Company lists · Data refreshed September 2026
Top 18 Internet law firms based in Washington, United States
RevenueBase identified 30 internet law firms headquartered in Washington, United States as of September 2026 and tracks 298 professional contacts across them, including 201 with verified work emails. New York is the largest hub.
This list covers internet law firms headquartered in Washington, 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, how directly it supports the match, and when it was last checked. 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.
The 18 largest internet law firms based in Washington, United States
Ranked by team size| # | Company | Contacts | |||
|---|---|---|---|---|---|
| 1 | ZwillgenPartial evidence | 72 | |||
“ZwillGen is a boutique law firm specializing in technology and privacy law.” Source: company website · checked Sep 4, 2026Thanks. The Data Team will review it. | |||||
| 2 | 40 | ||||
“O+Z is a dynamic litigation boutique founded by attorneys with extensive experience protecting content and brands.” Source: company website · checked Sep 4, 2026Thanks. The Data Team will review it. | |||||
| 3 | 34 | ||||
“Kelly IP is a leading IP law boutique focusing on litigation and counseling in trademark, unfair competition, false advertising, right-of-publicity, copyright, design protection…” Source: company website · checked Sep 4, 2026Thanks. The Data Team will review it. | |||||
| 4 | 32 | ||||
“Staas & Halsey LLP has provided clients with intellectual property protection and technical expertise since 1971.” Source: company website · checked Sep 4, 2026Thanks. The Data Team will review it. | |||||
| 5 | 18 | ||||
“Ifrah Law operates at the cutting edge of matters involving the intersection of business and the internet.” Source: company website · checked Sep 4, 2026Thanks. The Data Team will review it. | |||||
| 6 | 10 | ||||
“In 1998 Arnold Lutzker and Susan Lutzker founded Lutzker & Lutzker LLP with the vision of a small, dynamic practice that would specialize in digital age legal issues affecting the…” Source: company website · checked Sep 4, 2026Thanks. The Data Team will review it. | |||||
| 7 | Zeroday LAWPartial evidence | 8 | |||
“A Cybersecurity and privacy law firm.” Source: company website · checked Sep 4, 2026Thanks. The Data Team will review it. | |||||
| 8 | 7 | ||||
“Intellectual Property Law Firm.” Source: company website · checked Sep 4, 2026Thanks. The Data Team will review it. | |||||
| 9 | Winterfeldt IP GroupIndirect evidence | 6 | |||
“Founded by Brian Winterfeldt, Winterfeldt IP Group offers decades of experience with brand management and protection on both analog and digital platforms.” Source: company website · checked Sep 4, 2026Thanks. The Data Team will review it. | |||||
| 10 | Shruti LAW PllcPartial evidence | 6 | |||
“Shruti Law PLLC® is a Law Firm Headquartered in Washington, DC Shruti Costales is the sole owner and founder of Shruti Law PLLC®.” Source: company website · checked Sep 4, 2026Thanks. The Data Team will review it. | |||||
| 11 | 2 | ||||
“Hillyer Legal provides best-in-class legal representation in all sectors of intellectual property law.” Source: company website · checked Sep 4, 2026Thanks. The Data Team will review it. | |||||
| 12 | 2 | ||||
“ALPRIN LAW is a company based out of 1260 21st St NW, Washington, Washington DC, United States.” Source: company website · checked Sep 4, 2026Thanks. The Data Team will review it. | |||||
| 13 | Labach PllcIndirect evidence | 2 | |||
“Technology and Privacy Attorney for B2B software companies.” Source: company website · checked Sep 4, 2026Thanks. The Data Team will review it. | |||||
| 14 | 2 | ||||
“Alderman IP provides intellectual property and technology legal services to content creators and users, including technology platforms, and authors, artists and performers, as…” Source: company website · checked Sep 4, 2026Thanks. The Data Team will review it. | |||||
| 15 | 2 | ||||
“Boutique law firm specializing in trademark law.” Source: company website · checked Sep 4, 2026Thanks. The Data Team will review it. | |||||
| 16 | 2 | ||||
“Founded in 2020, the Law Office of Attorney Ambur C.” Source: company website · checked Sep 4, 2026Thanks. The Data Team will review it. | |||||
| 17 | Ubias LAW PllcIndirect evidence | 1 | |||
Source: company website · checked Sep 4, 2026Thanks. The Data Team will review it. | |||||
| 18 | Porges Trade LAW PllcPartial evidence | 1 | |||
“At Porges Trade Law, we focus on problem-solving for access to world markets.” Source: company website · checked Sep 4, 2026Thanks. The Data Team will review it. | |||||
Showing 18 of 30 internet law firms based in Washington, United States
See the full list, filter by size, metro and specialty, and get verified emails and direct dials for all 201 reachable decision-makers.
Free signup · no credit card
Internet law firms based in Washington, United States at a glance
As of Sep 4, 2026Companies by employee count
Email recency for this list is measured across the whole United States list rather than this city, so it is reported there. Company counts and contact totals on this page are exact for Washington, over 30 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 internet law firms, so some rows will be adjacent to the category rather than pure plays. The description and evidence 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 SmartSearch, the natural-language company search available to every RevenueBase user.
- What qualifies
- Companies headquartered in Washington, United States whose own description of what they do matches “internet law firms”. Matching reads each company's description, not its industry code or its name.
- What we exclude
- Companies whose own description does not clearly place them among internet law firms, and records with no verified work email. Companies headquartered outside Washington 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 an evidence 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, 201 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 4, 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.
Internet law firms by metro in the United States
- Internet law firms in New York80
- Internet law firms in Chicago33
- Internet law firms in Los Angeles30
- Internet law firms in Washington30
Frequently asked
How many internet law firms are there based in Washington, United States?
RevenueBase identified 30 internet law firms headquartered in Washington, 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?
Zwillgen, headquartered in Washington, tops this list with the largest team on record.
Which city has the most internet law firms?
New York leads with 80 headquartered companies, followed by Chicago (33) and Los Angeles (30).
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 201 verified decision-maker contacts tracked across these 30 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 4, 2026.
Ready to reach these companies? Verified emails and direct dials for all 30 internet law firms based in Washington, United States. Start with a free account, no credit card.
Get the full listRelated lists
Internet law firms by geography
- Internet law firms based in the United States
- Internet law firms based in Brazil
- Internet law firms based in Germany
- Internet law firms based in Spain
- Internet law firms based in France
- Internet law firms based in Italy
- Internet law firms based in Poland
- Internet law firms based in the United Kingdom
- Internet law firms based in the Netherlands
- Internet law firms based in Canada
- Internet law firms based in Mexico
- Internet law firms based in Australia
Browse the directory
Browse: Companies home · Internet law firms in United States · All United States lists · All Internet law firms lists · New lists
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.