Company lists · Data refreshed September 2026

Top 25 Lobbying firms based in Boston, United States

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

Compiled by the RevenueBase Data Team Data refreshed Sep 20, 2026 40 companies tracked

RevenueBase identified 40 lobbying firms headquartered in Boston, United States as of September 2026 and tracks 229 professional contacts across them, including 118 with verified work emails. Washington is the largest hub.

This list covers lobbying firms headquartered in Boston, 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

40Companies

229Contacts tracked

118Verified emails

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The 25 largest lobbying firms based in Boston, United States

Ranked by team size

Top 25 of 40 lobbying firms based in Boston, United States, ranked by team size, largest first. Data refreshed Sep 20, 2026. RevenueBase Smart Search rates how each company's information relates to lobbying 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	O'neill And Associates	Indirect evidence	Boston, MA, United StatesHQ checked Sep 20, 2026	11-50	48 contacts →
	Indirect evidence “O’Neill and Associates is New England’s leading full-service government relations, crisis and public relations firm.” Source: RevenueBase Database · checked Sep 20, 2026
2	Tremont Strategies Group	Indirect evidence	Boston, MA, United StatesHQ checked Sep 20, 2026	11-50	16 contacts →
	Indirect evidence “Tremont Strategies Group is a full-service government affairs and public-policy consulting firm offering a broad suite of practices and a steadfast commitment to delivering the…” Source: RevenueBase Database · checked Sep 20, 2026
3	Benchmark Strategies	Indirect evidence	Boston, United StatesHQ checked Sep 20, 2026	11-50	13 contacts →
	Indirect evidence “Benchmark Strategies is a Boston-based public affairs firm led by Patrick Bench.” Source: RevenueBase Database · checked Sep 20, 2026
4	Smith, Costello & Crawford	Strong evidence	Boston, MA, United StatesHQ checked Sep 20, 2026	1-10	13 contacts →
	Strong evidence “Smith, Costello & Crawford is a regulatory and legislative policy firm dedicated to helping our clients achieve success through consulting, lobbying, and law services.” Source: RevenueBase Database · checked Sep 20, 2026
5	Charles Group Consulting	Indirect evidence	Boston, MA, United StatesHQ checked Sep 20, 2026	1-10	11 contacts →
	Indirect evidence “Since 2001, Charles Group Consulting (CGC) has provided its clients with unparalleled access to state government and guidance toward achieving successful outcomes for their…” Source: RevenueBase Database · checked Sep 20, 2026
6	Public Strategy Group, INC	Indirect evidence	Boston, MA, United StatesHQ checked Sep 20, 2026	1-10	11 contacts →
	Indirect evidence “Public Strategy Group, Inc.(PSG) is a full-service public relations and public affairs firm with its headquarters in Boston, MA.” Source: RevenueBase Database · checked Sep 20, 2026
7	Bulfinch Strategies Group	Indirect evidence	Boston, MA, United StatesHQ checked Sep 20, 2026	1-10	10 contacts →
	Indirect evidence “Building and launching a successful strategy requires more than just getting you in the door with the right policymakers.” Source: RevenueBase Database · checked Sep 20, 2026
8	Serlin Haley, LLP	Indirect evidence	Boston, MA, United StatesHQ checked Sep 20, 2026	11-50	9 contacts →
	Indirect evidence “Based in Boston with offices in Washington DC, Maine and California, Serlin Haley offers a full range of government relations services to businesses and trade organizations at the…” Source: RevenueBase Database · checked Sep 20, 2026
9	Drago Toscano, LLP	Indirect evidence	Boston, MA, United StatesHQ checked Sep 20, 2026	1-10	8 contacts →
	Indirect evidence “Drago + Toscano LLP is one of Boston’s foremost zoning, licensing, and government relations firms.” Source: RevenueBase Database · checked Sep 20, 2026
10	Nardo & Associates	Indirect evidence	Boston, MA, United StatesHQ checked Sep 20, 2026	11-50	7 contacts →
	Indirect evidence “NARDO & ASSOCIATES advises counsel, principals, and board in high-stakes matters involving conflict, scrutiny, and operational disruption.” Source: RevenueBase Database · checked Sep 20, 2026
11	The Brennan Group, INC	Indirect evidence	Boston, MA, United StatesHQ checked Sep 20, 2026	1-10	6 contacts →
	Indirect evidence “At The Brennan Group, our mission is to provide our clients with successful government affairs strategies.” Source: RevenueBase Database · checked Sep 20, 2026
12	The Novus Group	Indirect evidence	Boston, MA, United StatesHQ checked Sep 20, 2026	11-50	5 contacts →
	Indirect evidence “Motivated by a singular focus on successful client outcomes, The Novus Group leverages its unique blend of subject expertise in leading political and issues campaigns.” Source: RevenueBase Database · checked Sep 20, 2026
13	Merrimack Potomac Charles	Indirect evidence	Boston, MA, United StatesHQ checked Sep 20, 2026	1-10	4 contacts →
	Indirect evidence “Merrimack Potomac + Charles is a full-service, strategic advisory with offices up and down the East Coast.” Source: RevenueBase Database · checked Sep 20, 2026
14	Consensus Strategies	Indirect evidence	Boston, MA, United StatesHQ checked Sep 20, 2026	11-50	3 contacts →
