Company lists · Data refreshed September 2026

Top 25 Big six law firms based in San Francisco, United States

Name: Big six law firms based in San Francisco, United States
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 23, 2026 147 companies tracked

RevenueBase identified 147 big six law firms headquartered in San Francisco, United States as of September 2026 and tracks 11,678 professional contacts across them, including 7,567 with verified work emails. Across the United States, New York is the largest hub for this category (668 companies); San Francisco has 147.

This list covers big six law firms headquartered in San Francisco, 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 23, 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 23, 2026 86% judged on-target in blind review

147Companies

11,678Contacts tracked

7,567Verified emails

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The 25 largest big six law firms based in San Francisco, United States

Ranked by team size

Top 25 of 147 big six law firms based in San Francisco, United States, ranked by team size, largest first. Data refreshed Sep 23, 2026. RevenueBase Smart Search rates how each company's information relates to big six 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	Orrick, Herrington & Sutcliffe LLP	Partial evidence	San Francisco, CA, United StatesHQ checked Sep 23, 2026	1,001-5,000	3,066 contacts →
	Partial evidence “Orrick is a global law firm focused on serving the Technology & Innovation, Energy & Infrastructure, Finance and Life Sciences & HealthTech sectors.” Source: RevenueBase Database · checked Sep 23, 2026
2	Gordon Rees Scully Mansukhani, LLP	Partial evidence	San Francisco, CA, United StatesHQ checked Sep 23, 2026	1,001-5,000	2,846 contacts →
	Partial evidence “As the only full-service law firm with offices and attorneys in all 50 states, Gordon Rees Scully Mansukhani delivers maximum value to our clients by combining the resources of a…” Source: RevenueBase Database · checked Sep 23, 2026
3	Morrison Foerster	Indirect evidence	San Francisco, CA, United StatesHQ checked Sep 23, 2026	1,001-5,000	2,667 contacts →
	Indirect evidence “Morrison Foerster transforms complexity into advantage.” Source: RevenueBase Database · checked Sep 23, 2026
4	Rimon PC	Partial evidence	San Francisco, CA, United StatesHQ checked Sep 23, 2026	201-500	308 contacts →
	Partial evidence “Rimon is a highly selective entrepreneurial firm that combines the dynamic client service, teamwork and agility of a high-end boutique law firm with the deep multidisciplinary…” Source: RevenueBase Database · checked Sep 23, 2026
5	Farella Braun Martel LLP	Partial evidence	San Francisco, CA, United StatesHQ checked Sep 23, 2026	201-500	250 contacts →
	Partial evidence “Farella Braun + Martel LLP is a leading Northern California law firm representing corporate and private clients in sophisticated business and real estate transactions and complex…” Source: RevenueBase Database · checked Sep 23, 2026
6	Keker, VAN Nest & Peters LLP	Indirect evidence	San Francisco, CA, United StatesHQ checked Sep 23, 2026	51-200	250 contacts →
	Indirect evidence “Keker, Van Nest & Peters is a trial-practice litigation firm located in San Francisco.” Source: RevenueBase Database · checked Sep 23, 2026
7	Phillips Spallas & Angstadt LLP	Indirect evidence	San Francisco, CA, United StatesHQ checked Sep 23, 2026	51-200	121 contacts →
	Indirect evidence “Phillips, Spallas & Angstadt LLP is an AV-rated, civil litigation firm with an unparalleled record of successful results for our clients.” Source: RevenueBase Database · checked Sep 23, 2026
8	Murphy, Pearson, Bradley & Feeney	Indirect evidence	San Francisco, CA, United StatesHQ checked Sep 23, 2026	51-200	104 contacts →
	Indirect evidence “For forty-five years, Murphy, Pearson, Bradley & Feeney has provided clients with extraordinary trial and litigation skills.” Source: RevenueBase Database · checked Sep 23, 2026
9	Scale LLP	Partial evidence	San Francisco, CA, United StatesHQ checked Sep 23, 2026	51-200	98 contacts →
	Partial evidence “Scale LLP is a national, full-service law firm designed for modern business.” Source: RevenueBase Database · checked Sep 23, 2026
10	Shartsis Friese LLP	Partial evidence	San Francisco, CA, United StatesHQ checked Sep 23, 2026	51-200	89 contacts →
	Partial evidence “Shartsis Friese LLP is one of San Francisco’s leading law firms.” Source: RevenueBase Database · checked Sep 23, 2026
11	Sideman & Bancroft LLP	Indirect evidence	San Francisco, CA, United StatesHQ checked Sep 23, 2026	51-200	83 contacts →
	Indirect evidence “Some of the largest companies in the world, and some of the wealthiest families in America, value and respect the service, creativity, and commitment of the attorneys of Sideman &…” Source: RevenueBase Database · checked Sep 23, 2026
12	Bartko LLP	Indirect evidence	San Francisco, CA, United StatesHQ checked Sep 23, 2026	51-200	66 contacts →
	Indirect evidence “Bartko LLP is a mid-size firm dedicated to strategic representation of clients in California, nationally and abroad.” Source: RevenueBase Database · checked Sep 23, 2026
13	Rogers Joseph O'donnell	Indirect evidence	San Francisco, CA, United StatesHQ checked Sep 23, 2026	51-200	61 contacts →
	Indirect evidence “Rogers Joseph O'Donnell is a litigation boutique founded in 1981 by a group of attorneys who believed - and continue to believe - that smaller is smarter.” Source: RevenueBase Database · checked Sep 23, 2026
14	Hassard Bonnington LLP	Indirect evidence	San Francisco, CA, United StatesHQ checked Sep 23, 2026	11-50	43 contacts →
	Indirect evidence “Hassard Bonnington, founded over a century ago, is a highly regarded litigation firm known for consistently and successfully advocating for our clients in cutting edge complex…” Source: RevenueBase Database · checked Sep 23, 2026
