ANDREW CHEN
Andreessen Horowitz general partner, former Uber growth lead, and author of "The Cold Start Problem" — the growth expert who became a VC
Andrew Chen literally wrote the book on network effects, "The Cold Start Problem", while investing in companies trying to solve that exact problem at Andreessen Horowitz. Before VC, he led rider growth at Uber during its hypergrowth years. He led a16z's Series A in Substack and backed Clubhouse at its peak. He is the rare person who can explain why your app is not growing and write the check to fix it.
Net Worth
Not publicly disclosed
Verified Sep 2026
Nationality
American
Time Horizon
Long-Term
Risk Appetite
7 / 10
CAREER & BACKGROUND
Chen studied applied math at the University of Washington and started blogging about growth marketing and metrics in the mid-2000s. That blog, now hundreds of essays, became one of the most-read in Silicon Valley.
Before a16z he worked at a number of venture-backed startups and angel invested in Patreon, Substack, Clubhouse and Wish.\n\nHe joined Uber to lead the Rider Growth teams during its explosive expansion.\n\nIn 2018 he joined Andreessen Horowitz as a general partner, focused on consumer and marketplace companies. He led the Substack Series A in 2019 and backed Clubhouse, Snackpass, Sandbox VR and Sleeper.
Today much of his focus is a16z speedrun, for games, entertainment and AI startups.\n\nHis book "The Cold Start Problem" came out in late 2021 and became a bestseller.
COMPANIES & ROLES
Andreessen Horowitz, general partner since 2018. He led a16z's $15.3 million Series A in Substack in 2019 and joined its board.
His other a16z deals include Clubhouse, Snackpass, Sandbox VR and the fantasy sports app Sleeper. These days he spends much of his time on a16z speedrun, the firm's program for early games, entertainment and AI startups.
Before a16z he was an angel in Patreon, Substack, Clubhouse and Wish.\n\nUber, where he led the Rider Growth teams before joining a16z.\n\nAuthor of "The Cold Start Problem" on network effects (Harper Business, 2021).
INVESTING STYLE & PHILOSOPHY
Chen invests in consumer and marketplace companies where network effects are the primary growth driver. His expertise in growth marketing means he can evaluate not just the product but the growth engine.
He looks for the "atomic network" — the smallest viable group of users that makes a network product valuable. If the atomic network is activated, the product can scale.
If it isn’t, no amount of money will fix it.
THE PLAYBOOK
Risk Approach
High. Consumer and social products are unpredictable.
Clubhouse went from hyped to forgotten in a year. But the upside of finding the next Uber-scale consumer product is enormous.
Money Habits
Chen is based in the Bay Area and very active on social media. He has written hundreds of essays on growth and startups at andrewchen.com over nearly two decades.
That archive is his personal brand, and it drives deal flow, because founders seek him out.
BIGGEST WIN
Substack. a16z led its $15.3 million Series A in July 2019 with Chen on point, and he took a board seat.
It has since become the default home for independent writers, the exact kind of network-effect business his book is about. His work at Uber was not a VC investment, but the rider growth machine he helped run fed a company that is now public and worth well over $100 billion.
BIGGEST MISTAKE
Clubhouse was the highest-profile disappointment. The audio social platform exploded during COVID lockdowns and then collapsed when people went back to normal life.
It went from a $4 billion valuation to relative obscurity.
FINANCIAL PHILOSOPHY
Chen believes that network effects are the most important dynamic in technology business building. Products with strong network effects become natural monopolies.
Products without them become commodities. His entire investment framework is about identifying and evaluating network effects.
FAMILY & PERSONAL LIFE
Based in the Bay Area. Active on Twitter and through his blog.
Personal life kept relatively private.
EDUCATION
University of Washington, BS in Applied Mathematics. No MBA.
His real education was blogging, Uber, and reading every growth study he could find.
BOOKS & RESOURCES
Explains the engagement loops he evaluates in consumer products
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