The company that built it was actually trying to save a podcasting business that Apple had just made irrelevant. Odeo, founded by Evan Williams in 2005, found its entire product category swallowed almost overnight once iTunes added native podcast support — leaving the company scrambling for literally anything else to build. Out of that scramble came a side project nobody at Odeo initially treated as the main event: an internal tool that let a small team send short text updates to each other by SMS, dreamed up by a young engineer named Jack Dorsey and championed inside the company by colleague Noah Glass, who coined its original name, “twttr.”

From internal tool to its own company

Development on the project began in February 2006, and Dorsey posted what’s now recognized as the first tweet that March: “just setting up my twttr.” The service launched publicly on July 15, 2006, built by a team — Dorsey, Glass, Biz Stone, and Williams — that was still technically employed by a company whose actual business was podcasting. Twitter didn’t spin off as its own independent company until April 2007, nearly a year after its public debut, once Williams returned the remaining seed capital to Odeo’s investors and reorganized the side project into the main event.

That slow, unglamorous start is easy to lose track of now. A tool built to solve a specific, small-scale coordination problem for one struggling startup’s remaining staff had, within a year, become a separate company with its own name, its own funding, and its own founders steering it full time.

The conference that actually made it take off

Twitter’s real breakout moment didn’t happen at launch — it happened eight months later, at South by Southwest Interactive in March 2007. The festival’s organizers and the Twitter team put plasma screens throughout the venue displaying live tweets from attendees in real time, turning the app into a running backchannel for the entire conference. Usage exploded on-site: daily tweet volume jumped from around 20,000 to roughly 60,000 over the course of the event, according to figures widely cited from that SXSW. That single week is generally credited as the tipping point that took Twitter from a niche tool used mostly by tech insiders to something with genuine word-of-mouth momentum heading into its first full year as an independent company.

Twenty years from a coordination tool to a wire service

What Twitter actually became over the following two decades has almost nothing to do with the small-team coordination problem it was built to solve. It turned into the place breaking news, celebrity statements, and cultural flashpoints landed first, ahead of traditional outlets, for the better part of fifteen years — a role it kept even after Elon Musk’s 2022 acquisition and the platform’s 2023 rebrand to X. A project conceived to let a handful of Odeo employees text each other efficiently ended up restructuring how the entire planet found out about breaking news in real time, which might be the least likely outcome any pivot project in tech history has ever produced.