Company lists · Data refreshed September 2026
Top 25 Nonprofit consultants based in Washington, United States
RevenueBase identified 439 nonprofit consultants headquartered in Washington, United States as of September 2026 and tracks 4,355 professional contacts across them, including 1,844 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, its RevenueBase Smart Search rating, and when it was last checked. Data refreshed September 14, 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.
The 25 largest nonprofit consultants based in Washington, United States
Ranked by team size| # | Company | Contacts | |||
|---|---|---|---|---|---|
| 1 | 300 contacts → | ||||
Partial evidence “Nonprofit HR was founded with one goal in mind: to strengthen the social impact sector by strengthening its people.” Source: RevenueBase Database · checked Sep 14, 2026Thanks. The Data Team will review it. | |||||
| 2 | 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 14, 2026Thanks. The Data Team will review it. | |||||
| 3 | 208 contacts → | ||||
Indirect evidence “We are M+R.” Source: RevenueBase Database · checked Sep 14, 2026Thanks. The Data Team will review it. | |||||
| 4 | 170 contacts → | ||||
Indirect evidence “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: RevenueBase Database · checked Sep 14, 2026Thanks. The Data Team will review it. | |||||
| 5 | 170 contacts → | ||||
Partial evidence “Global Impact serves as a trusted philanthropy advisor, intermediary, and nonprofit partner for greater giving.” Source: RevenueBase Database · checked Sep 14, 2026Thanks. The Data Team will review it. | |||||
| 6 | 142 contacts → | ||||
Indirect evidence “Here at Herren, our goals are to drive efficiency and maximize the value of every dollar our clients spend.” Source: RevenueBase Database · checked Sep 14, 2026Thanks. The Data Team will review it. | |||||
| 7 | 101 contacts → | ||||
Partial evidence “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: RevenueBase Database · checked Sep 14, 2026Thanks. The Data Team will review it. | |||||
| 8 | 99 contacts → | ||||
Indirect evidence “Orr Group was born out of a need for event management and fundraising support in the philanthropic sector.” Source: RevenueBase Database · checked Sep 14, 2026Thanks. The Data Team will review it. | |||||
| 9 | 87 contacts → | ||||
Indirect evidence “Top accounting firm Raffa, P.C.” Source: RevenueBase Database · checked Sep 14, 2026Thanks. The Data Team will review it. | |||||
| 10 | 82 contacts → | ||||
Partial evidence “Compass Pro Bono forges lasting ties between local nonprofits and local business professionals to empower thriving, equitable, resilient communities.” Source: RevenueBase Database · checked Sep 14, 2026Thanks. The Data Team will review it. | |||||
| 11 | 81 contacts → | ||||
Partial evidence “Humentum is a global nonprofit that unlocks the strategic power of operating models for social good organizations.” Source: RevenueBase Database · checked Sep 14, 2026Thanks. The Data Team will review it. | |||||
| 12 | 74 contacts → | ||||
Partial 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 14, 2026Thanks. The Data Team will review it. | |||||
| 13 | 70 contacts → | ||||
Indirect evidence “Most consulting firms specialize in consulting for either for-profit companies or large multinational non-profits or NGOs.” Source: RevenueBase Database · checked Sep 14, 2026Thanks. The Data Team will review it. | |||||
| 14 | 64 contacts → | ||||
Partial 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 14, 2026Thanks. The Data Team will review it. | |||||
| 15 | 61 contacts → | ||||
Partial evidence “Freedman Consulting, LLC, a mission-driven firm, offers strategic consulting services to foundations, nonprofit organizations, and public interest coalitions, advising many of the…” Source: RevenueBase Database · checked Sep 14, 2026Thanks. The Data Team will review it. | |||||
| 16 | 59 contacts → | ||||
Indirect evidence “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: RevenueBase Database · checked Sep 14, 2026Thanks. The Data Team will review it. | |||||
| 17 | 55 contacts → | ||||
Partial evidence “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: RevenueBase Database · checked Sep 14, 2026Thanks. The Data Team will review it. | |||||
| 18 | 53 contacts → | ||||
Partial evidence “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: RevenueBase Database · checked Sep 14, 2026Thanks. The Data Team will review it. | |||||
| 19 | 52 contacts → | ||||
Indirect evidence “Ward Circle Strategies, Inc.” Source: RevenueBase Database · checked Sep 14, 2026Thanks. The Data Team will review it. | |||||
| 20 | 51 contacts → | ||||
Indirect evidence “The Chronicle of Philanthropy is the No.” Source: RevenueBase Database · checked Sep 14, 2026Thanks. The Data Team will review it. | |||||
| 21 | 51 contacts → | ||||
Partial evidence “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: RevenueBase Database · checked Sep 14, 2026Thanks. The Data Team will review it. | |||||
| 22 | 46 contacts → | ||||
Indirect evidence “Community IT Innovators is a Washington, D.C.” Source: RevenueBase Database · checked Sep 14, 2026Thanks. The Data Team will review it. | |||||
| 23 | 46 contacts → | ||||
Partial evidence “We are a diverse, Black-owned consulting firm that serves the philanthropic and nonprofit sectors.” Source: RevenueBase Database · checked Sep 14, 2026Thanks. The Data Team will review it. | |||||
| 24 | 43 contacts → | ||||
Indirect evidence “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: RevenueBase Database · checked Sep 14, 2026Thanks. The Data Team will review it. | |||||
| 25 | 41 contacts → | ||||
Indirect evidence “Blue Icon Advisors is the National Association of Student Financial Aid Administrators'(NASFAA) financial aid consulting service for colleges, universities, and career schools.” Source: RevenueBase Database · checked Sep 14, 2026Thanks. The Data Team will review it. | |||||
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 consultants. 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 consultants.
