Company lists · Data refreshed September 2026
Top 25 Software patent litigation firms based in New York, United States
RevenueBase identified 153 software patent litigation firms headquartered in New York, United States as of September 2026 and tracks 3,068 professional contacts across them, including 1,434 with verified work emails. Across the United States, New York is the largest hub for this category.
This list covers software patent litigation firms headquartered in New York, 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 29, 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.
The 25 largest software patent litigation firms based in New York, United States
Ranked by team size| # | Company | Contacts | |||
|---|---|---|---|---|---|
| 1 | 242 contacts → | ||||
Partial evidence “Effectual Services is a well established and fast growing patent and legal support services company having experience and expertise in providing patent and legal services.” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 2 | 196 contacts → | ||||
Indirect evidence “A firm to turn to when all seems hopeless"-Chambers USA Axinn combines the skills, experience and dedication of the world's largest firms with the focus, responsiveness…” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 3 | 182 contacts → | ||||
Indirect evidence “Fross Zelnick is consistently recognized by clients and peers as one of the top IP law firms in the world.” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 4 | 181 contacts → | ||||
Partial evidence “Selendy Gay's practice is dedicated to excellence in commercial litigation, investigations, appellate advocacy, and arbitration.” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 5 | 140 contacts → | ||||
Partial evidence “Desmarais LLP is a leading intellectual property litigation firm with offices in New York, San Francisco, and Washington, D.C.” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 6 | 135 contacts → | ||||
Indirect evidence “As an enterprise grows, its need for intellectual property (IP) protection expands.” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 7 | 117 contacts → | ||||
Indirect evidence “Kenyon & Kenyon LLP is a leading intellectual property law firm whose sophisticated and business-oriented approach helps clients succeed with their intellectual property…” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 8 | 100 contacts → | ||||
Partial evidence “HG Law LLP (formerly Haley Guiliano LLP) is an international intellectual property law firm specializing in patent law from offices in London, New York and Silicon Valley.” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 9 | 85 contacts → | ||||
Indirect evidence “Since 1953, Amster, Rothstein & Ebenstein LLP has focused exclusively on representing clients in all facets of intellectual property law both domestically and internationally.” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 10 | 81 contacts → | ||||
Indirect evidence “For over 25 years, Haug Partners has provided synthesized multidisciplinary legal services for life science and technology businesses.” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 11 | 79 contacts → | ||||
Indirect evidence “Siri & Glimstad LLP has offices across the country and represents individuals and corporations in federal and state courts nationwide.” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 12 | 74 contacts → | ||||
Indirect evidence “No other.” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 13 | 48 contacts → | ||||
Partial evidence “Premier strategists, first-chair trial advocates and entrepreneurs at heart, we are a market-leading trial firm tackling high-value commercial litigation with precision and…” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 14 | 47 contacts → | ||||
Strong evidence “Copperpod IP provides technical analysis services for patent litigation and licensing.” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 15 | 45 contacts → | ||||
Indirect evidence “Our Firm launched with six founding partners in February 2024-but our team has a long history together that started nearly 15 years ago when our name partners David Elsberg, Rollo…” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 16 | 42 contacts → | ||||
Indirect evidence “With a main office in New York and offices in Los Angeles and Philadelphia, Leader Berkon Colao & Silverstein LLP represents a wide array of clients, including Fortune 500…” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 17 | 39 contacts → | ||||
Indirect evidence “Freedman Normand Friedland LLP specializes in resolving complex legal and business challenges.” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 18 | 35 contacts → | ||||
Partial evidence “Our core focus is commercial litigation, complemented by our exceptionally strong bankruptcy/restructuring and real estate transactional practices.” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 19 | 34 contacts → | ||||
Indirect evidence Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 20 | 28 contacts → | ||||
Indirect evidence “Lucas & Mercanti is an intellectual property law firm.” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 21 | 27 contacts → | ||||
Indirect evidence “Backed by more than 25 years of experience, Klaris is a boutique media, entertainment, technology, and intellectual property law firm that guides its clients through a changing IP…” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 22 | 26 contacts → | ||||
Indirect evidence “Ostrolenk Faber is a premier intellectual property boutique law firm.” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 23 | 23 contacts → | ||||
Indirect evidence “Epstein Drangel LLP is a leading intellectual property law firm.” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 24 | 22 contacts → | ||||
Indirect evidence “GS2Law is a boutique law firm focused on intellectual property, dispute resolution and commercial transactional matters.” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 25 | 21 contacts → | ||||
Indirect evidence Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
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: software patent litigation 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 software patent litigation firms.
- Partial evidence
- Its own public description names part of software patent litigation firms, so it works in or next to the category without describing itself that way.
- Indirect evidence
- The description shown does not name software patent litigation 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 153 software patent litigation firms based in New York, United States
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Software patent litigation firms based in New York, United States at a glance
As of Sep 29, 2026Companies by employee count
Email recency for this list is measured across the whole United States list rather than for New York, so it is reported there. Company counts and contact totals on this page are exact for New York, over 153 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 software patent litigation 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 New York, United States whose own description of what they do matches “software patent litigation 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 software patent litigation 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 software patent litigation firms, and records with no verified work email. Companies headquartered outside New York 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, 1,434 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 29, 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.
Software patent litigation firms by metro in the United States
- Software patent litigation firms in Chicago96
- Software patent litigation firms in Houston91
- Software patent litigation firms in Washington82
- Software patent litigation firms in Los Angeles76
- Software patent litigation firms in Dallas75
- Software patent litigation firms in Austin60
- Software patent litigation firms in Atlanta52
- Software patent litigation firms in San Francisco52
- Software patent litigation firms in San Diego49
- Software patent litigation firms in Irvine46
- Software patent litigation firms in Boston35
- Software patent litigation firms in Miami35
- Software patent litigation firms in Minneapolis33
- Software patent litigation firms in Seattle32
- Software patent litigation firms in Palo Alto28
- Software patent litigation firms in Alexandria25
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 software patent litigation 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 software patent litigation firms are there based in New York, United States?
RevenueBase identified 153 software patent litigation firms headquartered in New York, 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?
Effectual Services, headquartered in New York, tops this list with the largest team on record.
Which city in the United States has the most software patent litigation firms?
New York leads the United States with 155 headquartered companies, followed by Chicago (96) and Houston (91).
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 1,434 verified decision-maker contacts tracked across these 153 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 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 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.
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