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© 2026 Startup Intros, Inc.San Francisco, CA · Made for Founders

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§ Founder & Investor Profile

Eric Costello

ActiveFounder Investor

Updated:Apr 8, 2026

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Quick Facts

Role: Co-founder, Client Lead
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, Client LeadFounderCurrent

Present - Present

Frequently Asked Questions

Who is Eric Costello?

Eric Costello is Co-founder, Client Lead at Slack.

What companies has Eric Costello founded?

Eric Costello co-founded Slack.