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Person

Cal Henderson

Cal Henderson is a software engineer and technology executive who co-founded Slack and served as its chief technology officer until 2024.[1]regulatory filing sourceSlack/Salesforce merger proxy statementU.S. Securities and Exchange CommissionSlack’s SEC merger proxy identifies Henderson among the founders and names him as CTO in the merger arrangements.CheckedOpen original source [2]first-party sourceThe five-day workweek has left the buildingSlackSlack identifies Henderson as its co-founder and chief technology officer; Fortune reports his departure from the CTO role in 2024.CheckedOpen original source [3]independent sourceSlack CTO Cal Henderson is outFortuneFortune reports Henderson’s co-founder and CTO roles and his departure from Slack in 2024.CheckedOpen original source

Markdown

On this page

01

Core facts

Entity type
Person
Date of birth
17 January 1981[4]structured public data sourceCal Henderson — WikidataWikidataWikidata P569 dates the birth of Cal Henderson.CheckedOpen original source
Occupations
Software engineer and technology executive[2]first-party sourceThe five-day workweek has left the buildingSlackSlack identifies Henderson as its CTO and discusses his engineering leadership.CheckedOpen original source
Official profile or website
iamcal.com[5]first-party sourceiamcal.comiamcal.comCheckedOpen original source

02

Who is Cal Henderson?[1]regulatory filing sourceSlack/Salesforce merger proxy statementU.S. Securities and Exchange CommissionThe SEC identifies Henderson among the founders and names him as CTO in the merger arrangements.CheckedOpen original source [3]independent sourceSlack CTO Cal Henderson is outFortuneFortune reports the CTO change was effective January 2024 and that Henderson remained until March 1.CheckedOpen original source

While at Slack, Henderson was one of its founders and served as chief technology officer. He stepped down from the CTO role in January 2024 and left Slack in March 2024.

03

History

  1. Personal site iamcal.com has published since June 2000[6]first-party sourceAbout iamcal.comCal HendersonHenderson’s About page says he has maintained the site’s linklog and weblog regularly since June 2000.CheckedOpen original source

  2. Stepped down in January 2024; remained at Slack until March 1, 2024[3]independent sourceSlack CTO Cal Henderson is outFortuneFortune reports the CTO change was effective immediately on January 12 and that Henderson would remain until March 1.CheckedOpen original source

  3. Co-founder of Slack[1]regulatory filing sourceSlack/Salesforce merger proxy statementU.S. Securities and Exchange CommissionSlack’s SEC merger proxy explicitly lists Henderson among Slack’s founders.CheckedOpen original source

  4. Signed a founder voting and support agreement for Salesforce’s Slack merger[1]regulatory filing sourceSlack/Salesforce merger proxy statementU.S. Securities and Exchange CommissionThe SEC proxy names Henderson among Slack’s founders who signed the voting and support agreement.CheckedOpen original source

04

Leadership

Slack Cto
Chief technology officer of Slack until January 2024[3]independent sourceSlack CTO Cal Henderson is outFortuneFortune reports that Henderson stepped down as Slack CTO effective January 2024.CheckedOpen original source

05

Related entities

  • createdSlack[1]regulatory filing sourceSlack/Salesforce merger proxy statementU.S. Securities and Exchange CommissionSlack’s SEC merger proxy identifies Henderson among its founders.CheckedOpen original source

06

Sources

Reference numbers stay stable across this page and each source appears once, ordered by first visible use.

  1. Slack/Salesforce merger proxy statement

    U.S. Securities and Exchange Commission · regulatory filing source

  3. Slack CTO Cal Henderson is out

    Fortune · independent source

  4. Cal Henderson — Wikidata

    Wikidata · structured public data source

  5. iamcal.com

    iamcal.com · first-party source

  6. About iamcal.com

    Cal Henderson · first-party source

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