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§ Founder & Investor Profile

Cal Henderson

ActiveFounder Investor

Updated:Apr 8, 2026

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Quick Facts

Role: Co-Founder and CTO
Company: Slack
Status: Active
Type: Founder, Investor

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Recent News & Mentions

Aug 1, 2018FundingSlack - Series H Sep 1, 2017FundingSlack - Series G Jul 26, 2017FundingSlack - Other Equity Apr 1, 2016FundingSlack - Other Equity Mar 1, 2016FundingSlack - Series F Apr 1, 2015FundingSlack - Series E Oct 31, 2014FundingSlack - Other Equity Oct 1, 2014FundingSlack - Series D Apr 25, 2014FundingSlack - Other Equity Apr 1, 2014FundingSlack - Series C

Experience

Co-Founder and CTOFounderCurrent

Present - Present

Frequently Asked Questions

Who is Cal Henderson?

Cal Henderson is Co-Founder and CTO at Slack.

What companies has Cal Henderson founded?

Cal Henderson co-founded Slack.