room337.

Jason Lee · Founder & Investor

I back relentless founders
solving hard problems.

From fusion energy to AI safety to synthetic biology — investing my own capital, moving fast, and staying involved after the check clears.

Hard problems. Relentless founders. Personal conviction.

Get in touch
Independent capital. Enduring commitment. Meet Jason
Jason Lee, founder and investor behind Room337
Jason Lee Entrepreneur. Founder. Investor.

01 / About

A founder first.
An investor by conviction.

I know what it takes to build something that hasn't existed before.

I founded DailyPay, exiting at a $2 billion valuation, then founded Salt Labs, acquired by Chime for $173 million. Today, I'm building my third company, Minim Science.

I look for founders pushing the edge of what's technically possible — the kind of work that takes deep expertise and a long horizon to get right.

Every check is my own money, so decisions are fast and there's no committee to go through.

More about me

02 / Portfolio

Conviction, in action.

Backing the people moving
what's possible forward.

01

Commonwealth
Fusion Systems

Building the next era of fusion energy.

Fusion energy Visit Commonwealth Fusion Systems (opens in a new tab) 02

ImmunoVec

Programmable medicines. New possibilities.

Biotechnology Visit ImmunoVec (opens in a new tab) 03

Leela

AI-powered compliance for financial services.

Artificial intelligence Visit Leela (opens in a new tab)

03 / Get in touch

Building something
ambitious?

Send a note. I read everything myself.