WhoBuilt

Key facts

Founded by
Garry Tan, co-founder
Built by
Capabilities
Email posts could include attachments, which could be turned into a web gallery
Users could post by emailing post@posterous.com without creating an account
Acquired by
X, about $20 million

Timeline 7

Dated events, newest first. Open the sources under any item.

How we verify
Acquired2Founded1Built1Capability2
20262 events
May
  1. reported 2026-05Acquired
    X acquired Posterous
    about $20 million
    “Twitter bought it for about $20 million.” 3:30
    Unverified1 source· Talk
April
  1. reported 2026-04Acquired
    Twitter acquired Posterous
    “Posterous, a microblogging platform that sold to Twitter” 0:28
    Unverified1 source· Talk
20181 event
  1. reported 2018-09Founded
    Garry Tan founded Posterous
    co-founder
    “founder of Posterous” 0:00
    Verified3 sources· Talk
20084 events
  1. 2008Capability
    Email posts could include attachments, which could be turned into a web gallery
    “support photo attachments, take multiple attachments and turn them into a web gallery” 30:56
    Unverified1 source· Talk
  2. 2008Capability
    Users could post by emailing post@posterous.com without creating an account
    “All you had to do was send an email from whatever email client you already had.” 30:14
    Unverified1 source· Talk
  3. 2008Other
    Y Combinator funded Posterous
    “YC funded me in 2008 with a company called Posterous” 5:19
    Unverified1 source· Talk
  4. 2008Built
    Garry Tan built Posterous
    “I ended up building Posterous, my first YC startup, in 2008.” 1:56
    Unverified1 source· Talk

Talks 4

41:29
Tokenmaxxing: How Top Builders Use AI To Do The Work Of 400 Engineers

Garry Tan describes using AI coding agents to build and maintain software at a much higher pace, including rebuilding a blogging platform in days and creating tools such as G Stack and G Brain. He explains tokenmaxxing: spending more on models and supplying broad context to make research and coding more complete. His workflow combines detailed Markdown skills, planning and review, automated tests, browser based QA, and a human who supplies goals and judgment. He argues that builders should learn to repair brittle agent setups and keep control of their own tools and prompts as personal AI becomes more capable.

May 8, 2026· 41 minMentioned 1:56
21:49
How to Make Claude Code Your AI Engineering Team

Garry Tan explains how GStack turns Claude Code into an AI engineering team by combining thin scaffolding with specialist skills, clear workflows, and review. He demonstrates Office Hours reframing a simple tax-document idea into a broader product concept, then shows how adversarial review and Design Shotgun help refine the plan and interface. GStack also supports coding, code review, and browser-based QA through Playwright and Chromium. Tan describes using Conductor to run multiple parallel coding sessions and presents GStack as a way to move from scattered tasks to a repeatable software-building process.

Apr 23, 2026· 22 minMentioned 0:28
19:10
Why This Is The Perfect Time To Start A Startup

The speakers argue that college and early-career founders have advantages: energy, time to compound, and freedom from habits formed at large companies. They share examples of founders who started young and contrast the speed and impact of startups with slow, political work inside big tech. They say AI has created an unusually rich set of startup ideas and changed the landscape for finding product-market fit. For people aiming to build an exceptional company, they recommend starting early, working with intense focus, and treating the work as a long-term effort.

May 17, 2024· 19 minMentioned 5:44
1:06:45
Design for Startups

Garry Tan explains design as building useful products that also delight users, with empathy and a clear understanding of the problem at the center. He breaks startup design into product design, interaction design, and visual design, then walks through tools such as user research, personas, requirements, prioritization, wireframes, and usability testing. He recommends clear instructions, familiar interaction patterns, visual hierarchy, and removing unnecessary ornament. He closes by arguing that founders should treat customer support and user feedback as ongoing parts of product design.

Sep 19, 2018· 1 h 7 minDiscussed 0:00