- Partial evidence
- Its own public description names part of nonprofit consultants, so it works in or next to the category without describing itself that way.
- Indirect evidence
- The description shown does not name nonprofit consultants. 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 439 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 1,844 reachable decision-makers.
Free signup · no credit card
Nonprofit consultants based in Washington, United States at a glance
As of Sep 14, 2026Companies by employee count
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 439 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 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 consultants”. 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 consultants), 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 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 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, 1,844 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 14, 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
- Nonprofit consultants in New York490
- Nonprofit consultants in Washington439
- Nonprofit consultants in Chicago342
- Nonprofit consultants in Atlanta297
- Nonprofit consultants in Los Angeles295
- Nonprofit consultants in Seattle172
- Nonprofit consultants in Denver169
- Nonprofit consultants in Austin160
- Nonprofit consultants in Boston151
- Nonprofit consultants in Houston150
- Nonprofit consultants in San Francisco149
- Nonprofit consultants in Philadelphia148
- Nonprofit consultants in Dallas144
- Nonprofit consultants in Portland126
- Nonprofit consultants in San Diego120
- Nonprofit consultants in Phoenix118
- Nonprofit consultants in Miami107
- Nonprofit consultants in Minneapolis101
- Nonprofit consultants in Charlotte97
- Nonprofit consultants in Indianapolis81
- Nonprofit consultants in Nashville71
- Nonprofit consultants in Cleveland69
- Nonprofit consultants in Columbus67
- Nonprofit consultants in Raleigh65
- Nonprofit consultants in Arlington64
- Nonprofit consultants in Tampa63
- Nonprofit consultants in San Antonio61
- Nonprofit consultants in Baltimore60
- Nonprofit consultants in Pittsburgh60
- Nonprofit consultants in Orlando58
- Nonprofit consultants in Detroit57
- Nonprofit consultants in Richmond56
- Nonprofit consultants in Sacramento56
- Nonprofit consultants in Kansas City53
- Nonprofit consultants in Alexandria51
- Nonprofit consultants in Las Vegas51
- Nonprofit consultants in Oakland50
- Nonprofit consultants in Cincinnati47
- Nonprofit consultants in New York City47
- Nonprofit consultants in New Orleans46
- Nonprofit consultants in St. Louis46
- Nonprofit consultants in Brooklyn44
- Nonprofit consultants in Fort Worth43
- Nonprofit consultants in Madison42
- Nonprofit consultants in Grand Rapids41
- Nonprofit consultants in Jacksonville41
- Nonprofit consultants in Milwaukee40
- Nonprofit consultants in Berkeley39
- Nonprofit consultants in Rochester39
- Nonprofit consultants in Columbia37
- Nonprofit consultants in Omaha37
- Nonprofit consultants in Boulder36
- Nonprofit consultants in Louisville36
- Nonprofit consultants in Colorado Springs35
- Nonprofit consultants in Greenville35
- Nonprofit consultants in Memphis33
- Nonprofit consultants in Albuquerque31
- Nonprofit consultants in Durham30
- Nonprofit consultants in Wilmington29
- Nonprofit consultants in Charleston28
- Nonprofit consultants in Fort Lauderdale28
- Nonprofit consultants in Lexington28
- Nonprofit consultants in Scottsdale28
- Nonprofit consultants in Long Beach27
- Nonprofit consultants in Tulsa27
- Nonprofit consultants in Bethesda26
- Nonprofit consultants in Remote26
- Nonprofit consultants in Tallahassee26
- Nonprofit consultants in Ann Arbor25
- Nonprofit consultants in Tucson25
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 consultants, 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 consultants are there based in Washington, United States?
RevenueBase identified 439 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 490 headquartered companies, followed by Washington (439) and Chicago (342).
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 1,844 verified decision-maker contacts tracked across these 439 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 14, 2026.
Ready to reach these companies? Verified emails and direct dials for all 439 nonprofit consultants based in Washington, United States. Start with a free account, no credit card.
Download this list →Related lists
Nonprofit consultants by geography
- Nonprofit consultants based in the United States
- Nonprofit consultants based in the United Kingdom
- Nonprofit consultants based in Canada
- Nonprofit consultants based in Brazil
- Nonprofit consultants based in France
- Nonprofit consultants based in Australia
- Nonprofit consultants based in Germany
- Nonprofit consultants based in the Netherlands
- Nonprofit consultants based in Spain
- Nonprofit consultants based in Italy
- Nonprofit consultants based in Sweden
- Nonprofit consultants based in Mexico
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.
More company lists
- All company lists
- Lists by location
- Lists A-Z
- New lists
- Nonprofit consultants based in the United States
- Nonprofit consultants based in the United Kingdom
- Nonprofit consultants based in Canada
- Nonprofit consultants based in Brazil
- Nonprofit consultants based in France
- Nonprofit consultants based in Australia