Company lists · Data refreshed September 2026

Top 25 Policy defense law firms based in Irvine, United States

Name: Policy defense law firms based in Irvine, United States
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 29, 2026 44 companies tracked

RevenueBase identified 44 company matches for policy defense law firms associated with Irvine, United States as of September 2026 and tracks 817 professional contacts across them, including 490 with verified work emails. Across the United States, Washington is the largest hub for this category (499 companies); Irvine has 44.

This list covers company matches for policy defense law firms associated with Irvine, 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 29, 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 29, 2026 How this list was built

44Companies

817Contacts tracked

490Verified emails

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The 25 largest policy defense law firms based in Irvine, United States

Ranked by team size

Top 25 of 44 company matches for policy defense law firms based in Irvine, United States, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Sep 29, 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	Walsworth LLP	Exact match	Irvine, CA, United StatesHQ recorded Sep 29, 2026	51-200	128 contacts →
	Exact match “Walsworth was founded over 35 years ago based on a sincere commitment to leveraging our experience, resources, and perspectives to meet our clients’ individualized and evolving…” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
2	Guardian Litigation Group, LLP	Exact match	Irvine, CA, United StatesHQ recorded Sep 29, 2026	201-500	102 contacts →
	Exact match “At Guardian Litigation Group, we are dedicated to consumer debt defense, providing strategic legal representation to individuals facing creditor lawsuits, unfair collection…” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
3	Aleshire & Wynder, LLP	Exact match	Irvine, CA, United StatesHQ recorded Sep 29, 2026	51-200	98 contacts →
	Exact match “Aleshire & Wynder, LLP is a unique law firm in California dedicated to the representation of public entities by providing innovative, ethical, and cost-effective legal…” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
4	Wolfe & Wyman LLP	Exact match	Irvine, CA, United StatesHQ recorded Sep 29, 2026	51-200	74 contacts →
	Exact match “WOLFE & WYMAN LLP is a civil litigation firm that assists corporate, institutional and individual clients with legal matters throughout the United States.” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
5	Macdonald & Cody, LLP	Exact match	Irvine, CA, United StatesHQ recorded Sep 29, 2026	11-50	65 contacts →
	Exact match “We founded Macdonald & Cody, LLP to provide effective, efficient and creative legal representation for our clients.” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
6	Houser LLP	Exact match	Irvine, CA, United StatesHQ recorded Sep 29, 2026	51-200	37 contacts →
	Exact match “Houser LLP, is a commercial and business litigation law firm serving Fortune 500 companies as well as small businesses.” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
7	Murtaugh Attorneys At LAW	Exact match	Irvine, CA, United StatesHQ recorded Sep 29, 2026	11-50	33 contacts →
	Exact match “Murtaugh \| Attorneys at Law is a multi-faceted law firm which prides itself on being responsive to its clients, and on achieving cost-effective solutions to their varied needs.” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
8	Umberg Zipser LLP	Exact match	Irvine, CA, United StatesHQ recorded Sep 29, 2026	11-50	28 contacts →
	Exact match “Umberg/Zipser LLP is a premier business litigation law firm.” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
9	Troutman Amin LLP	Exact match	Irvine, CA, United StatesHQ recorded Sep 29, 2026	11-50	25 contacts →
	Exact match “Troutman Amin, LLP is a nationally-recognized complex litigation and privacy consulting law firm based in Irvine, CA.” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
10	Lubin Pham Caplin LLP	Exact match	Irvine, CA, United StatesHQ recorded Sep 29, 2026	11-50	22 contacts →
	Exact match “If you own a home or a business, we’re here to help.” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
11	Mvpf Law, APC	Exact match	Irvine, CA, United StatesHQ recorded Sep 29, 2026	11-50	20 contacts →
	Exact match “Civil Litigation A Team Approach To Meet Your Legal Needs.” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
12	Palumbo Lawyers LLP	Exact match	Irvine, CA, United StatesHQ recorded Sep 29, 2026	11-50	19 contacts →
	Exact match “Palumbo attorneys' proven experience ranges from the courtroom to the boardroom.” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
13	Taylor Nelson Amitrano LLP	Exact match	Irvine, CA, United StatesHQ recorded Sep 29, 2026	11-50	16 contacts →
	Exact match “A tax controversy law firm based in Orange County, CA with over 150 years of combined experience.” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
14	Scott & Whitehead	Exact match	Irvine, CA, United StatesHQ recorded Sep 29, 2026	11-50	11 contacts →
	Exact match “The law firm of Scott and Whitehead specializes in labor and employment law, counseling and litigation.” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
