Company lists · Data refreshed September 2026

Top 14 International business law firms based in Costa Mesa, United States

Name: International business law firms based in Costa Mesa, United States
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 4, 2026 26 companies tracked

RevenueBase identified 26 company matches for international business law firms associated with Costa Mesa, United States as of September 2026 and tracks 536 professional contacts across them, including 329 with verified work emails. Across the United States, New York is the largest hub for this category (825 companies); Costa Mesa has 26.

This list covers company matches for international business law firms associated with Costa Mesa, 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 4, 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 4, 2026 How this list was built

26Companies

536Contacts tracked

329Verified emails

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The 14 largest international business law firms based in Costa Mesa, United States

Ranked by team size

Top 14 of 26 company matches for international business law firms based in Costa Mesa, United States, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Sep 4, 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	Wilner & O'reilly Immigration Lawyers	Exact match	Costa Mesa, CA, United StatesHQ recorded Sep 4, 2026	51-200	64 contacts →
	Exact match “Wilner & O'Reilly, APLC was formed in 2003, bringing together two top-rated attorneys recognized for their knowledge and ability in the field of immigration law to create one of…” Recorded in the RevenueBase company graph · Sep 4, 2026 · View company records in RevenueBase
2	Ross, Wolcott, Teinert & Prout LLP	Exact match	Costa Mesa, CA, United StatesHQ recorded Sep 4, 2026	11-50	14 contacts →
	Exact match “At Ross, Wolcott, Teinert & Prout LLP, we are dedicated to delivering exceptional legal services with a focus on quality, efficiency, and value.” Recorded in the RevenueBase company graph · Sep 4, 2026 · View company records in RevenueBase
3	David Hirson & Partners, LLP	Exact match	Costa Mesa, CA, United StatesHQ recorded Sep 4, 2026	1-10	13 contacts →
	Exact match “David Hirson & Partners, LLP has over 30 years of experience in immigration law.” Recorded in the RevenueBase company graph · Sep 4, 2026 · View company records in RevenueBase
4	Buckner, Robinson & Mirkovich	Exact match	Costa Mesa, CA, United StatesHQ recorded Sep 4, 2026	11-50	12 contacts →
	Exact match “With over 30 years of industry experience and recognition, Buckner, Robinson & Mirkovich offers only the highest caliber of experienced, efficient and business minded attorneys…” Recorded in the RevenueBase company graph · Sep 4, 2026 · View company records in RevenueBase
5	Randall Coffee Humphrey LLP	Exact match	Costa Mesa, CA, United StatesHQ recorded Sep 4, 2026	11-50	7 contacts →
	Exact match “Randall Coffee & Humphrey LLP (“RCH”) is a full-service business litigation and transactional law firm providing the highest quality service, experience and advice to individuals…” Recorded in the RevenueBase company graph · Sep 4, 2026 · View company records in RevenueBase
6	Pivotal LAW Firm, INC	Exact match	Costa Mesa, CA, United StatesHQ recorded Sep 4, 2026	1-10	3 contacts →
	Exact match “We are big law firm refugees.” Recorded in the RevenueBase company graph · Sep 4, 2026 · View company records in RevenueBase
7	Witt LAW Firm, PC	Exact match	Costa Mesa, CA, United StatesHQ recorded Sep 4, 2026	1-10	3 contacts →
	Exact match “The Witt Law Firm is committed to providing effective lawyering for our clients.” Recorded in the RevenueBase company graph · Sep 4, 2026 · View company records in RevenueBase
8	Goodman Mooney LLP	Exact match	Costa Mesa, United StatesHQ recorded Sep 4, 2026	1-10	3 contacts →
	Exact match “The attorneys of Goodman Mooney offer years of experience in the fields of business, computer technology, Internet, start-ups and sports and entertainment.” Recorded in the RevenueBase company graph · Sep 4, 2026 · View company records in RevenueBase
9	Isyanova LAW PC	Exact match	Costa Mesa, CA, United StatesHQ recorded Sep 4, 2026	1-10	3 contacts →
	Exact match “Being a business owner myself, I understand first-hand the challenges small-business owners face.” Recorded in the RevenueBase company graph · Sep 4, 2026 · View company records in RevenueBase
10	The Feldhake LAW Firm, A Professional Corporation	Exact match	Costa Mesa, CA, United StatesHQ recorded Sep 4, 2026	1-10	2 contacts →
	Exact match Recorded description not available. Recorded in the RevenueBase company graph · Sep 4, 2026 · View company records in RevenueBase
11	Oozoonian LAW Corporation	Exact match	Costa Mesa, CA, United StatesHQ recorded Sep 4, 2026	1-10	1 contacts →
	Exact match “Contracts & Business Law - Delivering unparalleled legal expertise and an outstanding client experience, OLC is committed to excellence.” Recorded in the RevenueBase company graph · Sep 4, 2026 · View company records in RevenueBase
12	Bois Legal Counsel	Exact match	Costa Mesa, CA, United StatesHQ recorded Sep 4, 2026	1-10	1 contacts →
	Exact match “In 2001, founder Tom Bois left a large international law firm to start Bois & Macdonald a boutique law practice.” Recorded in the RevenueBase company graph · Sep 4, 2026 · View company records in RevenueBase
13	The Beggs LAW Firm, APC	Exact match	Costa Mesa, CA, United StatesHQ recorded Sep 4, 2026	1-10	1 contacts →
	Exact match Recorded description not available. Recorded in the RevenueBase company graph · Sep 4, 2026 · View company records in RevenueBase
14	Keadjian Law, P.C	Exact match	Costa Mesa, CA, United StatesHQ recorded Sep 4, 2026	1-10	1 contacts →
	Exact match “Keadjian Law, P.C, is a law firm focused on providing businesses and business professionals with legal services in the areas of corporate transaction, corporate formation and…” Recorded in the RevenueBase company graph · Sep 4, 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 “international business 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 14 of 26 international business law firms based in Costa Mesa, United States

See the full list, filter by size, metro and specialty, and access 329 tracked professional contacts with verified work emails. Direct dials are available where recorded.

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International business law firms based in Costa Mesa, United States at a glance

As of Sep 4, 2026

61.4%Verified-email coverage

20.6Average contacts per company

1-10Median size (employees)

Sep 4, 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 Costa Mesa, so it is reported there. Company counts and contact totals on this page are exact for Costa Mesa, over 26 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 Costa Mesa, United States whose business descriptions match “international business 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 329 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 4, 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.

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

How many international business law firms are there based in Costa Mesa, United States?

RevenueBase identified 26 company matches for international business law firms associated with Costa Mesa, 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?

Wilner & O'reilly Immigration Lawyers 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 international business law firms?

New York leads the United States with 825 company records, followed by Chicago (321) and Los Angeles (302). Costa Mesa has 26.

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 329 professional contacts with verified work emails tracked across these 26 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 4, 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.