Company lists · Data refreshed September 2026

Top 22 Government relations firms based in Boston, United States

RevenueBase identified 33 government relations firms headquartered in Boston, United States as of September 2026 and tracks 209 professional contacts across them, including 110 with verified work emails. Washington is the largest hub.

This list covers government relations 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 19, 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 19, 2026 86% judged on-target in blind review
33Companies
209Contacts tracked
110Verified emails
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The 22 largest government relations firms based in Boston, United States

Ranked by team size
Top 22 of 33 government relations firms based in Boston, United States, ranked by team size, largest first. Data refreshed Sep 19, 2026. RevenueBase Smart Search rates how each company's information relates to government relations 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.
#CompanyRevenueBase Smart SearchHeadquartersEmployeesContacts
1Strong evidenceBoston, MA, United StatesHQ checked Sep 19, 202611-5048 contacts →

Strong evidence

“O’Neill and Associates is New England’s leading full-service government relations, crisis and public relations firm.”

Source: RevenueBase Database · checked Sep 19, 2026
2Partial evidenceBoston, MA, United StatesHQ checked Sep 19, 202611-5016 contacts →

Partial 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 19, 2026
3Partial evidenceBoston, MA, United StatesHQ checked Sep 19, 202611-5014 contacts →

Partial evidence

“With offices in Boston and Worcester and affiliates in New York City, Slowey McManus Communications provides strategic public relations, communications, and public affairs…”

Source: RevenueBase Database · checked Sep 19, 2026
4Indirect evidenceBoston, United StatesHQ checked Sep 19, 202611-5013 contacts →

Indirect evidence

“Benchmark Strategies is a Boston-based public affairs firm led by Patrick Bench.”

Source: RevenueBase Database · checked Sep 19, 2026
5Indirect evidenceBoston, MA, United StatesHQ checked Sep 19, 20261-1013 contacts →

Indirect 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 19, 2026
6Partial evidenceBoston, MA, United StatesHQ checked Sep 19, 20261-1011 contacts →

Partial 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 19, 2026
7Partial evidenceBoston, MA, United StatesHQ checked Sep 19, 20261-1011 contacts →

Partial 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 19, 2026
8Indirect evidenceBoston, MA, United StatesHQ checked Sep 19, 20261-1010 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 19, 2026
9Strong evidenceBoston, MA, United StatesHQ checked Sep 19, 202611-509 contacts →

Strong 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 19, 2026
10Strong evidenceBoston, MA, United StatesHQ checked Sep 19, 20261-108 contacts →

Strong evidence

“Drago + Toscano LLP is one of Boston’s foremost zoning, licensing, and government relations firms.”

Source: RevenueBase Database · checked Sep 19, 2026
11Partial evidenceBoston, MA, United StatesHQ checked Sep 19, 20261-106 contacts →

Partial evidence

“At The Brennan Group, our mission is to provide our clients with successful government affairs strategies.”

Source: RevenueBase Database · checked Sep 19, 2026
12Indirect evidenceBoston, MA, United StatesHQ checked Sep 19, 20261-104 contacts →

Indirect evidence

“Northwind Strategies offers full-service strategic communications, campaign management, and public affairs services for corporations, nonprofits and grassroots campaigns and…”

Source: RevenueBase Database · checked Sep 19, 2026
13Partial evidenceBoston, MA, United StatesHQ checked Sep 19, 20261-103 contacts →

Partial evidence

“Considine & Furey, LLP is a boutique law firm that specializes in complex litigation, government regulatory matters, and lobbying.”

Source: RevenueBase Database · checked Sep 19, 2026
14Partial evidenceBoston, MA, United StatesHQ checked Sep 19, 20261-103 contacts →

Partial 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 19, 2026
15Strong evidenceBoston, MA, United StatesHQ checked Sep 19, 20261-103 contacts →

Strong evidence

Government Relations experts specializing in Legislative and Executive Branch lobbying, Appropriations and Funding, and Regulatory matters.”

Source: RevenueBase Database · checked Sep 19, 2026
16Partial evidenceBoston, MA, United StatesHQ checked Sep 19, 20261-102 contacts →

Partial evidence

“We help organizations and individual clients connect and cultivate relationships with newsmakers, policymakers, influencers, civic and community leaders, and especially the…”

Source: RevenueBase Database · checked Sep 19, 2026
17Partial evidenceBoston, MA, United StatesHQ checked Sep 19, 20261-102 contacts →

Partial evidence

“The Suffolk Group, LLC is a multidisciplinary professional services firm, specializing in improving business performance through government affairs.”

Source: RevenueBase Database · checked Sep 19, 2026
18Indirect evidenceBoston, MA, United StatesHQ checked Sep 19, 202651-2002 contacts →

Indirect evidence

Source: RevenueBase Database · checked Sep 19, 2026
19Partial evidenceBoston, MA, United StatesHQ checked Sep 19, 20261-102 contacts →

Partial evidence

“Oak & Argyle is a full-service government affairs, strategic communications, and real estate development consulting firm.”

Source: RevenueBase Database · checked Sep 19, 2026
20Strong evidenceBoston, MA, United StatesHQ checked Sep 19, 20261-101 contacts →

Strong evidence

“27 South Strategies is a people-powered government relations firm, rewriting the playbook at all levels of government.”

Source: RevenueBase Database · checked Sep 19, 2026
21Indirect evidenceBoston, MA, United StatesHQ checked Sep 19, 20261-101 contacts →

Indirect 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 19, 2026
22Indirect evidenceBoston, MA, United StatesHQ checked Sep 19, 20261-101 contacts →

Indirect evidence

“Political insight.”

Source: RevenueBase Database · checked Sep 19, 2026

Showing 22 of 33 government relations firms based in Boston, United States

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Government relations firms based in Boston, United States at a glance

As of Sep 19, 2026
52.6%Verified-email coverage
6.3Average contacts per company
1-10Median size (employees)
1460.6%Largest-city concentration · Washington
Sep 19, 2026Page data refreshed

Companies by employee count

1-10
26
11-50
6
51-200
1

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 33 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 government relations 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 “government relations 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 government relations 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 government relations 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, 110 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 19, 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.

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 government relations 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 government relations firms are there based in Boston, United States?

RevenueBase identified 33 government relations 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 government relations firms?

Washington leads with 482 headquartered companies, followed by Sacramento (97) and Austin (76).

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 110 verified decision-maker contacts tracked across these 33 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 19, 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.