Stewart Butterfield

Stewart Butterfield
Co-founder and CEO, Slack

Website | @stewart

Stewart Butterfield is the co-founder and CEO of Slack, the platform for team communication which hundreds of thousands of professionals rely upon everyday. Its customer list ranges from well-known startups like Buzzfeed, Stripe and AirBnb to established giants like Adobe and PayPal.

Prior to Slack, Stewart co-founded and lead Flickr from its inception in late 2003 through its 2005 acquisition by Yahoo! and until 2008 by which point it was one of the largest web services in the world with over 50 million users and billions of photos.

In nearly two decades working on the web, Stewart has had a distinguished career as a designer, entrepreneur, and technologist. He has been named one of the 100 Most Influential People in the World by Time Magazine, BusinessWeek’s Top 50 Leaders, and been featured in interviews and articles by hundreds of publications and broadcasters including the Wall Street Journal, the BBC, The New York Times, CNN, and Financial Times.


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