Premium professional services redesigned for startups

Building a company isn't easy. We're here to help

Atrium’s founder, Justin Kan, started Atrium two+ years ago. After selling Twitch for nearly $1B, advising startups as a YC partner, and personally investing in over 120 other startups, he set out to reinvent how professional legal services are delivered.

Atrium believes that any entrepreneur can succeed in their business by leaning on the right experts and allowing you to refocus on your own superpower. We’re the first and only business that uses technology, experienced startup advisors, and a network of subject-matter experts to help you get where you want to go in the most effective manner.

So no matter what challenges you face, our advisors will guide you to the right solutions and providers who can help you see around corners and scale your company with ease.

Atrium by the numbers

$75.5 million

Raised from Andreessen Horowitz, Y Combinator, and General Catalyst, among others

$1 billion

Helped our clients raise over $1B in 100+ equity financings


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All content presented herein is for informational purposes only. Nothing should be construed as legal advice. Transmission and receipt of this information is not intended to create and does not constitute, an attorney-client relationship with Atrium LLP. There is no expectation of attorney-client privilege or confidentiality of anything you may communicate to us in this forum. Do not act upon any information presented without seeking professional counsel.