Started originally as an internal tool named Tiny Speck during the development of an online game, Slack launched in 2013 and rapidly transformed corporate communications by replacing internal emails with structured channels. The company experienced breakout growth, went public via a direct listing in 2019, and was later acquired by Salesforce in 2021 for $27.7 billion to anchor its cloud software strategy.
Active Founders
SB
Stewart Butterfield
Co-Founder
Stewart Butterfield is a Canadian entrepreneur best known for co-founding Flickr and Slack. He led Slack as CEO through its explosive growth and acquisition by Salesforce.
Slack
Founded2009
BatchW2010
Team Size2,500
StatusPublic
LocationSan Francisco, CA, USA
CategoryProductivity