Company lists · Data refreshed September 2026

Top 25 Consulting firms based in Washington, United States

Name: Consulting firms based in Washington, United States
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 8, 2026 1,238 companies tracked

RevenueBase identified 1,238 consulting firms headquartered in Washington, United States as of September 2026 and tracks 11,491 professional contacts across them, including 4,690 with verified work emails and 4,628 with mobile numbers. New York is the largest hub.

This list covers consulting firms 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 8, 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 8, 2026 86% judged on-target in blind review

1,238Companies

11,491Contacts tracked

4,690Verified emails

4,628Mobile numbers

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The 25 largest consulting firms based in Washington, United States

Ranked by team size

Top 25 of 1,238 consulting firms based in Washington, United States, ranked by team size, largest first. Data refreshed Sep 8, 2026. RevenueBase Smart Search rates how each company's information relates to consulting firms: 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	BRG	Indirect evidence	Washington, DC, United StatesHQ checked Sep 8, 2026	1,001-5,000	2,051 contacts →
	Indirect evidence “BRG combines world-leading academic credentials with world-tested business expertise, purpose-built for agility and connectivity, which sets us apart-and gets our clients ahead.” Source: RevenueBase Database · checked Sep 8, 2026
2	IBM Promontory	Strong evidence	Washington, DC, United StatesHQ checked Sep 8, 2026	501-1,000	403 contacts →
	Strong evidence “IBM Promontory is a global leader in strategy, risk management, and compliance consulting.#IBMConsulting” Source: RevenueBase Database · checked Sep 8, 2026
3	Kaiser Associates	Indirect evidence	Washington, DC, United StatesHQ checked Sep 8, 2026	51-200	397 contacts →
	Indirect evidence “Kaiser Associates was founded in 1981 with a simple yet powerful mission: to help executives make more informed strategic and operational decisions by incorporating external…” Source: RevenueBase Database · checked Sep 8, 2026
4	TCG	Indirect evidence	Washington, DC, United StatesHQ checked Sep 8, 2026	51-200	263 contacts →
	Indirect evidence “Traditional we are not.” Source: RevenueBase Database · checked Sep 8, 2026
5	Techunity, INC	Indirect evidence	Washington, DC, United StatesHQ checked Sep 8, 2026	51-200	156 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 8, 2026
6	Throughline, INC	Indirect evidence	Washington, DC, United StatesHQ checked Sep 8, 2026	51-200	145 contacts →
	Indirect evidence “Throughline specializes in harnessing the power of visual strategy and communications to transform established organizations into adaptive enterprises using design strategy…” Source: RevenueBase Database · checked Sep 8, 2026
7	Herren Associates	Indirect evidence	Washington, DC, United StatesHQ checked Sep 8, 2026	51-200	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 8, 2026
8	Telesolv Consulting	Indirect evidence	Washington, DC, United StatesHQ checked Sep 8, 2026	201-500	132 contacts →
	Indirect evidence “To become a demand business, an organization must constantly improve the value created by its core business processes.” Source: RevenueBase Database · checked Sep 8, 2026
9	Summit	Strong evidence	Washington, DC, United StatesHQ checked Sep 8, 2026	51-200	124 contacts →
	Strong evidence “Summit is a quantitative consulting and data analytics firm that works with public and commercial clients to turn data into actionable intelligence.” Source: RevenueBase Database · checked Sep 8, 2026
10	KCIC	Strong evidence	Washington, DC, United StatesHQ checked Sep 8, 2026	51-200	115 contacts →
	Strong evidence “KCIC is a consulting firm that helps companies manage their product liabilities.” Source: RevenueBase Database · checked Sep 8, 2026
11	The Cohen Group	Indirect evidence	Washington, DC, United StatesHQ checked Sep 8, 2026	51-200	110 contacts →
	Indirect evidence “Who We Are A talented team of experts with years of experience in both government and industry, with a passion for finding solutions and a deep understanding of the institutions…” Source: RevenueBase Database · checked Sep 8, 2026
12	Wikistrat	Indirect evidence	Washington, DC, United StatesHQ checked Sep 8, 2026	201-500	108 contacts →
	Indirect evidence “Wikistrat operates a global network of subject-matter experts who collaborate on an interactive platform to provide our clients with novel insights.” Source: RevenueBase Database · checked Sep 8, 2026
13	DCI Consulting	Strong evidence	Washington, DC, United StatesHQ checked Sep 8, 2026	51-200	93 contacts →
	Strong evidence “DCI is a human resources analytics and compliance consulting firm dedicated to helping our clients with their organizational challenges while also mitigating their risk.” Source: RevenueBase Database · checked Sep 8, 2026
14	RWD Consulting, LLC	Strong evidence	Washington, DC, United StatesHQ checked Sep 8, 2026	201-500	93 contacts →
	Strong evidence “RWD Consulting, LLC provides a range of management and operations support and consulting services, administrative and logistical services, and technical and creative services to…” Source: RevenueBase Database · checked Sep 8, 2026
15	Blue Water Thinking	Indirect evidence	Washington, DC, United StatesHQ checked Sep 8, 2026	51-200	91 contacts →
