Company lists · Data refreshed September 2026

Top 25 Insurance defense law firms based in Boston, United States

Name: Insurance defense law 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 14, 2026 61 companies tracked

RevenueBase identified 61 insurance defense law firms headquartered in Boston, United States as of September 2026 and tracks 1,609 professional contacts across them, including 942 with verified work emails. Across the United States, New York is the largest hub for this category (235 companies); Boston has 61.

This list covers insurance defense law 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 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.

How to read this list HQ checked on every row RevenueBase Smart Search rating on every row Refreshed Sep 14, 2026 86% judged on-target in blind review

61Companies

1,609Contacts tracked

942Verified emails

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The 25 largest insurance defense law firms based in Boston, United States

Ranked by team size

Top 25 of 61 insurance defense law firms based in Boston, United States, ranked by team size, largest first. Data refreshed Sep 14, 2026. RevenueBase Smart Search rates how each company's information relates to insurance defense law 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	Morrison Mahoney LLP	Indirect evidence	Boston, MA, United StatesHQ checked Sep 14, 2026	201-500	398 contacts →
	Indirect evidence “For 75 years, Morrison Mahoney LLP has been committed to servicing its clients' needs and working with its clients to achieve desired goals and objectives.” Source: RevenueBase Database · checked Sep 14, 2026
2	Boyle Shaughnessy LAW	Partial evidence	Boston, MA, United StatesHQ checked Sep 14, 2026	51-200	137 contacts →
	Partial evidence “Recognized as one of the region's most experienced, reliable and persistent litigation firms, Boyle \| Shaughnessy Law builds confidence with each client by achieving winning…” Source: RevenueBase Database · checked Sep 14, 2026
3	Cetrulo LLP	Partial evidence	Boston, MA, United StatesHQ checked Sep 14, 2026	51-200	100 contacts →
	Partial evidence “For over 25 years, our dedicated attorneys have been setting the standard for exceptional representation in liability defense litigation.” Source: RevenueBase Database · checked Sep 14, 2026
4	Peabody & Arnold LLP	Partial evidence	Boston, MA, United StatesHQ checked Sep 14, 2026	51-200	90 contacts →
	Partial evidence “Firm Overview At Peabody & Arnold, our attorneys handle complex and often highly sensitive matters, and have particular expertise in civil litigation and insurance services.” Source: RevenueBase Database · checked Sep 14, 2026
5	Campbell Conroy & O'neil, P.C	Indirect evidence	Boston, MA, United StatesHQ checked Sep 14, 2026	51-200	83 contacts →
	Indirect evidence “Recognized both nationally and internationally for delivering results on high stakes, complex litigation throughout the United States, Campbell Conroy & O’Neil, P.C.” Source: RevenueBase Database · checked Sep 14, 2026
6	Melick & Porter, LLP	Indirect evidence	Boston, MA, United StatesHQ checked Sep 14, 2026	51-200	79 contacts →
	Indirect evidence “We know our way around a courtroom.” Source: RevenueBase Database · checked Sep 14, 2026
7	Altman Nussbaum Shunnarah Trial Attorneys	Partial evidence	Boston, MA, United StatesHQ checked Sep 14, 2026	51-200	60 contacts →
	Partial evidence “With over 34 years of combined experience under the law firm's belt, Altman Nussbaum Shunnarah Trial Attorneys, P.C.” Source: RevenueBase Database · checked Sep 14, 2026
8	Tkck LAW	Indirect evidence	Boston, MA, United StatesHQ checked Sep 14, 2026	51-200	48 contacts →
	Indirect evidence “Tentindo, Kendall, Canniff & Keefe LLP (TKCK) concentrates in the representation of insurers, businesses, and employers in Massachusetts, New Hampshire, Connecticut, Rhode Island…” Source: RevenueBase Database · checked Sep 14, 2026
9	Pierce Davis & Perritano LLP	Indirect evidence	Boston, MA, United StatesHQ checked Sep 14, 2026	11-50	47 contacts →
	Indirect evidence “At Pierce Davis & Perritano we embrace a simple philosophy - clients deserve more than just effort, they deserve results.” Source: RevenueBase Database · checked Sep 14, 2026
10	Fitch LAW Partners LLP	Partial evidence	Boston, MA, United StatesHQ checked Sep 14, 2026	11-50	46 contacts →
	Partial evidence “Fitch Law Partners LLP is a litigation law firm distinguished by its preeminent lawyers and the successful results it has achieved for its sophisticated group of clients in…” Source: RevenueBase Database · checked Sep 14, 2026
11	Adler Cohen Harvey Wakeman & Guekguezian, LLP	Partial evidence	Boston, MA, United StatesHQ checked Sep 14, 2026	11-50	44 contacts →
	Partial evidence “For more than twenty-five years, Adler, Cohen, Harvey, Wakeman & Guekguezian has consistently delivered successful results defending our clients in civil litigation and licensing…” Source: RevenueBase Database · checked Sep 14, 2026
12	Donovan Hatem LLP	Partial evidence	Boston, MA, United StatesHQ checked Sep 14, 2026	51-200	39 contacts →
	Partial evidence “Donovan Hatem LLP is a multi-practice law firm comprised of more than 35 litigation and general business attorneys serving a diverse clientele of public and private companies…” Source: RevenueBase Database · checked Sep 14, 2026
13	Murphy & Riley, P.C	Strong evidence	Boston, MA, United StatesHQ checked Sep 14, 2026	11-50	38 contacts →
	Strong evidence “Murphy & Riley is a leading civil litigation firm, concentrating in the defense of personal injury, professional liability, business and insurance litigation matters in all state…” Source: RevenueBase Database · checked Sep 14, 2026
