About Us
ZwillGen is a mid-size boutique law firm that specializes in helping clients navigate legal challenges related to data and emerging technologies.
Leaving behind the bureaucracy of Big Law has allowed us to focus on one thing—delivering high value legal advice to help our clients make the most of new technologies.
We have built a strong practice counseling leading Internet, media, and tech companies and handling their high profile online legal issues.
Following years of running practice groups at the nation’s largest law firms, ZwillGen was founded on the principle of delivering thoughtful and practical solutions more efficiently.
Today, we offer unique services from a team of highly specialized attorneys, some of whom have spent the last 20 years developing their knowledge and experience with leading clients, firms, and issues. We make legal advice more accessible to our clients by offering alternatives to the traditional hourly law firm model, including innovative approaches that directly align firm incentives with client success.
Our History
What began in 2010 as a big idea in a small Washington, DC row house has become a thriving coast-to-coast law firm with nearly forty attorneys and spread across four offices in Washington, DC, New York, Chicago, and San Francisco.
Founded in 2010 by Marc Zwillinger and Christian Genetski, Zwillinger Genetski LLP was known for its pioneering, anti-Big Law spirit and practical advice. In 2011, Zwillinger Genetski LLP began to grow and was rebranded as ZwillGen PLLC. By 2014, ZwillGen outgrew its Dupont Circle row house and moved a few blocks away to its current home at 1900 M Street NW.
In 2016, ZwillGen opened its California Subsidiary, ZG Subpoena Solutions, to help clients process third-party data requests. That same year, Managing Member and Founder Marc Zwillinger became known as “Apple’s Secret Weapon” for his representation of the company in Apple v. San Bernardino.
Today, ZwillGen continues to be known for its pioneering spirit and practical advice as it helps clients both big and small in a wide range of industries tackle emerging technology and data-related legal issues.
Achievements
Since our founding, we have been consistently recognized and ranked by some of the legal industry's leading publications for our client service and commitment to diversity.
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Ranked in Chambers USA 2025 – Privacy & Data Security: The Elite
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Ranked in Chambers USA 2025 – Gaming & Licensing
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Named a Top 6 Most Recommended Midsize Law Firm by BTI (2025)
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Ranked by Best Lawyers in the 2025 edition of the Best Law Firms publication
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Distinguished in Litigation by BTI
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Listed in Vault's Top 150 Under 150 (2025)
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Voted by peers as a Best Law Firm for Privacy & Data Security (2025)
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Ranked in Chambers FinTech 2024
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Ranked in BTI’s Client Service A-Team 2024
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Recognized as some of the Best Attorneys for Startups by The Information
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Shortlisted by Chambers for Privacy & Data Security Law Firm of the Year
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Listed in the GDR 100 2023
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Ranked 7th in Law360's 2021 Glass Ceiling Report for our female Shareholder representation
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Law360 Privacy Group of the Year (2018)
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Law360 Consumer Protection Group of the Year (2018)
Firm News
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June 11, 2025
ZwillGen Announces New Fellowship and Internship in Memory of Hannah Schaller
WASHINGTON, D.C. – June 11, 2025 – ZwillGen announced today the creation of the Hannah Schaller Memorial Skylark Fellowship, a new position within the firm’s post-graduate Fellowship Program. This role honors the life and legacy of Hannah Schaller, a...
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June 5, 2025
ZwillGen Recognized in 2025 Chambers USA Guide for Excellence in Privacy and Gaming Law
WASHINGTON, D.C. – June 5, 2025 – ZwillGen is proud to announce its recognition in the 2025 edition of Chambers USA, a leading guide to the legal profession. This marks the 15th consecutive year ZwillGen has been...
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March 26, 2025
ZwillGen Statement on the Escalating Attacks Against the Legal Profession
We at ZwillGen are deeply alarmed by the increasingly aggressive campaign by the current administration against law firms that represent clients disfavored by the administration or that litigate against the federal government. The recent executive...
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March 12, 2025
Remembering Hannah Schaller
It is with deep sadness that we share the passing of our dear colleague and friend, Hannah Schaller. Hannah was a remarkable attorney whose contributions to the field of privacy were uniquely impactful. She had an...
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January 8, 2025
ZwillGen Bolsters Artificial Intelligence Practice With Group Acquisition of Luminos.Law Lawyers and Data Scientists
WASHINGTON, D.C., JANUARY 8, 2025 – ZwillGen announced today a group acquisition to add the lawyers, data scientists, proprietary processes, and technology from Luminos.Law LLP, an innovative multidisciplinary firm that blends legal advisory services with the skills of...
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October 2, 2024
ZwillGen Goes Global with First UK-Based Counsel as Part of Latest Expansion of Firm
Washington, D.C. – October 2, 2024 – ZwillGen PLLC today announced the addition of four attorneys to its roster that will deepen the firm’s experience in its core practice areas while expanding its ability to provide clients with...
Our Culture
We like the work we do and we like each other. And we take our work seriously, but we don't take ourselves too seriously.
