Slack

Slack is a cloud-based team communication and collaboration platform originally developed by Stewart Butterfield, Eric Costello, Cal Henderson, and Serguei Mourachov. Slack's origin story is one of the most famous pivots in technology history: it was created as an internal communication tool during the development of Glitch, an online game by Tiny Speck, the company founded by Butterfield in 2009. When the game failed, the team realized their internal messaging tool had far greater potential....

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