenueBase Database · checked Sep 20, 2026
12	Accounts International	Partial evidence	Washington, DC, United StatesHQ checked Sep 20, 2026	11-50	25 contacts →
	Partial evidence “Accounts International is a financial advisory firm specializing in Fractional CFO services and financial guidance for growing businesses, entrepreneurs, and executives.” Source: RevenueBase Database · checked Sep 20, 2026
13	National Committee For Responsive Philanthropy	Partial evidence	Washington, DC, United StatesHQ checked Sep 20, 2026	11-50	22 contacts →
	Partial evidence “The National Committee for Responsive Philanthropy in Washington, D.C, is a national watchdog, research and advocacy organization that promotes philanthropy that serves the public…” Source: RevenueBase Database · checked Sep 20, 2026
14	Grantmakers In Health	Strong evidence	Washington, DC, United StatesHQ checked Sep 20, 2026	11-50	18 contacts →
	Strong evidence “Grantmakers In Health (GIH) is dedicated to helping philanthropic organizations and advisors improve the health of all people.” Source: RevenueBase Database · checked Sep 20, 2026
15	Foundation For Financial Planning	Indirect evidence	Washington, DC, United StatesHQ checked Sep 20, 2026	1-10	17 contacts →
	Indirect evidence “Foundation for Financial Planning (FFP) is the nation’s leading charity dedicated to advancing pro bono financial planning for at-risk populations, including active military…” Source: RevenueBase Database · checked Sep 20, 2026
16	Exponent Philanthropy	Partial evidence	Washington, DC, United StatesHQ checked Sep 20, 2026	11-50	16 contacts →
	Partial evidence “Exponent Philanthropy is the country’s largest association of funders and the only one dedicated to serving foundations with few or no staff, philanthropic families, and…” Source: RevenueBase Database · checked Sep 20, 2026
17	NEW Venture Fund	Partial evidence	Washington, DC, United StatesHQ checked Sep 20, 2026	201-500	16 contacts →
	Partial evidence “New Venture Fund collaborates with individuals and institutions to provide fiscal sponsorship and project hosting support that enable them to reach their philanthropic goals.” Source: RevenueBase Database · checked Sep 20, 2026
18	English Hudson Consulting	Indirect evidence	Washington, DC, United StatesHQ checked Sep 20, 2026	11-50	15 contacts →
	Indirect evidence “Founded by Lynn English and Marlissa Hudson, English Hudson aligns resources with mission-driven organizations through strategies that come from and are executed by the…” Source: RevenueBase Database · checked Sep 20, 2026
19	Russell Philanthropies	Indirect evidence	Washington, DC, United StatesHQ checked Sep 20, 2026	1-10	14 contacts →
	Indirect evidence “We're on a mission to build a more equitable world.” Source: RevenueBase Database · checked Sep 20, 2026
20	Spark Point Fundraising	Indirect evidence	Washington, DC, United StatesHQ checked Sep 20, 2026	11-50	14 contacts →
	Indirect 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
21	Napa Legal	Indirect evidence	Washington, DC, United StatesHQ checked Sep 20, 2026	1-10	12 contacts →
	Indirect evidence “Napa Legal is changing the game for faith-based nonprofits.” Source: RevenueBase Database · checked Sep 20, 2026
22	Nanoe National Association Of Nonprofit Organizations & Executives	Indirect evidence	Washington, DC, United StatesHQ checked Sep 20, 2026	11-50	12 contacts →
	Indirect evidence “Our Members Are Our Mission National Association of Nonprofit Organizations & Executives (NANOE) is a nationwide network of donors, volunteers and charitable leaders whose…” Source: RevenueBase Database · checked Sep 20, 2026
23	Abundance Strategies	Indirect evidence	Washington, DC, United StatesHQ checked Sep 20, 2026	1-10	11 contacts →
	Indirect 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
24	Klamp & Associates, P.C	Indirect evidence	Washington, DC, United StatesHQ checked Sep 20, 2026	1-10	11 contacts →
	Indirect evidence “Klamp & Associates is a law firm dedicated exclusively to representing charitable organizations.” Source: RevenueBase Database · checked Sep 20, 2026
25	Collaborateup	Indirect evidence	Washington, DC, United StatesHQ checked Sep 20, 2026	1-10	11 contacts →
	Indirect evidence “The world is facing its most profound geopolitical realignment in a generation, bringing complex challenges-and unprecedented opportunities-to uplift communities and generate…” 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: philanthropic advisors. 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 philanthropic advisors.
Partial evidence: Its own public description names part of philanthropic advisors, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name philanthropic advisors. 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 25 of 102 philanthropic advisors based in Washington, United States

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Philanthropic advisors based in Washington, United States at a glance

As of Sep 20, 2026

51.1%Verified-email coverage

16.9Average contacts per company

1-10Median size (employees)

210.8%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 102 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 philanthropic advisors, 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 “philanthropic advisors”. 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 philanthropic advisors), 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 philanthropic advisors, 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, 882 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.

Philanthropic advisors by metro in the United States

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 philanthropic advisors, 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 philanthropic advisors are there based in Washington, United States?

RevenueBase identified 102 philanthropic advisors 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 philanthropic advisors?

New York leads with 215 headquartered companies, followed by Chicago (113) and Washington (102).

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 882 verified decision-maker contacts tracked across these 102 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.