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Cal Henderson

Co-founder and CTO, Slack

Cal Henderson is the co-founder and CTO of Slack. He led the technical development of Flickr from its founding, pioneered the use of APIs, and created the basis for oAuth and oEmbed, now used by YouTube, Twitter, and may others. Cal has a Computer Science degree from the University of Central England.


About Slack
Launched: 2013  |  HQ: United States  |  Funding: €1.31B  |  Industry: Business Communication