15	Pleiss Sitar Mcgrath Gates & Ajello	Exact match	Irvine, CA, United StatesHQ recorded Sep 29, 2026	11-50	11 contacts →
	Exact match “At Pleiss Sitar McGrath Hunter & Hallack we are dedicated to providing the health and long term care industry with personalized and specialized litigation defense services which…” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
16	Miller Miller Gerber, LLP	Exact match	Irvine, CA, United StatesHQ recorded Sep 29, 2026	11-50	10 contacts →
	Exact match “Miller Miller Gerber LLP is a full-service law firm with an office in Irvine.” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
17	Plante Lebovic LLP	Exact match	Irvine, CA, United StatesHQ recorded Sep 29, 2026	11-50	7 contacts →
	Exact match “Plante Lebovic LLP is a business litigation law firm providing legal services to individuals and businesses throughout California.” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
18	Kading Briggs LLP	Exact match	Irvine, CA, United StatesHQ recorded Sep 29, 2026	11-50	6 contacts →
	Exact match Recorded description not available. Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
19	Brown Wegner LLP	Exact match	Irvine, CA, United StatesHQ recorded Sep 29, 2026	1-10	6 contacts →
	Exact match “Brown Wegner LLP is a law firm that focuses on business, commercial and intellectual property litigation.” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
20	Gordee, Nowicki & Blakeney LLP	Exact match	Irvine, CA, United StatesHQ recorded Sep 29, 2026	1-10	5 contacts →
	Exact match “Litigation and government contracts law firm located in Irvine, CA, offering litigation services and legal advice regarding business disputes, employment law, health care…” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
21	Abel LAW Offices, PC	Exact match	Irvine, CA, United StatesHQ recorded Sep 29, 2026	1-10	3 contacts →
	Exact match “Clients trust Abel Law Offices, PC to handle their business transactions, litigation, and preventative risk reduction because we provide sophisticated and individually tailored…” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
22	Watts LAW APC	Exact match	Irvine, CA, United StatesHQ recorded Sep 29, 2026	1-10	3 contacts →
	Exact match Recorded description not available. Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
23	Nexio LAW Firm	Exact match	Irvine, CA, United StatesHQ recorded Sep 29, 2026	1-10	3 contacts →
	Exact match “Nexio is an exclusive intellectual property and business litigation firm, offering services to private clients by referral or invitation only.” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
24	Magarian & Dimercurio, Aplc	Exact match	Irvine, CA, United StatesHQ recorded Sep 29, 2026	1-10	2 contacts →
	Exact match “EXPERIENCED TRIAL LAWYERS Nearly 45 years of combined experience.” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
25	Lawrence Bartels LLP	Exact match	Irvine, CA, United StatesHQ recorded Sep 29, 2026	11-50	1 contacts →
	Exact match “Lawrence Bartels LLP is a litigation and transactional boutique specializing in high-end commercial litigation and business disputes throughout California.” Recorded in the RevenueBase company graph · Sep 29, 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 “policy defense law 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 44 policy defense law firms based in Irvine, United States

See the full list, filter by size, metro and specialty, and access 490 tracked professional contacts with verified work emails. Direct dials are available where recorded.

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Policy defense law firms based in Irvine, United States at a glance

As of Sep 29, 2026

60.0%Verified-email coverage

18.6Average contacts per company

11-50Median size (employees)

Sep 29, 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 Irvine, so it is reported there. Company counts and contact totals on this page are exact for Irvine, over 44 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 Irvine, United States whose business descriptions match “policy defense law 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 490 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 29, 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.

Policy defense law firms by metro in the United States

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

How many policy defense law firms are there based in Irvine, United States?

RevenueBase identified 44 company matches for policy defense law firms associated with Irvine, 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?

Walsworth LLP tops the displayed preview by professional contacts tracked in RevenueBase. Recorded headquarters appear in the company rows.

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

Washington leads the United States with 499 company records, followed by New York (318) and Chicago (206). Irvine has 44.

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 490 professional contacts with verified work emails tracked across these 44 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 29, 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.