Mootools JavaScript Foundation

MooTools JavaScript Library

Guillermo contributed to MooTools as a teenager, which later became foundational for Facebook's JavaScript infrastructure. This compact, modular JavaScript framework helps developers write powerful and flexible code.

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Guillermo Rauch

CEO and founder of Vercel, creator of Socket.IO

Guillermo Rauch is an Argentine-born software engineer and entrepreneur best known as the founder and CEO of Vercel (originally ZEIT, founded 2015), a cloud application company that created and maintains the Next.js web development framework. Before Vercel, he created Socket.IO, the widely-used real-time event-driven JavaScript communication library. Vercel raised $250 million in a Series E round in May 2024 at a $3.25 billion valuation and is also the maker of the v0 AI web development tool and the AI SDK.

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founder
CEO
software engineer
entrepreneur
open-source
JavaScript
Next.js
cloud infrastructure
investor-backed startup