	Indirect evidence “Strategy, Management and Technology Consultancy” Source: RevenueBase Database · checked Sep 8, 2026
16	KX Advisors	Strong evidence	Washington, DC, United StatesHQ checked Sep 8, 2026	51-200	88 contacts →
	Strong evidence “For more than 40 years, Kx Advisors, part of BGBx Consulting, has provided strategy consulting services to help healthcare executives achieve critical business growth goals.” Source: RevenueBase Database · checked Sep 8, 2026
17	Raffa, PC	Indirect evidence	Washington, DC, United StatesHQ checked Sep 8, 2026	1,001-5,000	87 contacts →
	Indirect evidence “Top accounting firm Raffa, P.C.” Source: RevenueBase Database · checked Sep 8, 2026
18	Censeo Consulting Group	Indirect evidence	Washington, DC, United StatesHQ checked Sep 8, 2026	51-200	84 contacts →
	Indirect evidence “Running an organization and executing plans is hard work.” Source: RevenueBase Database · checked Sep 8, 2026
19	Veracity Engineering	Indirect evidence	Washington, DC, United StatesHQ checked Sep 8, 2026	51-200	80 contacts →
	Indirect evidence “Since 2001, Veracity Engineering has been successful in building, growing, and performing on a portfolio of technically challenging engineering and program management engagements…” Source: RevenueBase Database · checked Sep 8, 2026
20	PRM Consulting Group, INC	Indirect evidence	Washington, DC, United StatesHQ checked Sep 8, 2026	11-50	77 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 8, 2026
21	JMA Solutions	Strong evidence	Washington, DC, United StatesHQ checked Sep 8, 2026	51-200	77 contacts →
	Strong evidence “Headquartered in Washington, DC, JMA Solutions is an award-winning consulting firm with more than 20 years of experience delivering extraordinary customer service to our…” Source: RevenueBase Database · checked Sep 8, 2026
22	The Clearing, INC	Indirect evidence	Washington, DC, United StatesHQ checked Sep 8, 2026	51-200	75 contacts →
	Indirect evidence “The Clearing is an operations design and strategy firm dedicated to assisting organizations in assessing, designing, and implementing operational transformations that maximize the…” Source: RevenueBase Database · checked Sep 8, 2026
23	Willpower Consultation	Indirect evidence	Washington, DC, United StatesHQ checked Sep 8, 2026	11-50	75 contacts →
	Indirect evidence “Willpower Consultation offers direct solutions for your corporate strategy.” Source: RevenueBase Database · checked Sep 8, 2026
24	Delon Hampton & Associates, Chartered	Strong evidence	Washington, DC, United StatesHQ checked Sep 8, 2026	51-200	72 contacts →
	Strong evidence “Delon Hampton & Associates, Chartered (DHA), is a professional consulting engineering firm specializing in civil and structural engineering, as well as program and construction…” Source: RevenueBase Database · checked Sep 8, 2026
25	Dantech Corporation INC	Indirect evidence	Washington, DC, United StatesHQ checked Sep 8, 2026	11-50	72 contacts →
	Indirect evidence “As organizations navigate the demands of today’s fast-moving IT landscape, Dantech stands as a trusted partner with the expertise to guide, implement, and optimize technology…” Source: RevenueBase Database · checked Sep 8, 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: consulting firms. 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 consulting firms.
Partial evidence: Its own public description names part of consulting firms, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name consulting firms. 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 1,238 consulting firms based in Washington, United States

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Consulting firms based in Washington, United States at a glance

As of Sep 8, 2026

40.8%Verified-email coverage

40.3%Mobile-number coverage

9.3Average contacts per company

1-10Median size (employees)

304.4%Largest-city concentration · New York

Sep 8, 2026Page data refreshed

Companies by employee count

1-10

901

11-50

243

51-200

201-500

501-1,000

1,001-5,000

5,001-10,000

10001+

Freshness & accuracy

How recently the business emails were verified and the company information checked

Email last verified

Median 11.0d

4,2980–30

35631–60

161–90

390–180

32180+

Company record updated

Median 59.0d

00–30

5,88231–60

4,11061–90

90890–180

591180+

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 consulting firms, 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 “consulting firms”. 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 consulting firms), 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 consulting firms, 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, 4,690 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 8, 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.

Consulting firms 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 consulting firms, 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 consulting firms are there based in Washington, United States?

RevenueBase identified 1,238 consulting firms 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?

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

Which city has the most consulting firms?

New York leads with 3769 headquartered companies, followed by Chicago (1869) and Atlanta (1817).

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 4,690 verified decision-maker contacts tracked across these 1,238 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 8, 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.