Jack Dorsey is an American tech entrepreneur best known as the cofounder and former CEO of Twitter, and the founder and CEO of the payments company Square (now Block).

Quick Scoop: Who Is Jack Dorsey?

  • Full name: Jack Patrick Dorsey.
  • Born: November 19, 1976, in St. Louis, Missouri, USA.
  • Known for: Cofounding Twitter in 2006 and posting the first tweet, then later leading the company as CEO in two separate stints.
  • Other major company: Cofounded Square in 2009, later rebranded to Block, a financial-technology company focused on digital payments.
  • Current image: Often seen as a billionaire founder who moved from social media to financial tech and decentralization, especially around Bitcoin.

Career Highlights

  • In the early 2000s, Dorsey worked on dispatch software for taxis and emergency services, which helped inspire the idea of short, real-time status updates that evolved into Twitter.
  • In March 2006, he and collaborators built a prototype of what became Twitter, and he posted the first tweet on March 21, 2006.
  • He served as Twitter’s CEO from 2007 to 2008, then again from 2015 to 2021, overseeing its growth into a global communication platform but also facing criticism over content moderation and misinformation.
  • After being pushed out as CEO the first time, he focused on Square, which launched publicly in 2010 and grew quickly by letting small businesses accept card payments via mobile devices.
  • Square was rebranded as Block in 2021, reflecting a broader push into financial services and blockchain-related initiatives.

Recent and “Latest News” Context

  • Dorsey stepped down as Twitter’s CEO in November 2021, handing the role to Parag Agrawal, ending his second tenure running the company.
  • After Elon Musk later bought Twitter and rebranded it as X, Dorsey became more of an outside figure, better known for his role at Block and his interest in decentralized social networks and Bitcoin.
  • He has remained a prominent Bitcoin advocate, repeatedly framing Bitcoin as a key technology for the future of the internet and financial systems.

Forum / Discussion Angle

When people online ask “who is Jack Dorsey” today, they’re usually debating one of a few angles:

  • Visionary founder: Supporters point to his role in inventing a new style of real-time, short-form communication that reshaped news, politics, and celebrity culture.
  • Controversial platform leader: Critics focus on Twitter’s struggles with harassment, misinformation, and political content, arguing that his leadership was often reactive or unclear.
  • Crypto and decentralization advocate: Tech and finance forums often now associate him more with Bitcoin, Block, and decentralized tech experiments than with day-to-day social media management.

An example of how he’s discussed: one thread might praise him for “changing how the world talks in 140/280 characters,” while another accuses him of failing to protect users or of being too idealistic about free speech—illustrating how polarizing his legacy is.

Meta description (SEO-style):
Jack Dorsey is the American billionaire entrepreneur who cofounded Twitter, later led it as CEO, and built the fintech giant Square/Block, now focusing on Bitcoin, decentralization, and new tech ventures.

Information gathered from public forums or data available on the internet and portrayed here.