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Guillermo Rauch

Founder and CEO of Vercel; co-author of Next.js and author of Socket.IO and Mongoose

Guillermo Rauch is a software engineer and the founder and CEO of Vercel, the company behind the Next.js React framework and a cloud platform for deploying web applications and agents. Rauch's own site describes a career built on the web and open source, including authoring the Socket.IO real-time library and the Mongoose MongoDB library, and designing and co-authoring Next.js.146

Open-source work

Rauch's early open-source work was in JavaScript: Rauch was a member of the MooTools core team, and Rauch's startup LearnBoost contributed to Node.js ecosystem projects such as Express, Connect, Jade and Stylus. Rauch went on to author Socket.IO, for real-time communication, and Mongoose, for accessing MongoDB data.189

Rauch also authored the Hyper terminal emulator built on web technologies and collaborated with Shu Ding on the design of the SWR data-fetching library. Rauch wrote one of the early books on Node.js, "Smashing Node.js: JavaScript Everywhere".1

Vercel and Next.js

Rauch's company, then called ZEIT, started in 2016 with a command-line deployment tool for individual developers, and in October 2016 open-sourced Next.js in a launch post co-written by Naoyuki Kanezawa, Rauch and Tony Kovanen. In April 2020 the company renamed itself Vercel, with Rauch signing as CEO and founder.457

Rauch's 2025 essay "The AI Cloud" describes a shift in the web and the cloud from pages to agents, and the infrastructure Vercel builds for AI apps and agents. Vercel's about page now presents the company as agentic infrastructure for apps and agents.36

Work

  • Next.js (external site: github.com)Open-source code

    Designed and co-authored the MIT-licensed React framework, which Rauch and colleagues open-sourced in October 2016 as a small framework for server-rendered universal JavaScript web apps.157

  • Socket.IO (external site: github.com)Open-source code

    Authored this MIT-licensed library, which its repository describes as bidirectional and low-latency communication for every platform.18

  • Mongoose (external site: github.com)Open-source code

    Authored Mongoose, an MIT-licensed MongoDB object modeling library designed to work in an asynchronous environment.19

Career timeline

  1. 2014

    Published the essay "7 principles of rich web applications" on rauchg.com.2

  2. 2016

    Started ZEIT with a deployment tool for individual developers.4

  3. Oct 25, 2016

    Co-wrote the post that open-sourced Next.js, a framework for server-rendered React apps.5

  4. Apr 21, 2020

    Announced, as CEO and founder, that ZEIT had been renamed Vercel.4

  5. Oct 17, 2025

    Published "The AI Cloud", an essay on infrastructure for AI agents.32

Other documented roles

Roles the sources document but that are not confirmed as current.

  • Founder of the file-sharing startup, later acquired by Automattic, Cloudup1
  • Earlier startup, an early production adopter of Node.js, LearnBoost1
  • Core team member; led development of the MooTools Forge package repository, MooTools1

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References · reviewed Oct 21, 2026

  1. 1.
    About — Guillermo Rauch (external site: rauchg.com)

    Guillermo Rauch · Official page · accessed Oct 21, 2026 · evidence reviewed Oct 21, 2026

  2. 2.
    Guillermo Rauch's blog (post index) (external site: rauchg.com)

    Guillermo Rauch · Official page · accessed Oct 21, 2026 · evidence reviewed Oct 21, 2026

  3. 3.
    The AI Cloud (external site: rauchg.com)

    Guillermo Rauch · Official page · published Oct 17, 2025 · accessed Oct 21, 2026 · evidence reviewed Oct 21, 2026

  4. 4.
    ZEIT is now Vercel (external site: vercel.com)

    Vercel · Announcement · published Apr 21, 2020 · accessed Oct 21, 2026 · evidence reviewed Oct 21, 2026

  5. 5.
    Next.js (launch post) (external site: vercel.com)

    Vercel · Announcement · published Oct 25, 2016 · accessed Oct 21, 2026 · evidence reviewed Oct 21, 2026

  6. 6.
    About Vercel (external site: vercel.com)

    Vercel · Official page · accessed Oct 21, 2026 · evidence reviewed Oct 21, 2026

  7. 7.
    vercel/next.js repository (MIT license) (external site: github.com)

    Vercel (GitHub repository) · Repository · accessed Oct 21, 2026 · evidence reviewed Oct 21, 2026

  8. 8.
    socketio/socket.io repository (MIT license) (external site: github.com)

    Socket.IO (GitHub repository) · Repository · accessed Oct 21, 2026 · evidence reviewed Oct 21, 2026

  9. 9.
    Automattic/mongoose repository (MIT license) (external site: github.com)

    Automattic (GitHub repository) · Repository · accessed Oct 21, 2026 · evidence reviewed Oct 21, 2026

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