Reid Hoffman

Venture Partner, Greylock Partners

Greylock partner, LinkedIn co-founder, network effects pioneer

Global, primarily United States$5M–$25M checks8 notable investments

SeedSeries ASeries B+

Website LinkedIn 𝕏@reidhoffman Greylock Partners Crunchbase

AIConsumerMarketplacesFintechEnterprise SaaSDeep Tech

Background

Reid Hoffman co-founded LinkedIn in 2003, building it into the world's largest professional network with over one billion members, before its acquisition by Microsoft in 2016. He previously served as EVP at PayPal as a founding board member responsible for all external relationships. Hoffman joined Greylock Partners in 2009, focusing on early-stage companies with network effects that can reach hundreds of millions of users. He co-founded Inflection AI in 2022 and Manas AI in 2025, the latter focusing on AI-powered cancer research alongside physician-scientist Siddhartha Mukherjee. He is the author of six bestselling books including Blitzscaling and Superagency, and hosts the Masters of Scale and Possible podcasts.

Investment Thesis

Networks and marketplaces are foundational to scaling businesses that reach hundreds of millions of people; thesis has expanded from social networks into AI platforms, autonomous transportation, and deep technology sectors where network effects create durable defensibility.