	Indirect evidence “Consensus Strategies is a national consulting firm specializing in land use politics, public opinion research, and strategic advocacy.” Source: RevenueBase Database · checked Sep 20, 2026
15	Nuciforo LAW Group LLC	Indirect evidence	Boston, MA, United StatesHQ checked Sep 20, 2026	1-10	3 contacts →
	Indirect evidence “Nuciforo Law Group was founded by Andrea F.” Source: RevenueBase Database · checked Sep 20, 2026
16	Considine & Furey, LLP	Strong evidence	Boston, MA, United StatesHQ checked Sep 20, 2026	1-10	3 contacts →
	Strong evidence “Considine & Furey, LLP is a boutique law firm that specializes in complex litigation, government regulatory matters, and lobbying.” Source: RevenueBase Database · checked Sep 20, 2026
17	Dempsey Associates	Strong evidence	Boston, MA, United StatesHQ checked Sep 20, 2026	1-10	3 contacts →
	Strong evidence “Government Relations experts specializing in Legislative and Executive Branch lobbying, Appropriations and Funding, and Regulatory matters.” Source: RevenueBase Database · checked Sep 20, 2026
18	Gray Media INC	Indirect evidence	Boston, MA, United StatesHQ checked Sep 20, 2026	1-10	3 contacts →
	Indirect evidence “Gray Media is a public affairs PR firm specializing in communication strategy issues, especially in the nexus of the government and private sectors.” Source: RevenueBase Database · checked Sep 20, 2026
19	Highbury Strategies	Indirect evidence	Boston, MA, United StatesHQ checked Sep 20, 2026	1-10	2 contacts →
	Indirect evidence “Highbury Strategies provides the strategic guidance, tools, and experience to mobilize support for issues, influence policy fights and win tough campaigns.” Source: RevenueBase Database · checked Sep 20, 2026
20	The Suffolk Group, LLC	Indirect evidence	Boston, MA, United StatesHQ checked Sep 20, 2026	1-10	2 contacts →
	Indirect evidence “The Suffolk Group, LLC is a multidisciplinary professional services firm, specializing in improving business performance through government affairs.” Source: RevenueBase Database · checked Sep 20, 2026
21	MLM Strategies LLC	Indirect evidence	Boston, MA, United StatesHQ checked Sep 20, 2026	51-200	2 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 20, 2026
22	OAK & Argyle	Indirect evidence	Boston, MA, United StatesHQ checked Sep 20, 2026	1-10	2 contacts →
	Indirect evidence “Oak & Argyle is a full-service government affairs, strategic communications, and real estate development consulting firm.” Source: RevenueBase Database · checked Sep 20, 2026
23	The Graves Group	Strong evidence	Boston, MA, United StatesHQ checked Sep 20, 2026	1-10	1 contacts →
	Strong evidence “The Graves Group is a public affairs, lobbying and political consulting firm headquartered in Boston, Massachusetts with operations in New York and Washington, D.C.” Source: RevenueBase Database · checked Sep 20, 2026
24	27 South Strategies	Indirect evidence	Boston, MA, United StatesHQ checked Sep 20, 2026	1-10	1 contacts →
	Indirect evidence “27 South Strategies is a people-powered government relations firm, rewriting the playbook at all levels of government.” Source: RevenueBase Database · checked Sep 20, 2026
25	Murphy Donoghue Partners	Indirect evidence	Boston, MA, United StatesHQ checked Sep 20, 2026	1-10	1 contacts →
	Indirect evidence “Political insight.” 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: lobbying 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 lobbying firms.
Partial evidence: Its own public description names part of lobbying firms, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name lobbying 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 40 lobbying firms based in Boston, United States

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Lobbying firms based in Boston, United States at a glance

As of Sep 20, 2026

51.5%Verified-email coverage

5.7Average contacts per company

1-10Median size (employees)

1452.5%Largest-city concentration · Washington

Sep 20, 2026Page data refreshed

Companies by employee count

1-10

11-50

51-200

Email recency for this list is measured across the whole United States list rather than for Boston, so it is reported there. Company counts and contact totals on this page are exact for Boston, over 40 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 lobbying 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 Boston, United States whose own description of what they do matches “lobbying 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 lobbying 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 lobbying firms, and records with no verified work email. Companies headquartered outside Boston 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, 118 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.

Lobbying 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 lobbying 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 lobbying firms are there based in Boston, United States?

RevenueBase identified 40 lobbying firms headquartered in Boston, 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?

O'neill And Associates, headquartered in Boston, tops this list with the largest team on record.

Which city has the most lobbying firms?

Washington leads with 581 headquartered companies, followed by Sacramento (106) and Austin (84).

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 118 verified decision-maker contacts tracked across these 40 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.