14	Martin, Magnuson, Mccarthy & Kenney	Partial evidence	Boston, MA, United StatesHQ checked Sep 14, 2026	11-50	36 contacts →
	Partial evidence “Founded in 1957, Martin, Magnuson, McCarthy & Kenney is a mid-sized law firm with extensive civil litigation and appellate experience.” Source: RevenueBase Database · checked Sep 14, 2026
15	Burns & Farrey	Partial evidence	Boston, MA, United StatesHQ checked Sep 14, 2026	11-50	34 contacts →
	Partial evidence “Burns & Farrey has a 65-year history of providing litigation defense solutions to its national and international client base.” Source: RevenueBase Database · checked Sep 14, 2026
16	Block & Leviton LLP	Partial evidence	Boston, MA, United StatesHQ checked Sep 14, 2026	11-50	25 contacts →
	Partial evidence “Block & Leviton LLP is a boutique law firm focused on complex litigation nationwide.” Source: RevenueBase Database · checked Sep 14, 2026
17	Brody Hardoon Perkins & Kesten, LLP Bhpk LAW	Indirect evidence	Boston, MA, United StatesHQ checked Sep 14, 2026	11-50	24 contacts →
	Indirect evidence “When we say "Good People, Great Lawyers," we mean it.” Source: RevenueBase Database · checked Sep 14, 2026
18	Mullen & Mcgourty, P.C	Indirect evidence	Boston, MA, United StatesHQ checked Sep 14, 2026	51-200	18 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 14, 2026
19	Rawson, Merrigan, & Litner LLP	Indirect evidence	Boston, MA, United StatesHQ checked Sep 14, 2026	11-50	16 contacts →
	Indirect evidence “Rawson Merrigan & Litner, LLP provides the representation you need, whenever you need it.” Source: RevenueBase Database · checked Sep 14, 2026
20	Dunn & Dunn P.C	Indirect evidence	Boston, MA, United StatesHQ checked Sep 14, 2026	11-50	11 contacts →
	Indirect evidence “Founded in 1928, Dunn and Dunn has extensive experience representing healthcare providers prior to and during all stages of litigation.” Source: RevenueBase Database · checked Sep 14, 2026
21	Hartley Michon Robb Hannon LLP	Partial evidence	Boston, MA, United StatesHQ checked Sep 14, 2026	1-10	11 contacts →
	Partial evidence “Hartley Michon Robb Hannon LLP concentrates in employment law, executive advocacy and litigation.” Source: RevenueBase Database · checked Sep 14, 2026
22	Gilman, Mclaughlin & Hanrahan, LLP	Partial evidence	Boston, MA, United StatesHQ checked Sep 14, 2026	11-50	11 contacts →
	Partial evidence “At the law firm of Gilman, McLaughlin & Hanrahan, LLP, we have been serving individuals and businesses in and around Boston, eastern Massachusetts and Cape Cod since 1975.” Source: RevenueBase Database · checked Sep 14, 2026
23	Coughlin Betke LLP	Strong evidence	Boston, MA, United StatesHQ checked Sep 14, 2026	11-50	10 contacts →
	Strong evidence “COUGHLIN BETKE LLP s a boutique law firm based out of Boston, Massachusetts, specializing in civil defense litigation and trial practice.” Source: RevenueBase Database · checked Sep 14, 2026
24	Tetzel Law, LLC	Partial evidence	Boston, MA, United StatesHQ checked Sep 14, 2026	1-10	10 contacts →
	Partial evidence “Tetzel Law is a motivated and compassionate team of Trial Lawyers that will provide efficient and detailed representation.” Source: RevenueBase Database · checked Sep 14, 2026
25	Diedrich & Donohue LLP	Partial evidence	Boston, United StatesHQ checked Sep 14, 2026	1-10	8 contacts →
	Partial evidence “Diedrich & Donohue, LLP is a law firm recognized for its trial experience, individualized client attention and proven litigation success.” Source: RevenueBase Database · checked Sep 14, 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: insurance defense law 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 insurance defense law firms.
Partial evidence: Its own public description names part of insurance defense law firms, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name insurance defense law 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 61 insurance defense law firms based in Boston, United States

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Insurance defense law firms based in Boston, United States at a glance

As of Sep 14, 2026

58.5%Verified-email coverage

26.4Average contacts per company

1-10Median size (employees)

Sep 14, 2026Page data refreshed

Companies by employee count

1-10

11-50

51-200

201-500

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 61 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 insurance defense law 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 “insurance defense law 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 insurance defense law 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 insurance defense law 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, 942 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.

Insurance defense law 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 insurance defense law 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 insurance defense law firms are there based in Boston, United States?

RevenueBase identified 61 insurance defense law 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?

Morrison Mahoney LLP, headquartered in Boston, tops this list with the largest team on record.

Which city in the United States has the most insurance defense law firms?

New York leads the United States with 235 headquartered companies, followed by Houston (178) and Chicago (166). Boston has 61.

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 942 verified decision-maker contacts tracked across these 61 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.

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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.