15	Rosen Bien Galvan & Grunfeld LLP	Indirect evidence	San Francisco, CA, United StatesHQ checked Sep 23, 2026	11-50	42 contacts →
	Indirect evidence “Rosen Bien Galvan & Grunfeld LLP, founded in San Francisco in 1990, focuses its practice on complex litigation.” Source: RevenueBase Database · checked Sep 23, 2026
16	Dhillon LAW Group INC	Partial evidence	San Francisco, CA, United StatesHQ checked Sep 23, 2026	11-50	42 contacts →
	Partial evidence “With offices in California, New Jersey, Florida, Virginia and a law practice that spans the country, Dhillon Law Group’s business and constitutional law practice spans business…” Source: RevenueBase Database · checked Sep 23, 2026
17	Howard Rice	Partial evidence	San Francisco, CA, United StatesHQ checked Sep 23, 2026	501-1,000	36 contacts →
	Partial evidence “Howard Rice Nemerovski Canady Falk & Rabkin, P.C, is a San Francisco law firm with leading national and international practices, representing entities and individuals across a…” Source: RevenueBase Database · checked Sep 23, 2026
18	Leland, Parachini, Steinberg, Matzger & Melnick LLP	Partial evidence	San Francisco, CA, United StatesHQ checked Sep 23, 2026	11-50	33 contacts →
	Partial evidence “The attorneys of Leland, Parachini, Steinberg, Matzger & Melnick LLP combine their skills in business, family law, real estate, corporate, business litigation, alternate dispute…” Source: RevenueBase Database · checked Sep 23, 2026
19	Lewis & Llewellyn LLP	Partial evidence	San Francisco, CA, United StatesHQ checked Sep 23, 2026	11-50	28 contacts →
	Partial evidence “Lewis & Llewellyn LLP is a California-based law firm that represents plaintiffs and defendants throughout the United States.” Source: RevenueBase Database · checked Sep 23, 2026
20	Lloyd & Mousilli	Partial evidence	San Francisco, CA, United StatesHQ checked Sep 23, 2026	11-50	25 contacts →
	Partial evidence “We are a boutique law firm specializing in intellectual property, technology law and related litigation.” Source: RevenueBase Database · checked Sep 23, 2026
21	Hugo Parker LLP	Indirect evidence	San Francisco, CA, United StatesHQ checked Sep 23, 2026	11-50	24 contacts →
	Indirect evidence “The lawyers at HUGO PARKER have a winning record at trial, providing clients with sound strategic advice and skilled trial and appellate representation before state and federal…” Source: RevenueBase Database · checked Sep 23, 2026
22	Inventus LAW	Partial evidence	San Francisco, CA, United StatesHQ checked Sep 23, 2026	11-50	22 contacts →
	Partial evidence “Inventus is an innovative global law firm which provides superior legal services to entrepreneurs, startups, and mid-sized companies.” Source: RevenueBase Database · checked Sep 23, 2026
23	Gallo LLP	Indirect evidence	San Francisco, CA, United StatesHQ checked Sep 23, 2026	1-10	22 contacts →
	Indirect evidence “Gallo LLP focuses on complex civil litigation.” Source: RevenueBase Database · checked Sep 23, 2026
24	Pranger LAW PC	Partial evidence	San Francisco, CA, United StatesHQ checked Sep 23, 2026	11-50	21 contacts →
	Partial evidence “Pranger Law PC is a premier boutique law firm specializing in Intellectual Property, Promotions, and Advertising law services.” Source: RevenueBase Database · checked Sep 23, 2026
25	Verso LAW Group LLP	Partial evidence	San Francisco, CA, United StatesHQ checked Sep 23, 2026	11-50	21 contacts →
	Partial evidence “We created Verso Law Group with a shared promise to tailor our firm’s focus to our clients’ objectives and expectations.” Source: RevenueBase Database · checked Sep 23, 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: big six 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 big six law firms.
Partial evidence: Its own public description names part of big six law firms, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name big six 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 147 big six law firms based in San Francisco, United States

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Big six law firms based in San Francisco, United States at a glance

As of Sep 23, 2026

64.8%Verified-email coverage

79.4Average contacts per company

1-10Median size (employees)

Sep 23, 2026Page data refreshed

Companies by employee count

1-10

11-50

51-200

201-500

501-1,000

1,001-5,000

Email recency for this list is measured across the whole United States list rather than for San Francisco, so it is reported there. Company counts and contact totals on this page are exact for San Francisco, over 147 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 big six 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 San Francisco, United States whose own description of what they do matches “big six 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 big six 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 big six law firms, and records with no verified work email. Companies headquartered outside San Francisco 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, 7,567 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 23, 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.

Big six 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 big six 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 big six law firms are there based in San Francisco, United States?

RevenueBase identified 147 big six law firms headquartered in San Francisco, 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?

Orrick, Herrington & Sutcliffe LLP, headquartered in San Francisco, tops this list with the largest team on record.

Which city in the United States has the most big six law firms?

New York leads the United States with 668 headquartered companies, followed by Chicago (344) and Los Angeles (340). San Francisco has 147.

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 7,567 verified decision-maker contacts tracked across these 147 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 23, 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.