Company lists · Data refreshed September 2026

Top 25 Grassroots consulting firms based in the United States

Name: Grassroots consulting firms based in the United States
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 28, 2026 7,348 companies tracked

RevenueBase identified 7,348 company matches for grassroots consulting firms associated with the United States as of September 2026 and tracks 49,800 professional contacts across them, including 14,797 with verified work emails. Washington is the largest hub.

This list covers company matches for grassroots consulting firms associated with the 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 28, 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 28, 2026 How this list was built

7,348Companies

49,800Contacts tracked

14,797Verified emails

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The 25 largest grassroots consulting firms based in the United States

Ranked by team size

Top 25 of 7,348 company matches for grassroots consulting firms based in the United States, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Sep 28, 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	Bank Of The West	Exact match	Chicago, IL, United StatesHQ recorded Sep 28, 2026	n/a	4,751 contacts →
	Exact match “We help businesses and nonprofits grow, communicate, and succeed, professionally and affordably.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
2	Lucas Group	Exact match	Los Angeles, CA, United StatesHQ recorded Sep 28, 2026	10001+	756 contacts →
	Exact match “Ultimate Minds is a professional consulting and marketing firm dedicated to empowering businesses, nonprofits, and startups with smart, affordable, and results-driven solutions.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
3	CCS Fundraising	Exact match	New York, NY, United StatesHQ recorded Sep 28, 2026	501-1,000	728 contacts →
	Exact match “For over 75 years, CCS Fundraising has empowered many of the world’s greatest organizations to advance some of the most important causes in history.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
4	365 Media	Exact match	Portsmouth, NH, United StatesHQ recorded Sep 28, 2026	n/a	460 contacts →
	Exact match “365 Media is a total service provider business community building and audience engagement.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
5	The Bridgespan Group	Exact match	Boston, MA, United StatesHQ recorded Sep 28, 2026	201-500	443 contacts →
	Exact match “The Bridgespan Group is a global nonprofit that strives to make the world more equitable and just.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
6	Lutheran Services In Iowa	Exact match	Des Moines, IA, United StatesHQ recorded Sep 28, 2026	501-1,000	415 contacts →
	Exact match “Making a difference takes leadership and courage.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
7	The Outreach Team	Exact match	Ithaca, NY, United StatesHQ recorded Sep 28, 2026	201-500	398 contacts →
	Exact match “The Outreach Team is a national consulting firm working to make the world a better place.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
8	Deep Water Point & Associates	Exact match	Annapolis, MD, United StatesHQ recorded Sep 28, 2026	201-500	350 contacts →
	Exact match “Deep Water Point & Associates is composed of industry veterans and government experts who dedicate their expertise to maximize our clients’ competitive edge.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
9	Fieldworks	Exact match	Washington, DC, United StatesHQ recorded Sep 28, 2026	5,001-10,000	336 contacts →
	Exact match “FieldWorks brings innovative grassroots and field strategies to Democratic and progressive campaigns and organizations.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
10	Iquasar LLC	Exact match	Sterling, VA, United StatesHQ recorded Sep 28, 2026	201-500	312 contacts →
	Exact match “Based in Sterling, Virginia, iQuasar LLC, with over 20 years of experience, we help small and medium businesses grow in the federal marketplace through Proposal Development…” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
11	Csrs, A Westwood Company	Exact match	Baton Rouge, LA, United StatesHQ recorded Sep 28, 2026	51-200	305 contacts →
	Exact match “CSRS was acquired by Westwood Professional Services on June 30, 2025.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
12	Oswego County Opportunities, INC	Exact match	Fulton, NY, United StatesHQ recorded Sep 28, 2026	501-1,000	303 contacts →
	Exact match “Oswego County Opportunities (OCO) inspires partnerships and provides services that empower people, support communities and change lives.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
13	SSA Consultants	Exact match	Baton Rouge, LA, United StatesHQ recorded Sep 28, 2026	n/a	258 contacts →
	Exact match “We are partners and advisors of leading organizations and governments, bound to and inspired by a mission of helping our clients improve their performance.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
14	Cornerstone Government Affairs	Exact match	Washington, DC, United StatesHQ recorded Sep 28, 2026	201-500	255 contacts →
	Exact match “Cornerstone Government Affairs is a full-service, bipartisan, employee-owned firm specializing in government relations and lobbying, public affairs, strategic communications, and…” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
15	TCC Group	Exact match	New York, NY, United StatesHQ recorded Sep 28, 2026	n/a	232 contacts →
	Exact match “TCC Group collaborates with leaders to solve complex social problems.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
16	VTM Group	Exact match	Beaverton, OR, United StatesHQ recorded Sep 28, 2026	51-200	221 contacts →
	Exact match “VTM Group is the industry-leading, single source for launching, managing and promoting standard setting alliances, initiatives, and collaborative programs in the technology…” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
17	IFF Cdfi	Exact match	Chicago, IL, United StatesHQ recorded Sep 28, 2026	51-200	216 contacts →
	Exact match “Grounded in equity and deep sector expertise, IFF champions nonprofits to shape more equitable and vibrant communities through community-centered lending, development, and real…” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
18	Nonprofit Finance Fund	Exact match	New York, NY, United StatesHQ recorded Sep 28, 2026	51-200	212 contacts →
	Exact match “Financing for nonprofits https://nff.org/our-work/financing/#Consulting for nonprofits https://nff.org/our-work/consulting/#Partnerships with funders and networks…” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
19	M R	Exact match	Washington, United StatesHQ recorded Sep 28, 2026	51-200	208 contacts →
	Exact match “We are M+R.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
20	Social Impact	Exact match	Arlington, VA, United StatesHQ recorded Sep 28, 2026	51-200	200 contacts →
	Exact match “Social Impact is a global development management consulting firm.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
21	DCI	Exact match	Washington, DC, United StatesHQ recorded Sep 28, 2026	51-200	198 contacts →
	Exact match “DCI Group is an independent public affairs consulting firm that specializes in public relations, crisis management, grassroots engagement, and digital advocacy.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
22	Lilly & Company	Exact match	Austin, TX, United StatesHQ recorded Sep 28, 2026	n/a	187 contacts →
	Exact match “Since its inception, Lilly & Company has built a unique and comprehensive strategy for providing the best possible services available in political fundraising and grassroots…” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
23	Atlas Advisors, LLC	Exact match	Columbus, OH, United StatesHQ recorded Sep 28, 2026	201-500	172 contacts →
	Exact match “Founded by a former U.S.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
24	Mcallister & Quinn	Exact match	Washington, DC, United StatesHQ recorded Sep 28, 2026	51-200	170 contacts →
	Exact match “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.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
25	Invariant	Exact match	Washington, DC, United StatesHQ recorded Sep 28, 2026	51-200	166 contacts →
	Exact match “Invariant is a bipartisan business advisory firm, providing strategic advice to companies, trade associations, non-profits, and individuals on how to make Washington work for them.” Recorded in the RevenueBase company graph · Sep 28, 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 “grassroots consulting firms”. 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 7,348 grassroots consulting firms based in the United States

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Grassroots consulting firms based in the United States at a glance

As of Sep 28, 2026

29.7%Verified-email coverage

6.8Average contacts per company

1-10Median size (employees)

6.0%Largest-city concentration · Washington

Sep 28, 2026Page data refreshed

Companies by employee count

1-10

6,281

11-50

872

51-200

145

201-500

501-1,000

1,001-5,000

5,001-10,000

10001+

Email recency for this list is measured worldwide rather than for United States, so it is reported there. Company counts and contact totals on this page are exact for United States, over 7,348 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 the United States whose business descriptions match “grassroots consulting firms” 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 14,797 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 28, 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.

Grassroots consulting firms by metro

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 “grassroots consulting firms”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many grassroots consulting firms are there based in the United States?

RevenueBase identified 7,348 company matches for grassroots consulting firms associated with the 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?

Bank Of The West tops the displayed preview by professional contacts tracked in RevenueBase. Recorded headquarters appear in the company rows.

Which city has the most grassroots consulting firms?

Washington leads with 444 company records, followed by New York (344) and Chicago (206).

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 14,797 professional contacts with verified work emails tracked across these 7,348 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 28, 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.